a certificated lawyer
合格律师
a certificated lawyer
合格律师
The 2,6 dipicrylamino 3,5 dinitro pyridine(PYX)pureness reference material had been certificated by potentiometric method.
用电位滴定法对2,6-双(苦氨基)-3,5-二硝基吡啶(PYX)标准物质纯度进行测定。
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