微波消解石墨炉原子吸收光谱法测定松花粉中铅的测量不确定度评定

Evaluation of Measurement Uncertainty for Determination of Lead in Pine Pollen by Microwave Digestion-GFAS Method

介绍了石墨炉原子吸收光谱法测定松花粉中铅的不确定度评定方法。通过不确定度评定得出不确定度分量的主要来源为样品制备过程所带来的不确定度,其中,消解样品所引入的不确定度贡献最大;根据最小二乘法拟合校准曲线计算的标准不确定度次之;而重复性实验以及标准储备液校准稀释所带来的不确定度相对于前两者小很多。

The evaluating method of uncertainty was introduced for determining the content of lead in pine pollen by microwave digestion - GFAS method. The results show that the key factors of uncertainty of lead content measurement and important source of indefinite component are digestion sample. evaluation indicated the uncertainty of standard curve was the second source of unccrtainty. uncertainty from standard stock solution adjusted and diluted and the repeated detcrmination The The aresubordinate factors.