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TETRACHLOROBISPHENOL A (RING-13C12, 99%) 标准品
4-n-Nonylphenol-2,3,5,6-d4-OD
(24R)-24-Ethylcholest-2-ene
Strychnine 标准品
4-Hydroxy-2',3,5,5'-tetrachlorobiphenyl 标准品
Radon-222 Emanation Standard
(2-Chlorophenyl)diphenyl-d5-methanol 标准品
农残混标174
甲醇中培氟沙星-D5溶液标准物质 农科院质标所
氟苯脲