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二溴羧基偶氮胂(DBC-AsA)是一种新显色剂,已用于铈的测定.本文研究了二溴羧基偶氮胂与锆的显色反应,并用于锆酸钙烧结物中微量锆的测定,结果令人满意.1试验部分1.1主要试剂锆标准溶液0.1mg·ml~(-1),准确称取二氧化锆0.1351g于瓷坩埚中,加焦硫酸钾4.0g,于750℃熔融10～15min,用盐酸(2mol·L~(-1))100ml浸出熔块,加热至完全溶解,移入1000ml量瓶中,以盐酸(2mol·L~(-1))稀释至刻度,摇匀.用时稀释至10μg·ml~(-1).
Dibromocarboxyarsenazo (DBC-AsA) is a new chromogenic reagent that has been used for the determination of cerium.In this paper, the color reaction of dibromocarboxyarsenazo with zirconium was studied and used in the calcination of calcium zirconate Determination of trace zirconium, the results are satisfactory.1 Experimental 1.1 The main reagent zirconium standard solution 0.1mg · ml -1, accurate weighed zirconium dioxide 0.1351g porcelain crucible, add potassium pyrosulfate 4.0g, at Melt at 750 ° C for 10-15 min, leach the frit with 100 ml of hydrochloric acid (2 mol·L -1), heat to completely dissolve, transfer to a 1000 ml volumetric flask and dilute to volume with hydrochloric acid (2 mol·L -1) , Shake well and dilute with time to 10μg · ml ~ (-1).