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SN/T 3931-2014 English PDF

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SN/T 3931-2014: Determination of formic acid and formate in export food by ion chromatography method
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PDF similar to SN/T 3931-2014


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Basic data

Standard ID SN/T 3931-2014 (SN/T3931-2014)
Description (Translated English) Determination of formic acid and formate in export food by ion chromatography method
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard X04
Classification of International Standard 67.050
Word Count Estimation 8,897
Date of Issue 4/9/2014
Date of Implementation 11/1/2014
Quoted Standard GB/T 6682-2008
Regulation (derived from) State inspection certification (2014) 210
Issuing agency(ies) General Administration of Customs
Summary This standard provides the food for export by ion chromatography method for the determination of formic acid and its salts. This standard applies to fruit juice, wine, determination of milk, fruit popsicles, ice cream, candy and cookies in formic acid and

SN/T 3931-2014: Determination of formic acid and formate in export food by ion chromatography method


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Determination of formic acid and formate in export food by ion chromatography method People's Republic of China Entry-Exit Inspection and Quarantine Standards Determination of food for export of formic acid and its salts Ion Chromatography Issued on. 2014-04-09 2014-11-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. Tianjin People's Republic of China Exit Inspection and Quarantine. The main drafters. Zhang Hua, Liu Yang, Chenqi Yong, Cui Ying, Zhao Ting, Wang Song, Wang Wei, Gebao Kun, Lin Anqing. Determination of food for export of formic acid and its salts Ion Chromatography

1 Scope

This standard provides the food for export by ion chromatography method for the determination of formic acid and its salts. This standard applies to fruit juice, wine, determination of milk, fruit popsicles, ice cream, candy and cookies in formic acid and its salts.

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 6682-2008 Analysis

3 Method summary

After the sample extract formate ion (HCOO-) by the water, the use of RP and Ag/H solid-phase extraction (SPE), and then potassium hydroxide solution Rinsing liquid, the anion exchange column, the conductivity detector. Retention time qualitative, external standard.

4 Reagents and materials

Unless otherwise indicated, the reagents used were of analytical grade water as a water GB/T 6682-2008 requirements. 4.1 Potassium hydroxide eluent. from automatic electrolytic eluent generator (or other automatically generated eluent device) or manually with the online generation Set potassium (or sodium) eluent. 4.2 acetonitrile. HPLC grade. 4.3 Methanol. HPLC grade. 4.4 Standard. sodium (Sodiumformate, CAS number. 141-53-7). Purity ≥99.0%. 4.5 HCOO- standard stock solution (1000mg/L). Weigh sodium standard (4.4) 1.511g, dissolved in high purity water and dilute to 1000mL, dubbed containing HCOO-1000mg/L standard stock solution was placed under a brown bottle 0 ℃ ~ 4 ℃ conditions can be stable for two months. 4.6 HCOO- standard dilutions (100mg/L). lessons HCOO- stock standard solution 10mL, with high water volume to 100mL, HCOO- a concentration of 100mg/kg. Preparation used. 4.7 HCOO- standard dilutions (10mg/L). lessons HCOO- stock standard solution 1mL, with high water volume to 100mL, HCOO- concentration of 10mg/kg. Preparation used. 4.8 HCOO- standard solution. as needed HCOO- standard dilutions (4.5 and 4.6) diluted to 0.05mg/L, 0.1mg/L, 0.2mg/L, 0.4mg/L, 0.6mg/L, 0.8mg/L, 1.0mg/L of standard solution. Preparation used. 4.9 Solid Phase Extraction (SPE) column. OnGuardⅡRP column (1.0mL), or equivalent person. Before using sequentially with 10mL of methanol, 15mL water By standing activation 30min. 4.10 Solid Phase Extraction (SPE) column. OnGuardⅡ Ag/H column (1.0mL), or equivalent person. 10mL water prior to use by, standing live Of 30min. 4.11 0.22μm microporous membrane. River.

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