离子色谱法测定水中亚硝酸盐的不确定度评定——应用TOP-DOWN技术

Uncertainty measurement of nitrite in water by ion chromatography based on TOP-DOWN technique

利用2个不同阶段的亚硝酸盐实验室质控样品的数据,采用TOP-DOWN技术中的控制图法评定了离子色谱法测定水中亚硝酸盐的不确定度。方法按照HJ 84—2001《水质无机阴离子的测定离子色谱法》测定水中亚硝酸盐。结果显示,测定亚硝酸盐浓度为0.388mg/L的实验室质控样品,不确定度为0.012mg/L。

Based on the data of nitrites samples at different process phases in laboratory,the uncertainty of the nitrites in water is measured by ion chromatography using TOP-DOWN technique.The samples are measured by standard Water Quality-Determination of Inorganic Anions-Ion Chromotography Method.It shows that the uncertainty is 0.012 mg/L for the QC sample with the concentration of 0.388 mg/L