China Coal Research Institute Corporation Ltd.
National Coal Quality Inspection and Testing Center

煤中砷含量测量结果的准确性对控制煤炭质量、推进煤炭高效清洁利用及环保政策实施具有重要意义。使用原子荧光光谱法测定煤中砷含量,其测定结果的准确性受到样品处理、试剂溶液、测定条件等因素的影响。通过建立数学模型,从测量重复性、煤样称量、标准工作溶液浓度、标准曲线拟合、样品稀释过程及煤样处理等不确定度来源进行分析,计算原子荧光光谱法测定煤中砷的合成标准不确定度为0.050μg/g,样品砷含量测定结果为(17.8±1.0)μg/g,包含因子k=2。标准工作曲线拟合、测量重复性及煤样前处理引入的不确定度为各测量不确定度来源的最主要来源,在测定时应加强样品处理、试剂溶液、测定条件等影响因素的控制。

The accuracy of the measurement results of arsenic content in coal is of great significance to controllingcoal quality, promoting the efficient and clean utilization of coal and the implementation of environmental protectionpolicies. For measuring arsenic content in coal, the accuracy of the measurement results is affected by sample pro⁃cessing, reagent solution and measurement conditions. By establishing a mathematical model, the uncertaintysources of measuring repeatability, coal sample weighing, standard working solution concentration, standard curvefitting, sample dilution process and coal sample treatment were analyzed, through calculation, we can see that thesynthesis standard uncertainty of arsenic in coal is 0. 050 μg / g, and the determination result of sample arsenic con⁃tent is (17. 8±1. 0) μg / g, k = 2. The uncertainty introduced by standard working curve fitting, measurement re⁃peatability and coal sample pretreatment are the most important sources of measurement uncertainty sources, and thecontrol of influencing factors such as sample treatment, reagent solution and measurement conditions should bestrengthened during measurement.

天地科技股份有限公司科技创新创业资金专项青年资助项目(2021-TD-QN002)

富坤. 原子荧光光谱法测定煤中砷的不确定度评定 [J]. 煤质技术, 2023, 38 (5): 90-96.

FU Kun. Evaluation of uncertainty in the determination of arsenic in coal by hydride generation⁃atomic fluorescencespectrometry [J]. Coal Quality Technology, 2023, 38 (5): 90-96.