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高纯镁砂中钙的分析对于钢铁工业的发展具有重要的意义.本文研究了用硫酸钙沉淀分离钙,间硝基偶氮氯膦(CPAmN)分光光度法测定高纯镁砂中钙的测试条件和具体方法,国内外未见报导.在本实验条件下测得钙与CPAmN络合物的摩尔吸光系数为1.0×10~4升·摩尔~(-1)·厘米~(-1)桑德尔灵敏度为0.00401微克钙·厘米~(-2).25毫升体积中,钙在0～50微克范围内都服从比尔定律.根据十次平行测定,计算得变异系数为0.83%.回收率在95～105%之间.用本法测定高纯镁砂中的钙,可获得满行结果.
The analysis of calcium in high-purity magnesia is of great significance to the development of the steel industry.In this paper, the test conditions and specific methods for the determination of calcium in high-purity magnesia by calcium sulfate precipitation-precipitation and m-nitro-chlorophosphonazo (CPAmN) spectrophotometry , No reports have been reported at home and abroad.The molar absorptivity of calcium and CPAmN complex measured in this experiment is 1.0 × 10-4 L · mol · cm -1 and the Sander sensitivity is 0.00401 Beer’s law is obeyed in the range of 0-50 micrograms of calcium in a volume of 25 micrograms of micrograms of calcium per milliliter.According to ten parallel determinations, the calculated coefficient of variation is 0.83%. The recovery is between 95 and 105% Room Determination of calcium in high-purity magnesia with this method can be obtained full line results.