Standard No.:	GB/T 5009.190-2006
Chinese Name:	食品中指示性多氯联苯含量的测定
English Name:	Determination of indicator polychlorinated biphenyls in foods
Professional Classification:	C53 Food sanitation
Professional Classification:	GB National Standard
ICS Classification:	67.040
Issued by:
Issued on:	2006-09-14
Implemented on:	2007-01-01
Status:	ABOLISHED
Replace:	GB/T5009.190-2003 Determination of polychlorobiphenyls (PCBs) in marine foods
Replace By:	GB5009.190-2014
Replace By Date:	2015-05-01
Language:	English
File Format:	PDF
Word Count:
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1. Scope

Method I in this standard specifies the determination methods for 20 species of indicator PCBs (including PCB28, PCB52, PCB101, PCB118, PCB138, PCB153 and PCB180) in foods specified in the Global Environmental Monitoring System/Food Planning Part (GEMS/Food). Method II specifies the determination methods of PCB28, PCB52, PCB101, PCB118, PCB138, PCB153 and PCB180 specified in GEMS/Food.
This standard is applicable to the determination of indicator PCBs in animal-based foods (like fish, shellfish, egg, meat and milk) and their products and oil and fat samples.
The quantification limit of each indicator PCBs in this standard is 0.5μg/kg.

Method I Stable Isotope Diluted Gas Chromatography-mass Spectrometry

2. Principle

Adopt stable isotope dilution technology; add 13C12 labeled PCBs in the sample as the quantitative standard; carry out Soxhlet extraction for 18~24h; carry out chromatography purification, separation and concentration for the extracted sample solution with column chromatography, and then add it into the internal recovery standard; adopt gas chromatography - low-resolution gas chromatograph-mass spectrometer, analyze through quadrupole mass spectrum selected ion monitoring (SIM) or ion trap tandem mass spectrum multi-response monitoring (MRM), and then quantify through internal standard method.