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本文提出对二甲苯低温氧化反应液(冰醋酸介质)中二价和三价钴测定方法。以 EDTA 络合滴定测定总钴量。采用硫酸高铈溶液为滴定剂,邻菲罗啉溶液为络合剂,铂、甘汞电极对电位滴定测定二价钴。由总钴与二份钴的差值,计算出三价钴的含量。
This paper presents a method for the determination of divalent and trivalent cobalt in the low temperature oxidation reaction solution of xylene (acetic acid medium). Total EDTA was determined by EDTA complexometric titration. Cerium sulfate solution as titrant, phenanthroline solution as complexing agent, platinum, calomel electrode potential titration determination of bivalent cobalt. From the total cobalt and two cobalt difference, calculate the content of trivalent cobalt.