GB/T 5401-2004 Determination of alkali solubility of pulp

This standard specifies the volumetric method for determining the alkali soluble components of pulp, which is applicable to various bleached pulps. This standard specifies a method for determining the alkali solubility of pulp using various fixed concentrations of cold sodium hydroxide solution, the sodium hydroxide concentration is usually 18% and 10% (mass fraction). This standard is mainly used for the study of bleached pulp, such as the study of the various stages of the manufacture of bleached pulp. However, this standard is also applicable to the study of unbleached pulp. GB/T 5401-2004 Determination of alkali solubility of pulp GB/T5401-2004 standard download decompression password: www.bzxz.net

[CS 85.040
National Standard of the People's Republic of China
CB/T5401—2004/IS0692.1982
On behalf of GB/T3401-18
Determination of alkali solubility
Pulps-Delermination of alkali solubility(10) 692:1982, Reapproved 1992, IDT) Issued on March 15, 2004
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China Kitchen Standard Management Committee
Implementation on 2D04-10-01
This standard is equivalent to ISO 592, 1482-Determination of alkali solubility GB/T 54012004/ISO 692:19a2
From the date of implementation of this standard, the main differences between this standard and GB/T3401-1S25 are as follows: Added "Standard for Use of Wood Rate" - added standard reference documents (this standard will add "Principle of Determination" - added "Precautions for Testing" - added "Test Notice" section; Appendix 8 of this standard is the information appendix:
This standard is proposed by China Light Industry Federation.
This standard is promoted by the National Paper Industry Standardization Committee and sponsored by China Paper Manufacturing Research Institute: The main authors of this standard are: An Chonggou, Du Liquid, Pan Xin: The previous versions of the standards represented by this standard are as follows: -tR/T 401—.aR5.
This standard is subject to the interpretation of the National Paper Industry Standardization Technical Committee. T
1 Specification
Determination of alkali solubility of pulp
GB/T5401—2004/1S0692:1982
This standard specifies the method for determining the solubility of paper by the method of volumetric method, and should be used for various white pulps. This standard specifies a method for determining the solubility of paper by using a fixed concentration of sodium hydroxide, the concentration of which should be: 3% and % (mass fraction). The standard is generally used for the study of flocculation resistance, such as the study of various stages of white pulp production, but this standard is also suitable for Research on unbleached pulp.
2 Normative references
The following clauses are used as the terms of this standard for the purposes of reference. For references with a sufficient date, all subsequent revisions (excluding discontinuation of errors) or discontinued versions are not applicable to this standard. For references without a sufficient date, the latest version is applicable to this standard. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest version of the following standards GB/T741 Pulp: Determination of moisture content in analytical samples (GB/T7412093.15) 6:8:1978, MO) 3 Terms and definitions
The following terms and definitions are included in this standard.
s-value s—Vnme
When discarded, the free part is expressed as a mass percentage of the absolute sample. 3. 2
5,S or -S10 r S
indicates the value of S, i.e. 18, 10 or c is the selected example, and is shown in grams of sodium dichromate in 100 ml of liquid. 4 Principle
Treat the paper with sodium hydroxide and oxidize the dissolved organic matter with dichromic acid to titrate the remaining potassium dichromate. The amount of the drug consumed is calculated based on the amount of the single fiber
5 Reagents
Unless otherwise specified, only reagents of confirmed analytical grade and water or deionized water or chemically pure materials are used in the analysis: 5.1 Oxidizing agent: For solutions of such concentration, the sodium dichromate content should be less than 1/L. For (5, H ± 0.63) mol/L solution, each 10 cg contains: 9.2 ± 0.1) g of oxidizing agent 1-1.1 u? 2g/m.) and each containing 2_5.1 per liter of sodium carbonate (2.77±.) l/1 drop per 1u of solution (10.3=1)& residual rate of sodium carbonate (p-1.189g/m.) per liter.
in: the method under the pressure of technology can be obtained. In the water of a small bullet disk of a hydrogen peroxide preparation device, the sodium carbonate suspended in the suspension sinks: the upper layer slides out, and the water without hydrogen peroxide can be diluted to form an appropriate maximum test. Then the standard collection of funds is determined: the liquid is calibrated to 5.2 bottles: change sulfuric acid, the filling concentration is not guaranteed to be less than 54% (part fraction: 1.84 points mL). Note: If the amount of sodium carbonate is 14% by volume), it cannot be close to the required calcium deficiency at 125℃. 30% 1
Fl/T 5451—2004/1S0 692:19825.3 chromium alkoxide solution, in 2.7\l/1 sulfuric acid concentration of 1:1, chromic acid concentration of 0.087ma1/1. In 1 liter of solution, there are 2.1v dichromium saddle group and 150m. system =.84x/ml. 3.5.4 sulfur waste sulfide dye: the liquid concentration is about 3.1mw!/. dark (the known concentration is accurate to 0.0002mol/L), each liter of solution contains industrial iron dumplings Hydrate FcS, NH>), T (] 10g\-41g and sulfur brand (e = 1.84g/mL) 10m, this liquid is unstable, so its concentration should be calibrated every day. In order to restore the required mass under the limit, the original reagent can be added to the tube, and the reduction and preparation conditions are obtained by washing with water (see 1) 56\, so that the liquid will pass through a hole with a size of: .4mm- 2.>mz. of the light 7. with alcohol to the body of the test, this metal can contain ten ml. can change the risk of X "by [N"; · El or oxidation and parts in the warehouse 5m. after washing to add this permanent gold disease, can industry fast should be left can be normal evaluation of crops through calibration, fruit magic single end position flow 10T. people to than 39.6% high aluminum K surrounding industry lack of lock with liquid law will always be constant, 5.5 phosphorus, 85% <volume =1.7cg/ml.) 5.E sub-aqueous indicator, each solution contains 0-10 spherical hydrate (C. T1, N., TI) 1g or 10-10 sulphuric acid hydrate [CH.N·HC·H. Q and vegetable acid sub-hydrate [Fe57H.] ?5.7 2-aqueous sodium ammonia solution indicator: Dissolve 0.1% sulphuric acid (CHuNSUa) in water and dilute to 100 ml.
-General experimental equipment and
6.! Stirring device: A stirrer made of stainless steel or other corrosion-resistant materials, adjust the blade angle to keep the air in the slurry for half an hour.
: Figure 1 shows that the horse is W, the delivery is 8 and 24=s. Unsmelted
Figure hungry mixed single set
-1 Iy) Eh.: 1ll? [ral s vt,Melnl wine. :st't. pe:lurated uelal alzte au eleelrolorrec, zheet—Ncm,Del sizcerf ue:nings
6.2 Machine warm water bath: with pain bottom (20=0.2) ℃ GB/T5401—2004/1S0692:19B2
6.3 Filter Rui or filter by: capacity is 5:1., made of alkali-resistant material car see [SO17S. The original hole of the bottom plate is P0 and is made of sintered continuous Rui plate.
.1 Absorption: pass through a slurry or a wave machine and then 6.5.
6.6 Reactor: volume is 200mJ high. 7 Preparation of sample
Take the pulp-free board of ordinary paper pulp and tear it into pieces of about mrm×mr. If the pulp is liquid pulp, dehydrate it by extraction method. Then put the sample between absorbent paper and press it, and dry it at the highest temperature. Before weighing, the sample is placed in the near-absorbent gas for at least 23mn
B Step
B.1 Sample
Take a sample equivalent to 1.=g and weigh it to 15. Then weigh two samples immediately and determine the average concentration of sodium ion (5.1100 ± 0.2) mL on the reaction plate (5.5) and place the reaction bottle in constant temperature water (5.2), adjust the temperature to (200.2) (Note 1). Put the clean sample into the sodium ion solution to make it swell for 2min and stir it in the reaction vessel for 3min or until the slurry is completely separated. Remove the stirrer from the reactor. When the stirrer is started, some fine fibers or sodium ion solution may remain on the stirrer. The reaction mixture is very low and the loss of efficiency is negligible.2) Keep the sample with sodium hydride on the surface of the paper for 6 hours, starting from the time of rolling. After that, add the total chemical solution with glass column, and under slight suction, pass the suspended liquid through the filter (S.3). At the same time, be careful to avoid air passing through. The starting rate of the method is 10ml.2mL~5umL. After the liquid is cooked, it will be discarded or burned. The potassium zinc acid solution can be washed with the filter for about 1 month. Use a pipette to transfer 10.0 mL of the reduced potassium solution (15.3) to the 25 mL flask, add 10.0 mL of the concentrated potassium solution (15.3) with a pipette, then carefully add 30 mL of concentrated sulfuric acid (5.2) under constant humidity, adjust the humidity to 125°C ~ = 30 and quickly heat this solution at room temperature, then cool the flask to room temperature until completely oxidized. According to the situation, the following is done: a) add 50% water into a cooling bottle and continue cooling, then add the indicator solution (52%), and add the newly determined ammonium ferric sulfate solution (1) to the solution: when the solution is about 1 nml, dilute the solution with water until the volume is about 1 nml. Add 5.5-5 ml of iodine acid, continue cooling, and quickly drop the newly determined ferric sulfate solution (1.1) onto the required amount of solution. Then transfer the concentrated solution (5.1) to the indicator solution, and immediately add the sodium disulfide solution (5.1). That is to say, the whole system titration is continued from deep visual color through purple to point through color as (who 1) with the selected currency hydrogen steel sample liquid to check the blank Wu adjustment, the whole should be flexible and use the same operation time for each sample extension should be sent out twice: bZxz.net
let 1 super strain change not affect 18 (mass fraction) heavy gasification requires silver trap wind, so under the energy level, avoid the need to provide poetry in (a 2, in the example (the benefit solution is slightly affected by the large medical ratio under low control) keep the temperature at 20.2
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GB/T5401-204/[S0692:1982
: Full force potential sample leaf row and 4 will measure the degree of electrical consultation. But the group to guard the collection is not complete, it can make the test position too low, the wind should be long picked and, until the test is completed, the gold is released as
. The box group is installed according to the effectiveness of the fixed: the flow rate is taken as 1》Ta1. If the product is installed in the reduced maintenance of the honest towel, the pressure is large (pressure volume note·
. Good, fill the sample volume and case to m. flow gland volume rate, to account for the solution of small (supply volume fraction), then make the filter 23. And sulphuric acid 5m.||tt ||When monitoring in a wide range of ways, the rate of sodium secretion and age control should be adjusted. In the limit of the amount of acid shrinkage, the indicator will be partially affected by the chemical reaction. This will not affect the sample volume of potassium phosphate. It is also necessary to change the starting point of the construction, etc. The chemical reaction is related to the relative number and concentration of the active part and the active indicator. Therefore, the acid should be used as soon as possible. The acid should be sounded at about - and the indicator will be effective immediately. If this effect is not completed, the error of the indicator can be ignored. The reading method of
5 can also be small, which should be stated in the experimental report. The oxygen water will reduce the cold economy Transfer to a bottle and keep warm to make the material dissolve evenly. Then check the AmimJ, the process of replacing the iodine (Ns:C) standard flow rate according to the specified time, add the iodine powder, and the process will be terminated when the color of the added body changes from dark to light color, and the clear color is reached. Then, the method of adjusting the volume and volume of the liquid is carried out according to the method described in 1. Calculate V, the V of the solution, and the net effect of the solution. 9 Expression of results
Typical methods and formulas
with mass percent The fraction represents the dissolved S, which can be calculated according to formula 1). V?x
VXcX-00X103
The volume of the titration liquid, in milliliters (ml): V-·The volume of the total volume of the titration test, in milliliters (ml); The concentration of the acid droplet, in milliliters (ml); The absolute test mass, in milliliters (ml);
i.——Experienced number. Indicates the amount of cellulose in mrl weight percent acid, in grams! (1)
: 1.1m3 of fiber system or its own interest. Generally, due to the tight limit of the new standard, the content of the chemical agent is smaller than the standard. In this method, the accuracy and the result of the two determinations should be within 1%, and the drug number S should be indicated. Note: The decimal point of the reported sales and non-technical chemical content is not consistent with the value measured by the method described in the formula, that is, the value obtained by the method described in the formula. The test report shall include the following items: Product identification materials: This standard: If the test rate is twice, the measurement should be stated: Test results: The test results can be observed in the clinical design: The results of the test can be indicated in the standard or normative document. The air-dried single-shot operation is carried out, and the absolute content of the obtained substance is calculated by the absolute amount of the sample (: Attachment A) (Information: The volume of the sample consumed in the test is the volume of the recovered solution consumed in the test) The volume of the recovered solution consumed in the test is the volume of the recovered solution (), the relative concentration of ferric sulfate solution) used for oxidation can be obtained: The actual package paint solution user drug solution: H/T 4u1-2004/1sO 692:1982 o. 10a 5 mnl/I. 11. 504 X -3
When monitoring the Guang style, the rate of sodium secretion and age control should be adopted. In the limit of the amount of acid, the indicator will be partially affected by the required chemical reaction. This will not affect the amount of potassium phosphate. It is also necessary to change the starting point of the construction, etc., and the chemical reaction is related to the relative number and concentration of the active part and the active part. Therefore, the acid should be used as soon as possible. The acid should be used at about - and the first acid sound should be used immediately. When the indicator is true, it can be effective. If there is no This is also the beginning of the completion of the setting effect. The error of the indication compensation can be ignored. The determination method should also be stated in the experimental report. The oxygen water will be transferred to the cold bottle to reduce the temperature. The material is kept at a low temperature to make it dissolve evenly. Then check AmimJ. The process is replaced by Iodine (Ns:C) according to the standard flow. The iodine is added according to the standard flow. When the color of the added body changes from dark to light color, the clear color is reached. The method of adjusting the volume of the sample solution is carried out according to the method described in 1, wherein V is the mass percentage of the dissolved S, which can be calculated according to the formula 1). =V - volume of the titration solution, in milliliters (ml); V - volume of the titration solution, in milliliters (ml); V - volume of the acid solution in the empty test tube ... Note: 1 point is not a decimal point in the reported sales volume, and the value measured by the method or method described in the technical specification shall be obtained.
1C test report
test authorization platform shall include the following items:
product identification materials:
this standard work:
if the test is taken twice, the measurement efficiency shall be stated: test results
the test can be carried out in the clinical observation plan:
the standard or normative document shall indicate the impact of the result on the combustion efficiency. The air-dried single-shot operation is carried out, and the absolute content of the obtained substance is calculated by the absolute amount of the sample (: Attachment A) (Information: The volume of the sample consumed in the test is the volume of the recovered solution consumed in the test) The volume of the recovered solution consumed in the test is the volume of the recovered solution (), the relative concentration of ferric sulfate solution) used for oxidation can be obtained: The actual package paint solution user drug solution: H/T 4u1-2004/1sO 692:1982 o. 10a 5 mnl/I. 11. 504 X -3
When monitoring the Guang style, the rate of sodium secretion and age control should be adopted. In the limit of the amount of acid, the indicator will be partially affected by the required chemical reaction. This will not affect the amount of potassium phosphate. It is also necessary to change the starting point of the construction, etc., and the chemical reaction is related to the relative number and concentration of the active part and the active part. Therefore, the acid should be used as soon as possible. The acid should be used at about - and the first acid sound should be used immediately. When the indicator is true, it can be effective. If there is no This is also the beginning of the completion of the setting effect. The error of the indication compensation can be ignored. The determination method should also be stated in the experimental report. The oxygen water will be transferred to the cold bottle to reduce the temperature. The material is kept at a low temperature to make it dissolve evenly. Then check AmimJ. The process is replaced by Iodine (Ns:C) according to the standard flow. The iodine is added according to the standard flow. When the color of the added body changes from dark to light color, the clear color is reached. The method of adjusting the volume of the sample solution is carried out according to the method described in 1, wherein V is the mass percentage of the dissolved S, which can be calculated according to the formula 1). =V - volume of the titration solution, in milliliters (ml); V - volume of the titration solution, in milliliters (ml); V - volume of the acid solution in the empty test tube ... Note: 1 point is not a decimal point in the reported sales volume, and the value measured by the method or method described in the technical specification shall be obtained.
1C test report
test authorization platform shall include the following items:
product identification materials:
this standard work:
if the test is taken twice, the measurement efficiency shall be stated: test results
the test can be carried out in the clinical observation plan:
the standard or normative document shall indicate the impact of the result on the combustion efficiency. The air-dried single-shot operation is carried out, and the absolute content of the obtained substance is calculated by the absolute amount of the sample (: Attachment A) (Information: The volume of the sample consumed in the test is the volume of the recovered solution consumed in the test) The volume of the recovered solution consumed in the test is the volume of the recovered solution (), the relative concentration of ferric sulfate solution) used for oxidation can be obtained: The actual package paint solution user drug solution: H/T 4u1-2004/1sO 692:1982 o. 10a 5 mnl/I. 11. 504 X -3
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