CAJ | 학술논문

以原子吸收法测定土壤中铅为例，本文分析了测试过程中不确定度的来源。对各不确定度分量进行评定及合成，并计算得出合成不确定度和扩展不确定度。结果表明，标准储备液配制过程引入的不确定度可以忽略不计。对本测试方法影响较大的不确定度分量是标准溶液稀释使用移液管的精度和微量进样器进样体积以及样品前处理和测定过程中的随机因素引起的相对不确定度。
이원자흡수법측정토양중연위례，본문분석료측시과정중불학정도적래원。대각불학정도분량진행평정급합성，병계산득출합성불학정도화확전불학정도。결과표명，표준저비액배제과정인입적불학정도가이홀략불계。대본측시방법영향교대적불학정도분량시표준용액희석사용이액관적정도화미량진양기진양체적이급양품전처리화측정과정중적수궤인소인기적상대불학정도。
With the atomic absorption method for determination of Pb in soil as an example, this article analyses the source of uncertainty in the testing process, evaluates and synthesizes every branch of uncertainty, and calculates the combined uncertainty and expanded uncertainty. The result shows that the uncertainty in the preparation process of standard solution can be ignored. However, this test method is greatly influenced by the following uncertainties： the precision of the pipette that used in dilution of standard solution, the volume of micro syringe and stochastic factors in sample pretreatment and determination.