瞬发伽马中子活化分析法与库伦滴定法测定煤中全硫含量的对比研究

Comparative study on results of determination of total sulfur in coal obtained by prompt gamma neutron activation analysis method and Coulometric Titration method

鉴于全硫含量检测结果的准确性和时效性对于生产过程智能控制的重要性,为评估瞬发伽马中子活化分析法(PGNAA)和库伦滴定法(CMT)测量全硫含量的准确性,以选煤厂入仓原煤为试验煤样,采用双因素法对两种测定方法进行研究。研究结果表明:PGNAA和CMT对样品的测量标准差分别为0.018%和0.042%;与CMT相比,PGNAA在检测结果的准确性、时效性方面均有较大的优势。

The accuracy and timeliness of total sulfur determination result are of vital importance for intelligent control of production process.For evaluating the accuracy of total sulfur determinations by prompt gamma neutron activation analysis(PGNAA)method and coulometric titration method(CTM),a study is made on the measuring accuracy of each method using bifactor method with the bunkered raw coal of a coal preparation plant as test sample.Study result shows that the standard deviation of CTM method is 0.042%while that of the PGNAA method is 0.018%;and comparatively,the PGNAA method is superior to the CTM method in terms of accuracy and timeliness.