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2.2'.3.4.5.5'.6-Heptachlorobiphenyl Solution 100ug/ml in Hexane (无证书)
18种有机氯混标
19种VOC混标(HJ 734-2014)
噻苯咪唑-5-羟基
Quality Control Standard (21) Matrix 4% HNO3 + Tr HF
Norethandrolone 标准品
Aflatoxin B1
4-(二乙基氨基)偶氮苯 标准品
A0406232 α-D-乳糖一水合物
Atrazine Solution in Acetonitrile