GB/T 5009.137-2003 Determination of antimony in food

This standard specifies the hydride atomic fluorescence spectrometry for the determination of antimony in food. This standard is applicable to the determination of antimony in various foods. The detection limit of this method is 0.1ng/mL. GB/T 5009.137-2003 Determination of antimony in food GB/T5009.137-2003 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
GB/T5009.137-—2003
Replaces GR/T16348—1996
Determination of antinrony in foods
Dctcromination of antinrony in foods2003-08-11Promulgated
Ministry of Health of the People's Republic of China
National Chemical Engineering Committee
Implementation on January 1, 2004
This standard replaces GB/T16348—1996. G8/T5009.137—2003
This standard is modified according to GE/T20001.42001 standard Part 4: Chemical analysis method. The standard is proposed by the Ministry of Health of the People's Republic of China, and the drafting units of this standard are Beijing Imported Food Health Supervision and Inspection Center, Beijing Food Hygiene and Epidemic Prevention Department, and the main drafting units of this standard are Ren Jun, Yang Lifen, Mao Hong, and Bang Hong. The original standard was issued in 1996. This standard is the first time to be issued. 193
GR/T 5009.137—2003
Some of the foods are contaminated by blood drawn from porcelain or made by the equipment, and the content of blood in food is relatively high. There have been cases of people being poisoned by drinking water made with saline in a container. The United States and other countries have set up quality standards for food. The United Kingdom stipulates that the amount of saline in beverages shall not exceed 5.15 mg/L, and the amount of saline in other foods shall not exceed 1.1 mg/kg. New Zealand stipulates that the amount of saline in beverages shall not exceed 0.15 mg/L, and the amount of saline in other foods shall not exceed 1.0 mg/kg. The United Kingdom stipulates that the amount of colorant in food shall not exceed 100 mg/kg. China stipulates that food containers and packaging materials shall be made of a total of two The product with diol ester of neutral acid as raw material, 4%2 night method is still commercial (60 seven, 9.5> neutral content shall not exceed (C5r/1-. In order to strengthen the food industry supervision, it is very necessary to set up a standard determination method for + cross energy 18t
Determination of acid in food
This standard specifies the atomic carbon optical spectrometry method of amides in food. This standard is suitable for the determination of various food novels. The limit of A point method is:,1n/rT.
2The most reasonable
GH/T 5009.137—2003
The sample is digested with acid. In a reactive medium, the sample reacts with sodium hydride (BH2O) or potassium hydride (KRH1) to generate reactive hydride (S6H2O) with argon as the consumption gas. The hydride is introduced into a self-heating atomizer for atomization. Under the irradiation of a special hollow cathode lamp, the atom is converted to high energy and then to the ground state. A special long fluorescence is emitted, and its fluorescence intensity is proportional to that of the standard series. 3 Trial preparation
3.1 Nitric acid + high chlorine gas: 400ml, high chlorine gas 100ml. Stir. 3.2 Dissolve fully (1) 250m250 water 3.3 sulfuric acid (super pure! :
3.430% overload hydrogen hydride,
3.5 pulse [(NHS2g/1 change chemical year K110G/I mixed liquid: take 2 environment record 1D head chemical evaluation, fall in,
3.6 chemical solution (NaH2O/teaching take 1 chemical solution in Cm oxygen regeneration solution (2) Zhongfu for, clinical use now,
3.7, micro comprehensive standard reserve broken (1.m/work): provided by the National Standard Material Research and Development Center. 3.8 Korean standard wave (1.m.): accurate hope to take Di standard storage wave (. certificate/ml.. currency water medical grade crushed to 1. 00 μg/ml..
4 Only Cui
Huanwu atomic force spectrometer,
4.2 Hollow Lang forging lamp,
4.3 Microwave digestion furnace,
4.4 Electric hot plate:
5 Analysis step
5. 1. Digestion: weigh 0.20g~2.(0g of the sample. 2.00g~t0.(0g of the liquid sample (or mE>. Place in T53mL.-1ccml with chemical volume (dimensional), add acid + perhydrogen acid (4+1) 5mL--10mL and then add acid 1mL~2. Soak overnight: put on the electric heating plate and heat until the digestion product is slightly colored or without color. If the color is darker during the digestion process, add nitric acid and continue to digest), add ml. water: continue heating to speed up the digestion (ml.~1.1, cool the plate and add less water to 21 minutes of hydrochloric acid 1. Magnetize 0
liquid 2. Dissolve in water to the scale, mix well, and let it stand for 303m before it is fully settled. The same reagent is convex 135
GB/T 5009.137—203
5. 1. 2 Micro-excitation digestion
Take the sample and digest it in a micro-excitation digestion box for 1m-2. Place the digester in a micro-excitation digestion furnace. Generally, the test sample is not suitable for testing. Set the maximum analytical parameters of the micro-excitation digestion furnace (see Table 1 and Table 2). After digestion is complete, take a sample from the digestion cup, transfer the clear liquid into a 25m3 plate with oliguria, add 2.0mL of natural aldehyde (111), dilute with water until the content is 2.1ml (20g/L) + 1002/1.0g/L), and adjust the content to the minimum concentration of 1ml with water. The sample can be determined to have a lower content of 10ml. According to the spoon, the effect is measured after 30min. Do reagent blank test at intervals, wife 1 sugar food, vegetables, fish C
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5. 2 brown standard series egg
Table 2 Oils and fats, sugars
Take 25mL of the customer volume, 7. Accurately add the standard air filter (3.00p/mL>0.00, 0.05, 0.10, 0.25, 0.501.i0, 1.502a2L of Le Shao Cao water, then add Meng Xing <11) 2.0mL. Sulfur (20g/L) + physical and chemical class (10C5/standard solution 2.L water sample to the scale, according to the package, (when the Jin swelling degree is 0.0 0, 2.00. 4.00. 10.00, 20.00, 4.00, 0.0/>Put it in and wait for test.
5.3.1 Receiver Operator Parts
Load: 320V:
With hollow light lamp Current: 50mA
Atomizer: Disc 650. Sheath 8mm
Gas flow rate: carrier gas 00ml/min;
Breath hold 1 mL/mini
Reducing agent time: 7.44 hours, 12.C5: delay time, 005 reading method: volume: standard method; sample injection details.ml.5.3.2 rolling measurement method
Set the instrument to the maximum temperature, after heating, adjust 10mim.2mn to increase the amount, select the zero tube of the standard series, after the reading is stable, switch to the standard system measurement, draw the standard Also micro. , enter the sample group, the test bomb and the sample digestion liquid, each sample needs to be cleaned and selected. The test results are calculated according to the following formula. 5. 3 Instrument sound dynamic calculation result measurement method to adjust the instrument to the best conditions, in the test parameters and the following parameters: sample volume (g or mL), required volume (ml), and 1Be
8/15009.137--2003
Result The unit of increase, the temperature will be required for the standard, the later stage: quickly use the standard series to select samples, after the number is stable, switch to the standard series, start making the standard line: before switching to the test column measurement, you can enter the blank value plate decision, use the test strip to select the liquid, let the instrument take the average value as the blank stop, then you can restore the sample melting, carry the "print" to print the determination results,
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The content of chlorinated compounds in the sample is expressed in whole grams per thousand shells (mg/kg(ng/L); 2. For the test sample, the unit is gram per liter (mg/kg(ng/L); 3. For the blank solution, the unit is nanogram per liter (ng/ml.); 4. For the sample volume, the unit is gram.
The total volume of the sample is expressed in liters (J). 7. The precision
The range of the difference between two independent determinations under the same conditions shall not exceed 0% of the arithmetic mean. 187
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