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GB/T 22325-2008 English PDF

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GB/T 22325-2008: Determination of benzoyl peroxide in wheat flour -- High performance liquid chromatography
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GB/T 22325-2008English169 Add to Cart 3 days [Need to translate] Determination of benzoyl peroxide in wheat flour -- High performance liquid chromatography Valid GB/T 22325-2008

PDF similar to GB/T 22325-2008


Standard similar to GB/T 22325-2008

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Basic data

Standard ID GB/T 22325-2008 (GB/T22325-2008)
Description (Translated English) Determination of benzoyl peroxide in wheat flour -- High performance liquid chromatography
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard X04
Classification of International Standard 67.050
Word Count Estimation 7,783
Date of Issue 2008-08-22
Date of Implementation 2008-12-01
Quoted Standard GB/T 6379.2; GB/T 6682
Regulation (derived from) National Standard Approval Announcement 2008 No.14 (Total No.127)
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 provides high-performance liquid chromatographic determination of benzoyl peroxide in wheat flour content of the principle, reagents and materials, equipment, analysis step, calculation methods and precision. This standard applies to the determination of wheat flour content of benzoyl peroxide. This standard minimum detection limit of 0. 5 mg/kg.

GB/T 22325-2008: Determination of benzoyl peroxide in wheat flour -- High performance liquid chromatography


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Determination of benzoyl peroxide in wheat flour. High performance liquid chromatography ICS 67.050 X04 National Standards of People's Republic of China Determination of benzoyl peroxide in wheat flour had High Performance Liquid Chromatography Posted 2008-08-22 2008-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

Appendix A of this standard is an informative annex. The standard proposed by the National Food Authority. This standard by the National Standardization Technical Committee OILS. This standard was drafted. National Standards and Monitoring Center for Agricultural Research (Heilongjiang). Drafters of this standard. mongolica Li Guangyu, Syria Wu Geng, Wang Zhiqiang, Jiang held Juan Liu, Jiang Wen, Chen Lihua, Wang Shikun, Cao Fucheng, Solutions for the new week, Lu hole descent. Determination of benzoyl peroxide in wheat flour had High Performance Liquid Chromatography

1 Scope

This standard specifies the wheat flour with high performance liquid chromatography benzoyl peroxide content of the principles, materials and reagents, equipment, points Step analysis, calculation method and precision. This standard applies to wheat flour in the determination of the content of benzoyl peroxide. The standard minimum detection limit of 0.5mg/kg.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the standard measurement repeatability And reproducibility of the basic method (GB/T 6379.2-2004, ISO 5725-2.1994, IDT) GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) Principle 3 From the methanol extract of benzoyl peroxide, potassium iodide as a reducing agent to restore it as benzoic acid, high performance liquid chromatography in 230nm under test.

4 Reagents and materials

This standard reagents used, unless otherwise stated, all analytical reagents, test water should meet the requirements of a water GB/T 6682 regulations. 4.1 Methanol. chromatographically pure. 4.2 KI solution. an aqueous solution of 50% (mass concentration). 4.3 benzoic acid. purity ≥99.9%, national standard. 4.4 ammonium acetate buffer solution (0.02mol/L). Weigh 1.54g ammonium acetate dissolved in water and diluted to 1L, after mixing with the 0.45μm After membrane filtration use. 4.5 benzoic acid standard stock solution (1mg/mL). Weigh 0.1g (accurate to 0.0001g) benzoic acid, diluted to 100mL with methanol.

5 Equipment

5.1 High performance liquid chromatograph. equipped with a UV detector; Column. C18 reverse phase column. 5.2 Balance. a sense of the amount of 0.0001g. 5.3 vortex mixer. 5.4 solvent filter. Step 6 Analysis 6.1 Preparation of samples Weigh sample 5g (accurate to 0.1mg) plug colorimetric tube, add 10.0mL of methanol in a vortex mixer to mix with 50mL

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