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本文采用L_(27)(3~(?))表正交设计试验证明了铅扣氧化温度和熔炼温度直接影响分析金银的精密度和准确度。经选择后的最优条件,分析方法成本低,速度快,结果令人满意。主要仪器和试剂高温箱式电阻炉,SX-10-14;可控硅温度控制器,KSY-12-16;电热恒温水温箱,S648,将电热丝改装成2.5瓩;灰皿,将猪骨灼烧至白色,碎成小于40目,加10—15％的水,与等量500°水泥混合成型;金标准溶液0.1000mg/mL;银粉99.999％。分析步骤称取氧化铅70g、硼砂20g、无水碳酸钠57g、二氧化硅7g、试样20～40g,按下列公式计算加入硝酸钾。
In this paper, L_ (27) (3 ~ (?)) Orthogonal design test proved that the lead and lead temperature and smelting temperature directly affect the precision and accuracy of gold and silver analysis. The selected optimal conditions, the method of analysis of low cost, fast, the results are satisfactory. Main instruments and reagents High-temperature box resistance furnace, SX-10-14; SCR temperature controller, KSY-12-16; electric heated water tank, S648, the heating wire converted into 2.5 瓩; Burn to white, broken into less than 40 mesh, add 10-15% of water, and the same amount of 500 ° C cement molding; gold standard solution 0.1000mg / mL; silver 99.999%. Analysis step Weigh lead oxide 70g, borax 20g, anhydrous sodium carbonate 57g, silica 7g, the sample 20 ~ 40g, according to the following formula to add potassium nitrate.