热抽取法测定钴块中氢含量

研究了钴块中氢含量的测定方法。采用石英坩埚加载样品,热抽取法进行测定。不加任何助熔剂,分析功率为100%,匹配的分析时间为110 s,比较水平设定为0.1%。在选定的参数下,样品能在完全熔融状态下释放出全部氢。方法加标回收率为80%~119%,测定结果的相对标准偏差小于15%(n=6),检出限为0.5μg/g。热抽取法的精密度优于熔融法的精密度,满足微量气体分析的要求。

Determination of Hydrogen Content in Cobalt Pellets by Heat Extractive Method

The determination of hydrogen content in cobalt pellet was studied. The sample was loaded by quartz crucible, and detected by heat extractive method. Without aiding any solvent, the analytical power was 100%, the suited analytical time was 110 s and the comparative level was 0. 1%. Therefore hydrogen in sample could be released completely under the certain conditions. The recovery rate of the method was 80%-119%, the relative standard deviation of detection results was less than 15% （n=6）, and the detection limit was 0.5 μ g/g. The precision of heat extractive method was superrior to that of thermal method. The heat extractive method can meet the analysis requirement of trace gas in metals.