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镍钨钙合金是电子管中的阴极材料,合金中钙的含量高低,对电子发射性能有一定的影响。我们用新显色剂间磺酸基偶氮安替比林(An)对镍钨钙合金中钙的测定进行了研究,基体镍和钨及杂质离子,用铜试剂进行分离,然后显色。经合成试样和试样的测定都获得满意结果。实验部分一试剂 0.08%间磺酸基偶氮安替比林显色溶液钙标准溶液:10μg ml~(-1) 二实验方法吸取一定量的钙标准溶液于25ml量瓶中,加入氢
Nickel tungsten calcium alloy tube is the cathode material, the level of calcium in the alloy, the electron emission performance has a certain impact. We studied the determination of calcium in the nickel-tungsten-tungsten-calcium alloy with a new chromogenic reagent sulfonic-acid-azoantipyrine (An), and the matrix nickel and tungsten and impurity ions were separated by a copper reagent and then developed. After the synthesis of samples and samples were measured satisfactory results. Experimental part of a reagent 0.08% of the sulfonic acid azoantipyrine color solution calcium standard solution: 10μg ml ~ (-1) two experimental methods to draw a certain amount of calcium standard solution in a 25ml volumetric flask, add hydrogen