GB/T 30795-2014 English PDF

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GB/T 30795-2014: The test method of food detergents -- Determination of methanol
Status: Valid

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Basic data

Standard ID: GB/T 30795-2014 (GB/T30795-2014)
Description (Translated English): The test method of food detergents -- Determination of methanol
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y40
Classification of International Standard: 71.100.40
Word Count Estimation: 7,78
Date of Issue: 7/8/2014
Date of Implementation: 10/10/2014
Quoted Standard: 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 test methods for food methanol content was measured using detergents. This standard applies to the determination of food detergents methanol content, but also suitable for the determination detergents methanol content of non-fo

GB/T 30795-2014: The test method of food detergents -- Determination of methanol

---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 methanol ICS 71.100.40 Y40 National Standards of People's Republic of China Test methods for food use detergent Determination of Methanol Issued on. 2014-07-08 2014-10-10 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. Yan Fang, Qiang Peng Tao, Liang Hongyan, Gao Huan Quan. Test methods for food use detergent Determination of Methanol

1 Scope

This standard specifies the test methods for food methanol content was measured using detergents. This standard applies to the determination of food detergents methanol content, but also suitable for the determination detergents methanol content of non-food use. The standard detection limit of 1.2mg/kg, the lowest limit of quantification was 5mg/kg.

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 After pretreatment of the sample injection in gas chromatography, the components due to the different boiling points or polarity unlimited multiple suction in the column Attached, respectively, to obtain a resolved into the detector after the effective separation of content was calculated by the peak area of \u200b\u200beach component.

4 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical reagents and GB/T 6682 provisions tertiary water. 4.1 isopropanol, methanol-free should be verified before use under the same GC conditions. 4.2 anhydrous methanol. 4.3 methanol standard solution Weigh 10.0g of anhydrous methanol (weighing accuracy 0.001g) in 50mL beaker, add water, 20mL ~ 30mL, transferred to 1000mL capacity Flask with water to volume, and mix. 4.4 methanol standard solution (internal standard method) Pipette Pipette 10.0mL standard stock solution of methanol in 100mL flask with water to volume, and mix. Then pipette this rare Dilutions 10.0mL in 50mL beaker, accurate added 2.0mL isopropanol, followed by sufficient reserves to stir stoppered container. This standard solution The methanol concentration of 1mg/mL. NOTE. methanol solution reference standard stock index limited provisions formulated products, such as methanol standard Weigh 20.0g of anhydrous methanol when stock solution preparation, other Cheng Sequence remains unchanged, the methanol concentration with a standard solution should 2mg/mL. 4.5 methanol standard solution (external standard method) Pipette were pipetted 1.0mL, 2.5mL, 5.0mL, 10.0mL standard stock solution in methanol 50mL volumetric flask, washed with water Volume, and mix. The standard solutions of methanol concentration 0.2mg/mL, 0.5mg/mL, 1.0mg/mL, 2.0mg/mL. Respectively 1μL ~ 2μL standard solution into the chromatograph measured the peak area of \u200b\u200bthe vertical axis, the standard solution at abscissa curve. ......

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