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Ketones Mix, Max. Diff. from Nom.:1.5% 5000 ?g/mL in MeOH:Water 9:1
GPC标样-聚乙烯醇缩丁醛(Mw 66500)(宽MWD) 标准品
莱菔子
4,4'-二氯二苯甲酮 标准品
Chromium - Cr metal as Cr+3, 99.999%, 2% HCl
Toxaphene Parlar-No. 44 ca.1 ?g/mL in Cyclohexane
p-Toyldisulfide
蜂蜜 氯霉素 甲硝唑 BQC1260147259H
棉隆溶液,100ppm
氨唑草酮 BePure-20217YB