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  • Title: [Study on certified reference material of benzene, toluene, o-xylene in charcoal].
    Author: Huang X, Wu W, Li Z.
    Journal: Wei Sheng Yan Jiu; 1998 Jul; 27(4):285-6. PubMed ID: 10682606.
    Abstract:
    This certified reference material (CRM) of benzene, toluene and o-xylene in charcoal is used for quility control and calibration of analytical instruments in the determination of benzene, toluene and o-xylene in air. Homogeneity of benzene, toluene and o-xylene concentrations in the CRM was testes by GC. The stability of the CRM was assessed for one year. The certified values are based on analysis made by a group of independent laboratoies using GC method.
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