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异丙草胺溶液,100ppm
HJ 642-2013 35种VOC混标
First Standard® 甲醇中三氯杀螨醇溶液, 100μg/mL
异丙基苯/茴香素
1-Bromo-2-chloroethane
Chromium (VI) trioxide
溴螨酯标准溶液
4-Methylsulfonyl-2,2',4',5,6'-pentachlorobiphenyl 标准品
水质标样-甲醇中10种挥发性有机物混合(I)
o-Tolualdehyde (DNPH Derivative) Solution 100ug/ml in Acetonitrile