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SN/T 4041-2014: Determination of fluoride and bromide content in foods for export - lon chromatography
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SN/T 4041-2014	English	189	Add to Cart	3 days [Need to translate]	Determination of fluoride and bromide content in foods for export - lon chromatography

SN/T 4041-2014: Determination of fluoride and bromide content in foods for export - lon chromatography

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(Food exports fluoride, bromide ion chromatography Determination) People's Republic of China Entry-Exit Inspection and Quarantine Standards Food exports fluoride, bromide Determination by ion chromatography Issued on. 2014-11-19 2015-05-01 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. People's Republic of China Hunan Exit Inspection and Quarantine, Shenzhen People's Republic of China Entry-Exit Inspection and Quarantine Bureau. The main drafters of this standard. Chen practice, Chenxin Huan, Zhang Zhirong, Mr Wong, Lin Yankui, Yangwan Biao, Lu small garden, Liu Zhenghua. Food exports fluoride, bromide Determination by ion chromatography

1 Scope

This standard specifies the ion chromatographic method tea, vegetables, fruits and other foods fluoride, bromide content. This standard applies to tea, vegetables, fruits and other foods fluoride, bromide content determination.

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

3 Method summary

Sample of fluoride, bromide extracted with potassium hydroxide solution, filtered, centrifuged, the supernatant aqueous pore through 0.22μm Filter through C18 cartridges to remove some impurities, ion chromatography fluoride, bromide ion, conductivity detector.

4 Reagents

Unless otherwise specified, the reagents were pure class distinctions, in line with the GB/T 6682 water requirements in a water. 4.1 potassium hydroxide. 4.2 acetonitrile. chromatography. 4.3 potassium hydroxide solution (100mmoL/L). Weigh potassium hydroxide (4.1) 5.611g in a plastic beaker, add appropriate amount of ultrapure water dissolved, Transfer to 1L plastic flask. Extract 4.4 Potassium hydroxide (5.0mmoL/L). exact Pipette 5.00mL potassium hydroxide solution (4.3) in a plastic 100mL volumetric flask, Plus ultra-pure water to volume, and mix. 4.5 Fluoride standard stock solution (1000μg/mL). buy certified standard solution or by GB/T 602 provisions prepared. 4.6 bromide ion standard stock solution (1000μg/mL). buy certified standard solution or by GB/T 602 provisions prepared. 4.7 C18 cartridge (3.0mL), before use sequentially with 10mL acetonitrile (4.2), 10mL of ultrapure water activation. 4.8 aqueous microporous membrane. 0.22μm. 5. Apparatus 5.1 Ion Chromatography. Electrical conductivity detector. 5.2 Analysis of balance. a sense of the amount of 1mg. 5.3 compactor. 5.4 constant temperature water bath. ...