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First Standard® 啶蜱脲
Methylcyclohexane-d11 (ring-d11) 标准品
甲苯磺丁脲溶液, 100ppm
4-Acetyloxy Omeprazole Sulfide
N-Acetylneuraminic Acid Methyl Ester 2,4,7,8,9-Pentaacetate
91种农药及内标混标套装 BePure-31200XA-Kit
(-)-Enterodiol 标准品
SS EPA 524 VOC MIX A,5X1ML,MEOH,200UG/ML 标准品
丙酮中速灭威标准溶液
2,2'4,5,6'-Pentachlorobiphenyl (无证书)