2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚分光光度法测定原油及环烷酸钴中钴
2-(5-추-2-필정우담)-5-이을안기분분분광광도법측정원유급배완산고중고
Spectrophotometric determination of cobalt in crude oil and cobalt naphthenate with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol
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