摘要
利用离子色谱法(IC)来定量水中氟离子含量的实验。依据标准要求,分析测量过程中的不确定度主要来源,建立数学模型,结合A类、B类不确定度评定的方法,分析标准工作溶液的不确定度:该不确定度又由标准储备液浓度值的不确定度以及将标准储备液稀释至标准工作液过程中的各步骤中分取体积和定容体积的不确定度及校准曲线拟合和重复测量样品的不确定度等分量组成。用具有电导检测器的离子色谱仪对其测量不确定度进行评定。评定结果为水中阴离子(以氟离子为例)的测量不确定度为:0.664±0.094mg/L,k=2。
The experiment of quantitative determination of fluoride ion in water by ion chromatography(IC). According to the standard requirement, the main sources of uncertainty in the measurement process are analyzed, and a mathematical model is established. The uncertainty of standard working solution is analyzed by combining the evaluation methods of uncertainty of type A and B. The uncertainty is also determined by the uncertainty of concentration value of standard reserve solution and the process of diluting standard reserve solution to standard working fluid. In each step, the uncertainty of separation volume and volume volume, the uncertainty of calibration curve fitting and repeated measurement of samples are composed of components. The uncertainty of measurement was evaluated by ion chromatography with conductivity detector. The uncertainty of measurement for anions in water(taking fluoride ion as an example) was 0.664(+0.094 mg/L) and k=2.
作者
朱雯佳
Zhu Wenjia(Shanghai Geotechnical Engineering Testing Center, Shanghai 200436, China)
出处
《广东化工》
CAS
2019年第15期191-192,189,共3页
Guangdong Chemical Industry
关键词
水质
离子色谱法
氟离子
测量不确定度
评定
water quality
ion chromatography
fluoride ion
measurement uncertainty
evaluation
