Determination of Heptachlor and DDT in Soiland Piatycodon Grandiflorum by Capillary Gas Chromatography

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[1]	WANG Tingxin,WANG Guangchong. Detection technology on the methenamine in Yuba by gas chromatography [J]. Journal of Hebei University (Natural Science Edition), 2013, 33(5): 477-483.
[2]	. Determination of Hexachloro-cyclohexane in Platycodon Grandiflorum by CGC [J]. Journal of Hebei University (Natural Science Edition), 2001, 21(4): 385-388.

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