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2,2‘,4,6-四氯联苯 标准品
n-Nonadecane
S-Ethyl dipropylthiocarbamate Solution 100ug/ml in t-Butylmethyl ether
17,17-Dimethyl-18-norandrosta- 标准品
First Standard® 杀虫环草酸盐
LA Steel, Basic Open Hearth, 1% C
Mepiquat chloride
Etiocholanolone glucuronide, 1 标准品
Okadaic Acid, Ammonium Salt, >98%
K-252c, >99%