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咪唑烷
First Standard® 喹烯酮
Purgeable Hydrocarbons and Aromatics Mixture - 601/602,624/1624 200ug/ml in Methanol
RICE FLOUR (amylose, high level) 标准品
First Standard® 氟吡甲禾灵
pH缓冲液 pH4.01(红)±0.01 @25°C
Methyl 10-undecenoate
Sodium p-n-undecylbenzenesulfonate
SUCCINYLACETONE (3,4,5,6,7-13C5, 99%)
NSI 饮用水QC样-农药 Pesticides