高频燃烧红外吸收法测定铸铁中的高碳低硫

Determinations of high carbon and low sulfur contained in cast iron by high-frequency combustion infrared absorption method

采用高频燃烧红外吸收法可测定铸铁中的高碳低硫 ,测定条件为 :样品粒度小于0 .2 90 mm;助熔剂钨 1.5 g,铁 10 g;分析时间 C4 0 s,S30 s;称样量 C0 .2 g,S0 .5 g;比较水平 C 1% ,S 3% .本方法回收率大于 97.5 % ,标准偏差小于 0 .9% ,且分析手续简单。

High carbon and low sulfur contained in cast iron were determined by high\|frequency combustion infrared absorption method under the following conditions: the particle size of the sample was less than 0\^290 mm; 1\^5 g graned tungsten and 10 g grained iron were used as fluxes; for carbon analysis, the analysis time was 40 s, the weighed amount of sample was 0\^2 g and the comparison level was 1%; for sulfur analysis, the analysis time was 30 s, the weighed amount of sample was 0\^5 g and the comparison level was 3%. The method features simple analysis procedure and short flowsheet, providing a recovery over 97\^5% and the standard deviation less than 0\^9%.