GB/T 22288-2008 in English

VALID

Determination of melamine ammeline ammelide and cyanuric acid in original plant products - GC-MS method

Issued on:2008-08-12
Implemented on:2008-12-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $120.00
$117.00

Standard No:	GB/T 22288-2008
Document status:	VALID
Title in English:	Determination of melamine ammeline ammelide and cyanuric acid in original plant products - GC-MS method
Title in Chinese:	植物源产品中三聚氰胺、三聚氰酸一酰胺、三聚氰酸二酰胺和三聚氰酸的测定气相色谱-质谱法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2008-08-12
Implemented on:	2008-12-01
ICS Classification:	67.120-Meat, meat products and other animal produce
Chinese Classification:	X04-Basic standards and general methods
Professional Classification:	GB-National Standard
Related Keywords:	cyanuric acid cyanuric acid annex b melamine ammeline ammelide original plant products gc-ms method
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《GB/T 22288-2008植物源产品中三聚氰胺、三聚氰酸一酰胺、三聚氰酸二酰胺和三聚氰酸的测定气相色谱-质谱法》由424-cnca（国家认证认可监督管理委员会）归口，主管部门为国家市场监督管理总局。
本标准规定了植物源产品中三聚氰胺、三聚氰酸一酰胺、三聚氰酸二酰胺和三聚氰酸
测定的气相色谱/质谱检测方法。本标准适用于小麦粉、玉米粉、大米粉中三聚氰胺、三聚氰酸一酰胺、三聚氰酸二酰胺和三聚氰酸含量的测定。

1 Scope

This standard specifies the GC-MS method for the determination of melamine, ammelide, ammelide and cyanuric acid in original plant products.

It is applicable to the determination of melamine, ammeline, ammelide and cyanuric acid in wheat flour, corn flour and rice flour.

2 Principle

The sample is extracted with a solvent, and the extracting solution is concentrated by a nitrogen blowing instrument and then derived with a silylating reagent. The melamine, ammeline, ammelide and cyanuric acid are detected and confirmed by GC-MS in the selected ion monitoring mode, and quantified by the external standard method.

3 Reagents and materials

Unless otherwise specified, all reagents used are analytical reagent and the water is distilled water or water with equivalent purity.

3.1 Diethylamine

3.2 Acetonitrile: chromatographically pure.

3.3 Pyridine: purity ≥99%.

3.4 Silylating reagent: N, O-bis (trimethylsilyl) trifluoroacetamide (BSTFA) containing 1% trimethyl chlorosilane (TMCS).

3.5 Extracting solvent: diethylamine - water - acetonitrile (10+40+50, volume ratio).

3.6 Melamine: purity ≥99.0%, CAS No.: 108-78-1.

3.7 Ammeline: purity ≥99.0%, CAS No.: 645-93-2.

3.8 Ammelide: purity ≥99.5%, CAS No.: 645-92-1.

Foreword i
1 Scope
2 Principle
3 Reagents and materials
4 Instruments and apparatus
5 Specimen preparation and preservation
6 Analytical procedures
7 Calculation of results
8 Determination lower limit
9 Recovery rate and precision
Annex A (Informative) Retention time, selection of monitoring ions and relative abundance of melamine, ammelide, ammeline and cyanuric acid
Annex B (Informative) Total ion chromatogram of derivatives of melamine, ammelide, ammeline and cyanuric acid and mass spectrum of each derivative in full scan mode
Annex C (Informative) Added recovery and precision of melamine, ammelide, ammeline and cyanuric acid in wheat flour, corn flour and rice flour