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呋喃西林 标准品
氯离子、溴离子、硝酸根、磷酸根、硫酸根 五种离子混标/阴离子混标
草枯醚
(S)-1-(4-Aminoxyacetamidobenzyl)ethylenediaminetetraacetic Acid
ACETYL-3-METHYLPYRAZINE, 2-(SG) 标准品
Phenylmercury salicylate Solution 100ug/ml in Toluene
PUNYW24703376 17-alpha-Dihydro Equilenin 17-Sulfate Sodium Salt
禾草敌
Benzo(a)pyrene solution 100ug/ml in Methanol
Cobalt - Co metal,99.998%,2% HCl(有证书)