GB/T 30797-2014 English PDF

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GB/T 30797-2014: The test method of food detergents -- Determination of total arsenic
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 30797-2014	279	Add to Cart	3 days	The test method of food detergents -- Determination of total arsenic	Valid

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Basic data

Standard ID: GB/T 30797-2014 (GB/T30797-2014)
Description (Translated English): The test method of food detergents -- Determination of total arsenic
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y40
Classification of International Standard: 71.100.40
Word Count Estimation: 12,193
Date of Issue: 7/8/2014
Date of Implementation: 11/1/2014
Quoted Standard: GB/T 5009.11-2003; GB/T 6682
Regulation (derived from): 2014 National Standards Bulletin No. 18
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the testing methods for food detergents total arsenic, ie hydride generation atomic absorption spectrometry, hydride generation atomic fluorescence spectrometry, arsenic and silver plaque assay method. This standard applies to food

GB/T 30797-2014: The test method of food detergents -- Determination of total arsenic

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
The test method of food detergents. Determination of total arsenic ICS 71.100.40 Y40 National Standards of People's Republic of China Test methods for food use detergent Determination of total arsenic Issued on. 2014-07-08 2014-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by China National Light Industry Council. This standard by the national food washed disinfection products Standardization Technical Committee (SAC/TC395) centralized. This standard was drafted. China Daily Chemical Industry Research Institute [National Cleaning Products Quality Supervision and Inspection Center (Taiyuan)], Xi'an opened meters shares Parts Ltd., Shijiazhuang Weina Bang Japan Ltd., surfactant and detergent industry Productivity Promotion Center. The main drafters of this standard. Yangming Ming, Yao Chen, the Hechun Liang, Liang Hongyan, Fan flat, strong Peng Tao, Zhao Yaxin Gong Zhipeng. Test methods for food use detergent Determination of total arsenic

1 Scope

This standard specifies the testing methods for food detergents total arsenic, ie hydride generation atomic absorption spectrometry, hydride generation atomic fluorescence Light method, silver and arsenic plaque assay method. This standard applies to food Determination of total arsenic in detergents, detergent is also suitable for the determination of total arsenic in the non-food use. Hydride Generation Atomic absorption spectrometry, hydride generation atomic fluorescence spectrometry, silver method is suitable for quantitative determination of total arsenic, arsenic spot method is suitable for the determination limit.

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. Determination of total arsenic and inorganic arsenic GB/T 5009.11-2003 Laboratory use specifications and test methods GB/T 6682 Analysis

3 The first method by hydride generation atomic absorption spectrometry

3.1 Principle After the pre-treated sample, the sample solution Arsenic under highly acidic conditions are thiourea - ascorbic acid reduction to trivalent arsenic, then borohydride Nascent hydrogen generated by the action of acid and potassium reduced to arsine arsine is introduced into the heated carrier gas "T" type quartz tube atomizer, arsenic is original Son of arsenic hollow cathode lamp emission characteristic lines. In a certain concentration range, the absorbance of the sample is proportional to the arsenic content. Compared with the standard series Compared quantitatively. If we take 1g sample, the method of detection was 0.075μg/g, the minimum detectable concentration was 0.25μg/g. 3.2 Reagents Unless otherwise indicated in the analysis using only recognized as analytical reagents and GB/T 6682 provisions tertiary water. 3.2.1 hydrochloric acid, pure class distinctions. 3.2.2 hydrochloric acid, 110 (volume ratio) solution. 3.2.3 nitrate, pure class distinctions. 3.2.4 sulfuric acid, pure class distinctions. 3.2.5 sulfate, 115 (volume ratio) solution. 3.2.6 Sodium hydroxide, 5g/L solution Weigh 0.5g of sodium hydroxide dissolved in 100mL of water. 3.2.7 hydroxide, 200g/L solution, weighed 200g sodium hydroxide were dissolved in 1L of water. 3.2.8 borohydride, potassium, 15g/L solution Weigh 1.5g of potassium borohydride were dissolved in 100mL of sodium hydroxide solution (3.2.6), filtered, and storage Stored in a plastic bottle, can be stored in the refrigerator for 1 week. 3.2.9 hydrogen peroxide, the mass fraction w (H2O2) = 30%. 3.2.10 thiourea - ascorbic acid solution, weighed 12.5g of thiourea [(NH2) 2CS], add 70mL water, dissolved by adding 2.5g ascorbic Acid, diluted to 100mL, stored in a brown bottle and can be stored in the refrigerator for 1 month. ......

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