This standard replaces "4.4 Ethylbenzene compounds" in GB/T 5009.98-2003 “Method for analysis of hygienic standard of unsaturated polyester resin and glass fiber reinforced plastics used as food containers and packaging materials” and “6 Styrene, ethylbenzene and other volatile components” in GB/T 5009.59-2003 “Analysis method for the hygiene standard of polystyrene resin for food packaging”.

Compared with “6 Styrene, ethylbenzene and other volatile components” in GB/T 5009.59-2003, the major changes of this standard are as follows:

——the name of this standard has been revised to “National food safety standard - Food contact materials and articles - Determination of styrene and ethylbenzene”;

——the type of chromatographic column has been revised;

——the method for determination of insoluble samples has been added