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Heptachlor-endo-epoxide (trans-)
First Standard® 甲醇中氰氟草酸溶液,100μg/mL
Conventional Internal/Surrogate Std Evaluation Mix 标准品
(±)-α-Hydroxymetoprolol (unlabelled) 标准品
Montelukast R, R-Isomer 标准品
乙酸乙酯中马拉硫磷
正己烷中氰戊菊酯
2-Methyl-d3-3-butyn-1,1,1-d3-2-ol 标准品
pregnenoloen-d4
Single 15 EU PAHs, 200μg/mL each in toluene