SY 5395-1991 Method for determination of cation exchange capacity and base content of clay

SY 5395-1991 Cation exchange capacity and base content of clay. SY5395-1991 Standard download decompression password: www.bzxz.net

Petroleum and Natural Gas Industry Standard of the People's Republic of China SY5395-91
Determination Method of Clay Cation Exchange Capacity
and Base Content
1991-11-20 Issued
Ministry of Energy of the People's Republic of China
Implementation on May 1, 1992
1 Subject Content and Scope of Application
Petroleum and Natural Gas Industry Standard of the People's Republic of China Clay Cation Exchange Capacity and Base Content Determination Method
This standard specifies the method for determining the clay cation exchange capacity and base content. SY5395--91
This standard is applicable to the determination of the cation exchange capacity and base content of clay and clay minerals in formations (including shale, oil and gas layer sandstone).
2 Method Summary
This standard uses ammonium ions to replace exchangeable cations. The exchangeable cations are determined by atomic absorption spectrophotometry. After the exchangeable ammonium ions are exchanged with rivet ions, the ion exchange capacity is determined by spectrophotometry. Potassium ions are used to exchange acidic aluminum hydride. The aluminum hydride content is determined by acid-base titration. The aluminum ions are determined by aluminum-chrome azurol S-surfactant micelle solubilization spectrophotometry. 3 Reagents and solution preparation
This standard uses secondary water.
3.1 Reagents
a. Ammonium chloride,
b. Anhydrous ethanol
c. Iodide;
d. Mercuric iodide,
e. Sodium chloride:
f. Potassium chloride;
9. Magnesium oxide
h. Calcium chloride,
1: lead foil g
j. Sodium hydroxide solution: c(NaOII)=D.D1mol/lk. Hydrochloric acid solution: V/=1:1
1. Nitrogen aqueous solution: V/W=1:Is
m, Hexamethylenetetramine solution: 13%,
n. Strontium fluoride solution: 10%1
0. Chloride solution: c(KC1)=0.5mol/L; P ascorbic acid solution: 0.2%.
3.2 Preparation of solution
3.2.10.2% Chromium tablet S: Weigh 1.0g of Chromium tablet S and place it in a beaker, add 10mL of anhydrous ethanol until it is completely dissolved, transfer to a 500mL volumetric flask, set, and shake well.
Approved by the Ministry of Energy of the People's Republic of China on November 20, 1991 and implemented on May 1, 1992
$Y5395--91
3.2.2 0.1% hexadecyl bromopyridine solution: weigh 2.0g of hexadecyl bromopyridine and place it in a small beaker, add 100mL of anhydrous ethanol to dissolve, transfer to a 500mL volumetric flask, adjust to volume, and shake. 3.2.3 1% phenanthroline solution: weigh 1.0g of o-phenanthroline and place it in a small beaker, add 10mL of anhydrous ethanol to dissolve, add 2 drops of 1:1 hydrochloric acid solution, and immediately transfer to a 100mL volumetric flask, adjust to volume, and shake. 3.2.4 Alkaline exchange solution: Weigh 26.8g ammonium fluoride and place it in a 1000mL beaker, add 150mL water, dissolve it, cut into 790ml 95% sodium hydroxide solution, stir and spread, then use 1:1 nitrogen water or hydrochloric acid to adjust the pH value to 8.3, then transfer it to a 1000ml volumetric flask, adjust the volume, and shake. 3.2.5 Neutral exchange solution: Except for not adjusting the pH value, the other steps are the same as 3.2.4. 3.2.6 Nester's reagent: Weigh 10g mercuric iodide and 7g potassium iodide and place them in an agate mortar: add a little water to grind into a paste, then add water until it is completely dissolved, then wash it with water into a small beaker, add 50mL 30% sodium hydroxide solution under continuous stirring, and finally transfer it all into a 100mL volumetric flask, adjust the volume, shake, and place it in a dark place for 3 days. When the solution is clear, transfer the upper liquid into a brown bottle and place it in a dark place. 3.2.7 Potassium, sodium, calcium, and magnesium mixed standard working solution: Weigh 1.1917g sodium chloride, 0.6355g sodium hydride, 6.9230g calcium chloride, and 0.2037g magnesium oxide into a small beaker, add 12mL 1:1 hydrochloric acid solution, add water to dissolve after a while, transfer to a 1000mL volumetric flask, adjust to volume, and shake well. This is the mixed standard reserve solution (the solution contains 0.625mg/mL potassium ion, 0.25mg/mL sodium ion, 2.5mg/mL calcium ion, and 0.125mg/mL magnesium ion). Collect an appropriate amount of this reserve solution and accurately dilute it 25 times to obtain the mixed standard working solution. 3.2.8 Aluminum standard working solution: Weigh 0.5000g aluminum foil, place in a small beaker, add 50mL 1:1 hydrochloric acid, cover, heat in water until completely dissolved, then transfer to a 500mL volumetric flask, dilute to volume, and mix to obtain standard stock solution. Take an appropriate amount of this stock solution and dilute it accurately to 10 times to obtain tungsten standard working solution. 3.2.9 Ammonium ion standard working solution: Weigh 0.2972g ammonium chloride dried at 110°C for 1-2h, place in a small beaker, dissolve and transfer to a 1000mL volumetric flask, dilute to volume, and shake to obtain ammonium ion standard stock solution (this solution contains 0.1tmg/ml of ammonium ions). Take an appropriate amount of ammonium ion standard stock solution and dilute it accurately to 10 times to obtain tungsten ion standard working solution. 3.2.10 Acid solution: 0.1%.
4 Instruments and equipment
a. Absorption spectrophotometer:
b. Visible light spectrophotometer
c. High-speed centrifuge
e. Analytical instrument: sensitivity 0.1mg!
f. Pharmaceutical balance: sensitivity 0.1g
9. Constant source drying oven;
h. Muffle furnace.
5 Sample treatment and acid-base determination
5.1 Sample treatment
Put the clay and shale dense mesh through a sieve with a pore size of 0.074mm. The core of the aerosol layer sandstone is first placed in a fat extractor and washed and rectified with alcohol-benzene solution (prepared according to the ratio of alcohol to benzene of 2:3), and passed through a sieve with an aperture of 0.250mm. The ground and sieved sample is placed in a temperature drying oven and dried at 105℃ to constant weight, and then taken out and placed in a safe desiccator. 5.2 Determination of the acidity and alkalinity of the sample
Weigh 2g of the sample in a bowl, place it in a small beaker, add 20mL of water, stir continuously for 30min, and use an acidometer to measure the pH value of the suspension to determine the acidity and alkalinity of the sample.
6 Preparation of sample solution
6.1 Washing away soluble salts
SY5395-91
Weigh 0.1g of sample (mudstone, oil and gas layer sandstone can weigh 1-~3g), accurate to 00001g, put it into a centrifuge, add 15ml 50% alcohol, stir with a glass to suspend for 5min, then rinse the glass ring and tube wall with 50% alcohol, centrifuge at 3300r/min for 15min, and discard the clear liquid. Repeat the sample washing once. 6.2 Ion exchange
Add 25mL of exchange solution (for alkaline positive, use pseudo exchange solution for neutral exchange solution, for acidic, use neutral exchange solution) into two centrifuge tubes, stir with a glass to suspend for 20min, then rinse the glass ring and tube wall with exchange solution, centrifuge at 3500-/min for 15min, and transfer the clear liquid into a two-cornered flask. Repeat the above operation for the sample in the centrifuge tube for 10 times. Transfer to the same conical flask. 6.3 Wash away the residual non-exchangeable ammonium ions
Add 15 ml of 95% alcohol to the centrifuge tube, stir evenly, wash the glass with 95% alcohol, separate it in a centrifuge at 3500//min for 15 minutes, and transfer the clear liquid to the conical flask in 6.2. Repeat the washing for 10 times, and transfer the clear liquid to the same conical flask, and keep the cation exchange liquid to be tested.
6.4 Replace the exchangeable ammonium ions
Add 25 mL of 0.5 mol/l potassium chloride exchange liquid to the centrifuge tube, stir until it is suspended for 20 minutes, separate it in a centrifuge at 3500r/rn for 15 minutes, and transfer the 1 layer of liquid to a 100 mL volumetric flask. Repeat the exchange once more, and transfer the clear liquid to the above 100 mL volumetric flask, make up to volume, and set aside evenly. Keep the cation exchange liquid to be tested. 7 Determination of cation exchange capacity
1. Draw a standard curve
According to Table 1, add 10mL of ammonium ion working solution to each sample, dilute to 8mL with water, add 0.2mL of Trast reagent, set the concentration, shake, wait for 10min, and measure the absorbance in a visible light spectrophotometer with a wavelength of 425mm and a ratio of 10mm. Draw a standard working curve with ammonium ion concentration as the horizontal axis and absorbance as the vertical axis, and calculate its slope tgα. Record 1
Test: Bottle number
7.2 Determination of clay cation exchange capacity
Ion standard working solution
Machine measurement bottle! Ammonium Absorbance
Take a certain volume of the test solution obtained in 6.4 into a 10ml volumetric flask, develop the color according to the operation steps in 7.1, measure the absorbance, and then calculate according to the formula given in 7.3.
7.3 Calculation formula for cation exchange capacity
mxMxxtge
Where: CEC-
SY 5395-—91
clay cation exchange capacity, mmo1/100gs-absorbance value
volume of test solution, mL,
-slope of standard working curve
-weight of sample, g
M-molar mass of ammonium ion, g/mol.
8 Determination of base content
8.1 Determination of base content of potassium, sodium, calcium and magnesium 8.1.1 Plotting standard working curve
Take 1, 2, 3, 4 and 5 mL of potassium, sodium, calcium and mixed standard working solution respectively, add them into 50 mL volumetric flasks respectively, add 1 mL of 1:1 hydrochloric acid solution and 5 mL of 10% strontium hydride solution respectively, make up to volume, shake the hook, use the reagent as reference, and measure the absorbance of each ionic liquid on an atomic absorption spectrophotometer using the determination conditions of potassium, sodium, calcium and magnesium respectively, plot the standard working curve with the ion concentration (mg/mL) as the horizontal axis and the absorbance as the vertical axis, and calculate the slope tgz of the working curve. 8.1.2 Determination of base content
Slowly simmer the solution in the three-flask obtained in 6.3 on an electric stove until it is almost dry, add 1mL of 1:1 hydrochloric acid solution to the conical flask to dissolve, and wash the evaporated matter in the conical flask into a 100mL volumetric flask, adjust to volume, and shake. Take a certain volume of solution and pour it into a 50mL volumetric flask, and add 1mL of 1:1 hydrochloric acid solution and 5mL of 10% strontium chloride solution at the same time, adjust to volume, shake, and measure the absorbance of potassium, sodium, calcium, and magnesium respectively on an atomic absorption spectrophotometer under the determination conditions of each ion. Calculate the base content according to the formula given in 8.1.3. 8.1.3 Formula for calculating the base component
E(Na)=
Fx5000
M(K)xVxm×tga
E×5000
M(Na)xVxmxtgu
E×5000
)xxmxtgu
Ex5000
XVxnxiga||tt ||Wherein: E(K), E(Na), E(Ca), E(Mg) - sodium, one-half calcium, one-half magnesium salt base, mnol/100g1
E——absorbance;
V---volume of the test solution taken, ml,
tga——slope of the standard working width line,
test weight,
M(K), M(Na), M(Ca), M(
8.2 Determination of base content of acidic sample
Molar mass of potassium, sodium, half calcium, half magnesium g/mol.
The base content of acidic sample contains hydrogen and aluminum in addition to potassium, sodium, calcium and magnesium. 8.2.1 Preparation of hydrogen-aluminum base content of test solution Weigh 0.5g of the acidic sample prepared in 5.1 and place it in a centrifuge tube, accurate to 0.0001g. Add 25ml. 0.5mol/l potassium fluoride 4
SY 5395—91
Braid the liquid, stir it with a glass rod until it is suspended, exchange for 20 minutes, rinse the glass rod with the exchange liquid, centrifuge at 3500r/min for 15 minutes, transfer the supernatant to a 100mL volumetric flask: add 0.5mol/L potassium chloride solution for exchange once, collect the supernatant in the above volumetric flask, make up to volume, shake and hook, this is the test solution of the hydrogen aluminum salt extraction amount. 8.2.2 Determination of exchangeable hydrogen aluminum content||tt ||Take 50mL of the above test solution and place it in a F250mL conical flask. Add 2 drops of phenolic acid indicator to the conical flask and titrate with 0.01mol/L sodium hydroxide standard solution until it just turns pink, that is, the end point. Note the volume of sodium hydroxide solution consumed and calculate the nitrogen and aluminum content according to the following formula: E(HA1)-x100.
Where: E(HA1)——hydrogen and aluminum content, mmol/100gc-——sodium hydroxide solution concentration, mo1/LV —Consumption of sodium hydroxide solution volume, n
-Test weight, g.
.8.2.3 Determination of exchangeable aluminum basic content
8.2.3.1 Drawing standard working curve
Take 0, 0.5, 1.0, 1.5, 2.0 mL of aluminum standard working solution and add them to 50 mL volumetric flasks respectively, then add 1 mL of 1:1 hydrochloric acid solution and 0.2 mL of 0.2% ascorbic acid solution and 0.5 mL of 1% Place the o-phenanthroline solution for 3-5 minutes, dilute it to about 35 mL with water, add 3 ml of mixed color developing solution and 5 ml of 13% hexamethylenetetramine solution respectively while shaking continuously, make up to volume, shake and develop the color for 30 minutes, and use a visible light spectrophotometer to measure the absorbance at a wavelength of 650 nm and a 0.5 cm colorimetric blood. Draw a standard working curve with aluminum ion concentration (mg/mL) as the horizontal coordinate and absorbance as the vertical coordinate, and calculate its slope tg. 8.2.3.2 Determination of exchangeable aluminum base content
Take a certain volume of the test solution prepared in 8.2.1, develop the color according to the operating steps in 8.2.3.1, and measure its absorbance. Calculate the aluminum base content by the following formula:
F×5000
mxtgaxM(A1)xv
Wherein: E(1-A1)—one-third—aluminum base content, mmo1/100gH—absorbance,
—one-third aluminum molar mass, g/mo
V—take Volume of the test solution, L:
tgα-aluminum standard working curve slope,
m——-sample weight, g.
8.2.3.3 Calculation of exchangeable hydrogen base content
F(H)=E(HA1)-F
Where: E(H)-chloride base content, mmol/100g. 9 Calculation of total base content
.9.1 Calculation of base content of alkaline and neutral samples ZE=F(K)+E(Na)+E(ICa)+F(})
Where: EE:-alkaline and neutral samples Base content, mmo1/100g. (7)
9.2 Calculate the total base content of the acidic sample
EE-E(K)+E(Na)+E
SY5395-91
Where: E. —Total base content of the acidic sample, mmol/100g10 Precision
Cation exchange capacity (CEC) determination precision table 2
10--30
Base content determination precision
10~～20
10.3 Total base type and Cation exchange capacity fit - E (HA)
Absolute supplementation
The maximum absolute deviation allowed between the total amount of base and the cation exchange capacity is 10mimol/100g. Additional remarks:
This standard was proposed and managed by the Shanshishan Geological Exploration Professional Standardization Committee. The standard was drafted by the Development Department of Daqing Petroleum Institute. The main drafters of this standard are Sun Weilin, Gong Tiejun, Zhao Li'an, Dang Qinggong, Long Anhou, and Sun Lian. 6
mmio1/100g
mno1/100g
This standard is still valid after the review in 199, and the review result has been approved by the State Administration of Petroleum and Chemical Industry.3Calculation formula of base component
E(Na)=
Fx5000
M(K)xVxm×tga
E×5000
M(Na)xVxmxtgu
E×5000
)xxmxtgu
Ex5000
XVxnxiga
Where: E(K), E(Na), E(Ca), E(Mg) - sodium, one-half calcium, one-half magnesium salt base, mnol/100g1
E——absorbance;
V---volume of the test solution taken, ml,
tga——slope of the standard working width line,
test weight,
M(K),M(Na), M(Ca), M(
8.2 Determination of base content of acidic sample
Molar mass of potassium, sodium, half calcium, half magnesium g/mol.
The base content of acidic sample contains hydrogen and aluminum in addition to potassium, sodium, calcium and magnesium. 8.2.1 Preparation of hydrogen-aluminum base content test solution Weigh 0.5g of the acidic sample prepared in 5.1 and place it in a centrifuge tube, accurate to 0.0001g. Add 25ml. 0.5mol/l potassium fluoride 4
SY 5395—91
Braid the liquid, stir it with a glass rod until it is suspended, exchange for 20 minutes, rinse the glass rod with the exchange liquid, centrifuge at 3500r/min for 15 minutes, transfer the supernatant to a 100mL volumetric flask: add 0.5mol/L potassium chloride solution for exchange once, collect the supernatant in the above volumetric flask, make up to volume, shake and hook, this is the test solution of the hydrogen aluminum salt extraction amount. 8.2.2 Determination of exchangeable hydrogen aluminum content||tt ||Take 50mL of the above test solution and place it in a F250mL conical flask. Add 2 drops of phenolic acid indicator to the conical flask and titrate with 0.01mol/L sodium hydroxide standard solution until it just turns pink, that is, the end point. Note the volume of sodium hydroxide solution consumed and calculate the nitrogen and aluminum content according to the following formula: E(HA1)-x100.
Where: E(HA1)——hydrogen and aluminum content, mmol/100gc-——sodium hydroxide solution concentration, mo1/LV —Consumption of sodium hydroxide solution volume, n
-Test weight, g.
.8.2.3 Determination of exchangeable aluminum basic content
8.2.3.1 Drawing standard working curve
Take 0, 0.5, 1.0, 1.5, 2.0mL of aluminum standard working solution and add them to 50mL volumetric flasks respectively, then add 1mL 1:1 hydrochloric acid solution and 0.2mL 0.2% ascorbic acid solution and 0.5mL 1% Place the o-phenanthroline solution for 3-5 minutes, dilute it with water to about 35 mL, add 3 ml of mixed color developing solution and 5 ml of 13% hexamethylenetetramine solution respectively while shaking continuously, make up to volume, shake and develop the color for 30 minutes, use a visible light spectrophotometer at a wavelength of 650 nml and a 0.5 cm colorimetric blood to measure the absorbance, draw a standard working curve with aluminum ion concentration (mg/mL) as the horizontal coordinate and absorbance as the vertical coordinate, and calculate its slope tg. 8.2.3.2 Determination of exchangeable aluminum base content
Take a certain volume of the test solution prepared in 8.2.1, develop the color according to the operating steps in 8.2.3.1, and measure its absorbance. Calculate the aluminum base content by the following formula:
F×5000
mxtgaxM(A1)xv
Wherein: E(1-A1)—one-third—aluminum base content, mmo1/100gH—absorbance,
—one-third aluminum molar mass, g/mo
V—take Volume of the test solution, L:
tgα-aluminum standard working curve slope,
m——-sample weight, g.
8.2.3.3 Calculation of exchangeable hydrogen base content
F(H)=E(HA1)-F
Where: E(H)-chloride base content, mmol/100g. 9 Calculation of total base content
.9.1 Calculation of base content of alkaline and neutral samples ZE=F(K)+E(Na)+E(ICa)+F(})
Where: EE:-alkaline and neutral samples Base content, mmo1/100g. (7)
9.2 Calculate the total base content of the acidic sample
EE-E(K)+E(Na)+E
SY5395-91
Where: E. —Total base content of the acidic sample, mmol/100g10 Precision
Cation exchange capacity (CEC) determination precision table 2
10--30
Base content determination precision
10~～20
10.3 Total base type and Cation exchange capacity fit - E (HA)
Absolute supplementation
The maximum absolute deviation allowed between the total amount of base and the cation exchange capacity is 10mimol/100g. Additional remarks:
This standard was proposed and managed by the Shanshishan Geological Exploration Professional Standardization Committee. The standard was drafted by the Development Department of Daqing Petroleum Institute. The main drafters of this standard are Sun Weilin, Gong Tiejun, Zhao Li'an, Dang Qinggong, Long Anhou, and Sun Lian. 6
mmio1/100g
mno1/100g
This standard is still valid after the review in 199, and the review result has been approved by the State Administration of Petroleum and Chemical Industry.3Calculation formula of base component
E(Na)=
Fx5000
M(K)xVxm×tga
E×5000
M(Na)xVxmxtgu
E×5000
)xxmxtgu
Ex5000
XVxnxiga
Where: E(K), E(Na), E(Ca), E(Mg) - sodium, one-half calcium, one-half magnesium salt base, mnol/100g1
E——absorbance;
V---volume of the test solution taken, ml,
tga——slope of the standard working width line,
test weight,
M(K),M(Na), M(Ca), M(
8.2 Determination of base content of acidic sample
Molar mass of potassium, sodium, half calcium, half magnesium g/mol.
The base content of acidic sample contains hydrogen and aluminum in addition to potassium, sodium, calcium and magnesium. 8.2.1 Preparation of hydrogen-aluminum base content of test solution Weigh 0.5g of the acidic sample prepared in 5.1 and place it in a centrifuge tube, accurate to 0.0001g. Add 25ml. 0.5mol/l potassium fluoride 4
SY 5395—91
Braid the liquid, stir it with a glass rod until it is suspended, exchange for 20 minutes, rinse the glass rod with the exchange liquid, centrifuge at 3500r/min for 15 minutes, transfer the supernatant to a 100mL volumetric flask: add 0.5mol/L potassium chloride solution for exchange once, collect the supernatant in the above volumetric flask, make up to volume, shake and hook, this is the test solution of the hydrogen aluminum salt extraction amount. 8.2.2 Determination of exchangeable hydrogen aluminum content||tt ||Take 50mL of the above test solution and place it in a F250mL conical flask. Add 2 drops of phenolic acid indicator to the conical flask and titrate with 0.01mol/L sodium hydroxide standard solution until it just turns pink, that is, the end point. Note the volume of sodium hydroxide solution consumed and calculate the nitrogen and aluminum content according to the following formula: E(HA1)-x100.
Where: E(HA1)——hydrogen and aluminum content, mmol/100gc-——sodium hydroxide solution concentration, mo1/LV —Consumption of sodium hydroxide solution volume, n
-Test weight, g.
.8.2.3 Determination of exchangeable aluminum basic content
8.2.3.1 Drawing standard working curve
Take 0, 0.5, 1.0, 1.5, 2.0 mL of aluminum standard working solution and add them to 50 mL volumetric flasks respectively, then add 1 mL of 1:1 hydrochloric acid solution and 0.2 mL of 0.2% ascorbic acid solution and 0.5 mL of 1% Place the o-phenanthroline solution for 3-5 minutes, dilute it to about 35 mL with water, add 3 ml of mixed color developing solution and 5 ml of 13% hexamethylenetetramine solution respectively while shaking continuously, make up to volume, shake and develop the color for 30 minutes, and use a visible light spectrophotometer to measure the absorbance at a wavelength of 650 nm and a 0.5 cm colorimetric blood. Draw a standard working curve with aluminum ion concentration (mg/mL) as the horizontal coordinate and absorbance as the vertical coordinate, and calculate its slope tg. 8.2.3.2 Determination of exchangeable aluminum base content
Take a certain volume of the test solution prepared in 8.2.1, develop the color according to the operating steps in 8.2.3.1, and measure its absorbance. Calculate the aluminum base content by the following formula:
F×5000
mxtgaxM(A1)xv
Wherein: E(1-A1)—one-third—aluminum base content, mmo1/100gH—absorbance,
—one-third aluminum molar mass, g/mo
V—take Volume of the test solution, L:
tgα-aluminum standard working curve slope,
m——-sample weight, g.
8.2.3.3 Calculation of exchangeable hydrogen base content
F(H)=E(HA1)-F
Where: E(H)-chloride base content, mmol/100g. 9 Calculation of total base content
.9.1 Calculation of base content of alkaline and neutral samples ZE=F(K)+E(Na)+E(ICa)+F(})
Where: EE:-alkaline and neutral samples Base content, mmo1/100g. (7)
9.2 Calculate the total base content of the acidic sample
EE-E(K)+E(Na)+E
SY5395-91
Where: E. —Total base content of the acidic sample, mmol/100g10 Precision
Cation exchange capacity (CEC) determination precision table 2
10--30
Base content determination precision
10~～20
10.3 Total base type and Cation exchange capacity fit - E (HA)
Absolute supplementation
The maximum absolute deviation allowed between the total amount of base and the cation exchange capacity is 10mimol/100g. Additional remarks:
This standard was proposed and managed by the Shanshishan Geological Exploration Professional Standardization Committee. The standard was drafted by the Development Department of Daqing Petroleum Institute. The main drafters of this standard are Sun Weilin, Gong Tiejun, Zhao Li'an, Dang Qinggong, Long Anhou, and Sun Lian. 6
mmio1/100g
mno1/100g
This standard is still valid after the review in 199, and the review result has been approved by the State Administration of Petroleum and Chemical Industry.2 Determination of exchangeable aluminum base content
Take a certain volume of the test solution prepared in 8.2.1, develop the color according to the operating steps in 8.2.3.1, and measure its absorbance. Calculate the aluminum base content by the following formula:
F×5000
mxtgaxM(A1)xv
Wherein: E(1-A1)—one-third—aluminum base content, mmo1/100gH—absorbance,
—one-third aluminum molar mass, g/mo
V—volume of the test solution Product, L:
tgα-aluminum standard working curve slope,
m——-sample weight, g.
8.2.3.3 Calculation of exchangeable hydrogen base content
F(H)=E(HA1)-F
Where: E(H)-chloride base content, mmol/100g. 9 Calculation of total base content
.9.1 Calculation of base content of alkaline and neutral samples ZE=F(K)+E(Na)+E(ICa)+F(})wwW.bzxz.Net
Where: EE:-base content of alkaline and neutral samples Quantity, mmol/100g. (7)
9.2 Calculate the total amount of base in the acidic sample
EE-E(K)+E(Na)+E
SY5395-91
Where: E. —Total amount of base in the acidic sample, mmol/100g10 Precision
Cation exchange capacity (CEC) determination precision table 2
10--30
Precision of base content determination results
10~～20
10.3 Total base type and cation exchange capacity (CEC) determination precision table 2
10--30
Precision of base content determination results
10~～20
10.3 Total base type and cation exchange capacity (CEC) determination precision table 2 Ion exchange capacity fit - E (HA)
Absolute supplementary
The maximum absolute deviation allowed between the total amount of base and the cation exchange capacity is 10mimol/100g. Additional remarks:
This standard was proposed and managed by the Shanshishan Geological Exploration Professional Standardization Committee. The standard was drafted by the Development Department of Daqing Petroleum Institute. The main drafters of this standard are Sun Weilin, Gong Tiejun, Zhao Li'an, Dang Qinggong, Long Anhou, and Sun Lian. 6
mmio1/100g
mno1/100g
This standard is still valid after the review in 199, and the review result has been approved by the State Administration of Petroleum and Chemical Industry.2 Determination of exchangeable aluminum base content
Take a certain volume of the test solution prepared in 8.2.1, develop the color according to the operating steps in 8.2.3.1, and measure its absorbance. Calculate the aluminum base content by the following formula:
F×5000
mxtgaxM(A1)xv
Wherein: E(1-A1)—one-third—aluminum base content, mmo1/100gH—absorbance,
—one-third aluminum molar mass, g/mo
V—volume of the test solution Product, L:
tgα-aluminum standard working curve slope,
m——-sample weight, g.
8.2.3.3 Calculation of exchangeable hydrogen base content
F(H)=E(HA1)-F
Where: E(H)-chloride base content, mmol/100g. 9 Calculation of total base content
.9.1 Calculation of base content of alkaline and neutral samples ZE=F(K)+E(Na)+E(ICa)+F(})
Where: EE:-base content of alkaline and neutral samples Quantity, mmol/100g. (7)
9.2 Calculate the total amount of base in the acidic sample
EE-E(K)+E(Na)+E
SY5395-91
Where: E. —Total amount of base in the acidic sample, mmol/100g10 Precision
Cation exchange capacity (CEC) determination precision table 2
10--30
Precision of base content determination results
10~～20
10.3 Total base type and cation exchange capacity (CEC) determination precision table 2
10--30
Precision of base content determination results
10~～20
10.3 Total base type and cation exchange capacity (CEC) determination precision table 2 Ion exchange capacity fit - E (HA)
Absolute supplementary
The maximum absolute deviation allowed between the total amount of base and the cation exchange capacity is 10mimol/100g. Additional remarks:
This standard was proposed and managed by the Shanshishan Geological Exploration Professional Standardization Committee. The standard was drafted by the Development Department of Daqing Petroleum Institute. The main drafters of this standard are Sun Weilin, Gong Tiejun, Zhao Li'an, Dang Qinggong, Long Anhou, and Sun Lian. 6
mmio1/100g
mno1/100g
This standard is still valid after the review in 199, and the review result has been approved by the State Administration of Petroleum and Chemical Industry.
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