Standard No.:	GB/T 5009.36-2003
Chinese Name:	粮食卫生标准的分析方法
English Name:	Method for analysis of hygienic standard of grains
Professional Classification:	C53 Food sanitation
Professional Classification:	GB National Standard
ICS Classification:	67.040
Issued by:
Issued on:	2003-08-11
Implemented on:	2004-01-01
Status:	VALID
Replace By:	4.4GB5009.36-2016
Replace By Date:
Language:	English
File Format:	PDF
Word Count:	8500 words
Price(USD):	255 (USD)
Delivery:	via email in 1-3 business day

1 Scope

This standard specifies method for analysis of various hygienic indexes of unprocessed grain and processed grain.

This standard is applicable to the analysis of the hygienic indexes of malathion, phorate, fenitrothion, fenthion, DDVP, dimethoate, parathion, phosphide, cyanide, chloropicrin, carbon disulfide, arsenic, mercury, HCH, DDT, aflatoxin B1, cadmium, fluorine, stramonium seed, ergot, ethylene dibromide, heptachlor, aldrin, dieldrin, etc. in unprocessed grain and processed grain.

2 Normative References

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.

GB/T 5009.11 Determination of Total Arsenic and Abio-arsenic in Food

GB/T 5009.15 Determination of Cadmium in Foods

GB/T 5009.17 Determination of Total Mercury and Organic-mercury in Foods

GB/T 5009.18 Determination of Fluorine in Foods

GB/T 5009.19 Determination of HCH and DDT Residues in Foods

GB/T 5009.20 Determination of Organophosphorous Pesticide Residues in Foods

GB/T 5009.22 Determination of Aflatoxin B1 in Foods

3 Organoleptic Inspection

The grains shall possess color, luster and smell as that of the normal ones, without mould and deterioration.

4 Physical and Chemical Inspection

4.1 Malathion

4.1.1 Gas chromatography

Operate according to GB/T 5009.20.

4.1.2 Cu-complex compound colorimetry

4.1.2.1 Theory

Extract the malathion with organic solvent, hydrolyze it with sodium hydroxide during which process dimethyl phosphorodithioate is generated to react with copper salt to generate yellow complex. Carry out quantative determination by comparing with standard series.

In this method, the detection limit is 1.25 mg/kg if the sampling amount is 20g.