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玫瑰红银试剂
甲基磺酸甲酯
PUNYW9879220 Norethisterone Impurity A
1H,1H,2H-全氟-1-十二烯
DROPPING FUNNELS, CYL., GRAD., 1000:20 ML, PRESSURE EQUAL., NEEDLE VALVE STOPCOCK, W. PTFE NEEDLE
29种元素ICP-MS混标,溶于5% HCl+1% HNO3
2,4,5-三叔丁基苯酚
电缆
5种元素ICP-MS标准溶液,As/Tl/Se/Cd/Pb,溶于5% HNO3
HyperSep C18 SPE Column 5g/25mL 20个/包装