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SN/T 4041-2014: Determination of fluoride and bromide content in foods for export - lon chromatography
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 4041-2014 | English | 189 |
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Determination of fluoride and bromide content in foods for export - lon chromatography
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SN/T 4041-2014
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Basic data | Standard ID | SN/T 4041-2014 (SN/T4041-2014) | | Description (Translated English) | Determination of fluoride and bromide content in foods for export - lon chromatography | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | X04 | | Classification of International Standard | 67.050 | | Word Count Estimation | 7,734 | | Date of Issue | 12/1/2014 | | Date of Implementation | 5/1/2015 | | Quoted Standard | GB/T 6682 | | Regulation (derived from) | State-Quality-Inspection-accreditation [2014] 614 | | Issuing agency(ies) | General Administration of Customs | | Summary | 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. | SN/T 4041-2014: Determination of fluoride and bromide content in foods for export - lon chromatography
---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.
(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.
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