GB/T 30799-2014The test method for safety of food detergents - Limit test for heavy metals (English PDF)
食品用洗涤剂试验方法 重金属的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 8, 2014
Implementation date
November 1, 2014
Scope
GB/T 30799-2014 is the English-translated version of 食品用洗涤剂试验方法 重金属的测定.
GB/T 30799-2014 is the Chinese standard "The test method for safety of food detergents - Limit test for heavy metals". Its scope clause reads: This standard specifies the test methods for food detergent Determination of Heavy Metal.
This standard applies to the determination of food detergents as Pb heavy metal, but also for non-food use detergent to lead in terms of the large amount of money Determination of the genus. Its clauses include reagents.
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Document preview — GB/T 30799-2014
National Standard of the People's Republic of China
- ICS
- 71.100.40
- Classification
- Y 40
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
1 Scope
This standard specifies the test methods for food detergent Determination of Heavy Metal.
This standard applies to the determination of food detergents as Pb heavy metal, but also for non-food use detergent to lead in terms of the large amount of money
Determination of the genus.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
Laboratory use specifications and test methods GB/T 6682 Analysis
Principle 3
Under weakly acidic (pH = 3 ~ 4) conditions, heavy metal ions in the sample generate dark brown substance and role of hydrogen sulfide, with the same treatment of
Comparison of lead standard solution, to do limited testing.
4 Reagents
Unless otherwise indicated in the analysis using only recognized as analytical reagents and GB/T 6682 provisions tertiary water.
4.1
hydrochloric acid.
4.2
hydrochloric acid, c (HCl) = 6mol/L, amount of 50mL of hydrochloric acid, dilute with water to 100mL.
4.3
hydrochloric acid, c (HCl) = 1mol/L, amount of 8.3mL of hydrochloric acid, dilute with water to 100mL.
4.4
nitrate.
Dilute nitric acid 4.5, 1% solution, take 1mL of nitric acid with water to 100mL.
4.6
sulfuric acid.
Hydrogen peroxide 4.7 mass fraction w (H2O2) = 30%.
4.8
phenolphthalein indicator, 1g/L ethanol solution, weighed 0.1g phenolphthalein dissolved 100mL95% ethanol.
4.9
ammonia, 12 (volume ratio) solution.
4.10
Glacial acetic acid, 6100 (volume ratio) solution.
4.11
glycerol.
4.12
sodium sulfide solution, 5g of sodium sulfide dissolved in 10mL water, and 30mL glycerol, shaken, into a brown bottle sealed, dark protection
Deposit, valid for one month.
4.13
lead nitrate, reference reagents.
4.14
lead standard solution, accurately weighed dried at 105 °C 2h or more of lead nitrate (4.13) 0.1598g, dissolved in nitric acid solution 10mL1%
The quantitative transferred to 100mL volumetric flask to volume with water, shake. Content solution 1mL lead to 1.0mg.
Note. also known concentrations of lead single element standard solution diluted directly formulated.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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