论文部分内容阅读
硫酸-氯化钠底液法测定矿石中的锡这一方法发表在《岩石矿物分析》一书已好几年了,但至今没有得到广泛采用,其原因可能有下列两方面:一是方法的结果偏低,二是其测量范围只适合0.1—10%锡的测定。本文讨论了偏低的原因及克服办法,在此基础上扩大了方法的可测范围,除对含铜>1%、含钼>2.5%的试样不适用外,含锡0.00x—xx%的试样均可测定。一、偏低的原因及克服办法1.由硫酸钠引起的系统偏低矿样经过氧化钠熔融、硫酸酸化后,生成了大量硫酸钠。硫酸钠的存在会降低峰电流,而在标准溶液中没有加入相应量的硫酸钠抵消其影响,因而造成约为5—7%的偏低(见表1)。克服办法是在标准中加入适当量的硫酸钠以互相抵消。
The method of sulfuric acid-sodium chloride bottom liquid determination of tin in ore has been published in “Rock and Mineral Analysis” book for several years, but has not been widely adopted for two reasons: First, the results of the method Low, and second, the measurement range is only suitable for 0.1-10% tin determination. This article discusses the reasons for low and overcome the method, based on which to expand the scope of the method can be measured, except for> 1% copper, molybdenum> 2.5% of the sample is not applicable, containing tin 0.00x-xx% Of the sample can be determined. First, the reasons for low and ways to overcome 1. Sodium Sulfate caused by the system of low mineral samples after melting sodium oxide, sulfuric acid acidification, the formation of a large number of sodium sulfate. The presence of sodium sulfate reduces the peak current, while the absence of sodium sulfate in the standard solution counteracts its effect, resulting in a low of about 5-7% (Table 1). The solution is to add an appropriate amount of sodium sulfate in the standard to offset each other.