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由于原子吸收光谱仪性能的改善,噪声降低,精度提高,使高含量成份的分析成为可能。文献报道了原子吸收法测定高含量锌,但应用尚不普遍。本文制定了直接测定高含量铅锌的方法。实验表明,每毫升试验液中单独存在4毫克Cu~(2+)、Ni~(2+)、Fe~(3+);2毫克Mg~(2+);1毫克Al~(3+)、Ca~(2+)、SiO_2;0.4毫克K~+、Na~+0.2毫克Ba~(2+)、Mo~(6+)、Cd~(2+)、Cr~(6+)、W~(6+)、Sr~(2+)、Sn~(4+)、TiO_2、V~(5+)、Bi~(3+)、Mn~(2+)、Sb~(5+)、As~(5+)、Co~(2+);0.08毫克Ag~+;0.02毫克Au~(3+)时均不影响铅锌的测定。分析选矿产品中0.54—74%的铅和3.91—60.95%的锌,变异系数分别为1.65—0.41%及1.94—0.41%。用标准试样检查了方法的准确度,符合化学分析的误差要求。仪器与试剂自制YXF-79原子吸收光谱仪,带有PZ28-1型数字电压表显示读数;锌标准溶液:用高纯氧化锌配制成1毫升含0.5,1.0,2.0毫克的锌;铅标准溶液:用高纯铅配制成1毫升含5毫克铅,使用时再按需要进行稀释。
As atomic absorption spectrometer performance improvement, noise reduction, precision, so that the analysis of high content of ingredients possible. The literature reports the determination of high levels of zinc by atomic absorption spectrometry, but the application is not widespread. This paper developed a direct determination of high levels of lead and zinc. Experiments show that there are 4 mg Cu 2+, Ni 2+, Fe 3+, 2 mg Mg 2+, 1 mg Al 3+, , Ca 2+, SiO 2, 0.4 mg K +, Na + 0.2 mg Ba 2+, Mo 6+, Cd 2+, Cr 6+, W Sr 2+, Sn 4+, TiO 2, V 5+, Bi 3+, Mn 2+, Sb 5+, As ~ (5 +), Co ~ (2 +); 0.08 mg Ag ~ +; 0.02 mg Au ~ (3+) did not affect the determination of lead and zinc. Analysis of 0.54-74% lead and 3.91-60.95% zinc in the beneficiation products showed coefficients of variation of 1.65-0.41% and 1.94-0.41%, respectively. The accuracy of the method was checked with a standard sample and met the error requirements for chemical analysis. Instruments and Reagents Homemade YXF-79 atomic absorption spectrometer with PZ28-1 digital voltmeter to display readings; Zinc standard solution: 1 ml with high purity zinc oxide containing 0.5,1.0,2.0 mg of zinc; Lead standard solution: Prepare 1 ml with high purity lead containing 5 mg of lead and dilute as needed.