异烟酸-吡唑啉酮分光光度法测定地下水中氰化物的不确定度评定  

Uncertainty Evaluation for the Determination Results of Cyanide by Isonicotinic Acid-Pyrazolone Spectrophotometry

作　　者：潘河 王亚平[2] 代阿芳[2,3] 许春雪[2] 袁建[2] 

机构地区：[1]黑龙江省地质矿产测试应用研究所,黑龙江哈尔滨150036 [2]国家地质实验测试中心,北京100037 [3]中国地质大学(武汉)材料科学与化学工程学院,湖北武汉430074

出　　处：《岩矿测试》2010年第4期438-444,共7页Rock and Mineral Analysis

基　　金：国土资源部公益性行业科研专项经费资助(200811133)

摘　　要：采用不确定度连续传递模型,对异烟酸-吡唑啉酮分光光度法测定地下水中氰化物的不确定度进行评定。分析了不确定度的重要来源,包括样品制备、标准溶液配制、标准曲线拟合和仪器测量过程等引入的不确定度分量。采用x、y双误差回归方式对标准曲线进行拟合,通过分析得知,样品中氰化物浓度越低,其相对不确定度越大。The measurement uncertainty for the analytical results of cyanide in groundwater samples by isonicotinic acid-pyrazolone spectrophotometric method was evaluated using continuous propagation model of uncertainty.The main sources of measurement uncertainties were from sub-uncertainties of sample preparation,calibration solution preparation,calibration curve fitting and instrument measurements,etc.The double error regression method was used for calibration curve fitting.The results showed that the lower the concentration of cyanide in the sample,the greater the relative uncertainty of the measurement results.

关 键 词：不确定度评定 异烟酸-吡唑啉酮分光光度法 地下水 氰化物 双误差 

分 类 号：O657.3[理学—分析化学] O213.1[理学—化学]