GB 5009.15-2023 PDF English
US$140.00 · In stock · Download in 9 secondsGB 5009.15-2023: National food safety standard - Determination of cadmium in foods Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB 5009.15: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 5009.15-2023 | English | 140 |
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National food safety standard - Determination of cadmium in foods
| Valid |
| GB 5009.15-2014 | English | 80 |
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National Food Safety Standard -- Determination of Cadmium in food
| Obsolete |
| GB/T 5009.15-2003 | English | 399 |
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3 days
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Determination of cadmium in foods
| Obsolete |
| GB/T 5009.15-1996 | English | 279 |
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3 days
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Method for determination of cadmium in foods
| Obsolete |
| GB 5009.15-1985 | English | 199 |
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2 days
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Method for determination of cadmium in foods
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB 5009.15-2023
GB 5009.15-2023: National food safety standard - Determination of cadmium in foods---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB5009.15-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
National Food Safety Standard - Determination of Cadmium
in Foods
Issued on. SEPTEMBER 6, 2023
Implemented on. MARCH 6, 2024
Issued by. National Health Commission of the People’s Republic of China;
State Administration for Market Regulation.
Table of Contents
Foreword... 3
1 Scope... 4
Method 1 -- Graphite Furnace Atomic Absorption Spectrometry... 4
2 Principle... 4
3 Reagents and Materials... 4
4 Instruments and Equipment... 5
5 Analytical Procedures... 6
6 Expression of Analysis Results... 8
7 Precision... 9
8 Others... 9
Method 2 - Inductively Coupled Plasma Mass Spectrometry... 9
Appendix A Microwave Digestion Temperature Rise Program and Instrument
Reference Conditions of Graphite Furnace Atomic Absorption Spectrometry... 10
Foreword
This Standard serves as a replacement of GB 5009.15-2014 National Food Safety Standard -
Determination of Cadmium in Food.
In comparison with GB 5009.15-2014, the main changes are as follows.
---Method 2 “inductively coupled plasma mass spectrometry” is added;
---Appendix A “Microwave Digestion Temperature Rise Program and Instrument
Reference Conditions of Graphite Furnace Atomic Absorption Spectrometry” is added;
---Specimen preparation is modified;
---The wet digestion method, pressure tank digestion method and microwave digestion
method are modified, and the dry digestion method is deleted;
---The matrix modifier for graphite furnace atomic absorption spectrometry is modified.
National Food Safety Standard - Determination of Cadmium
in Foods
1 Scope
This Standard specifies the method for the determination of cadmium in foods by graphite
furnace atomic absorption spectrometry and inductively coupled plasma mass spectrometry.
This Standard is applicable to the determination of cadmium in foods.
Method 1 -- Graphite Furnace Atomic Absorption
Spectrometry
2 Principle
After the specimen is digested, atomize it in a graphite furnace, at 228.8 nm, determine the
absorbance. Within a certain concentration range, the absorbance value of cadmium is
proportional to the cadmium content. Conduct quantitative comparison with standard series
solutions.
3 Reagents and Materials
Unless it is otherwise specified, the reagents used in this Method are all excellent-grade pure,
and the water is Grade-2 water specified in GB/T 6682.
3.1 Reagents
3.2 Preparation of Reagents
3.3 Reference Material
Cadmium chloride (CdCl2 2.5H2O, CAS No.. 7790-78-5). purity > 99.99%, or a standard
substance certified by the state and awarded a reference material certificate.
3.4 Preparation of Standard Solutions
3.4.1 Cadmium standard stock solution (100 mg/L). accurately weigh-take 0.2032 g of
cadmium chloride, use a small amount of nitric acid solution (1 + 9) to dissolve it, transfer it
into a 1,000 mL volumetric flask. Add water to the scale and evenly mix it. The mass
concentration of cadmium in this solution is 100 mg/L.
3.4.2 Cadmium standard intermediate solution (100 g/L). accurately draw 1.00 mL of
cadmium standard stock solution (100 mg/L) into a 10 mL volumetric flask, add nitric acid
solution (5 + 95) to the scale, and evenly mix it.
3.4.3 Cadmium standard series of working solutions. respectively and accurately draw 0 mL,
0.200 mL, 0.500 mL, 1.00 mL, 2.00 mL and 4.00 mL of cadmium standard intermediate
solution (100 g/L) into a 100 mL volumetric flask.
4 Instruments and Equipment
NOTE. all glassware and polytetrafluoroethylene digestion inner tanks need to be soaked in nitric
acid solution (1 + 5) overnight, repeatedly rinsed with tap water, and finally, thoroughly
rinsed with water.
4.1 Atomic absorption spectrometer. equipped with graphite furnace atomizer and cadmium
hollow cathode lamp.
4.2 Electronic balance. with a division value of 0.1 mg and 1 mg.
5 Analytical Procedures
5.1 Specimen Preparation
5.1.1 Solid-state samples
5.1.2 Liquid samples
For samples, such as. soft drinks and condiments, etc., evenly shake them.
5.1.3 Semi-solid samples
Evenly mix them.
5.2 Test Conditions of the Method
5.2.1 Specimen pre-treatment
5.3 Reference Conditions of Instruments
See Table A.2 for instrument operating conditions.
5.4 Drawing of Standard Curve
In accordance with the mass concentration from low to high, respectively take 10 L of the
standard series of solutions and 5 L of the ammonium dihydrogen phosphate - palladium
nitrate mixed solution (select the optimal sample injection volume in accordance with the
instrument used), meanwhile, inject it into the graphite tube.
5.5 Determination of Specimen Solution
Under the same test conditions as the standard curve, draw 10 L of blank solution or specimen
digestion solution, and 5 L of the ammonium dihydrogen phosphate - palladium nitrate mixed
solution (select the optimal sample injection volume in accordance with the instrument used),
meanwhile, inject it into the graphite tube.
6 Expression of Analysis Results
The content of cadmium in the specimen is calculated in accordance with Formula (1).
7 Precision
When the cadmium content in the specimen is > 1 mg/kg (mg/L), the absolute difference
between the results of two independent determinations obtained under repeatability conditions
shall not exceed 10% of the arithmetic mean.
8 Others
When the sampling size is 0.5 g or 2 mL and the constant volume is 10 mL, the detection limit
of this Method is 0.002 mg/kg or 0.0005 mg/L, and the quantitation limit is 0.004 mg/kg or
0.001 mg/L.
Appendix A
Microwave Digestion Temperature Rise Program and Instrument
Reference Conditions of Graphite Furnace Atomic Absorption
Spectrometry
A.1 The microwave digestion temperature rise program is shown in Table A.1.
Table A.1 -- Microwave Digestion Temperature Rise Program
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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