三次样条插值离子选择电极测定人发中的氟和碘  

Determination of Fluorine and Iodine in Human Hair by lon-Selective Electrodes with Cubic Spline Interpolation

作　　者：张凤君[1] 张野[1] 赵淑洁[1] 

机构地区：[1]长春地质学院应化系

出　　处：《分析测试学报》1994年第3期82-85,共4页Journal of Instrumental Analysis

摘　　要：对同时测定同一底液中的氟和碘进行了探讨，找到了合适的１．０ｍｏｌ／Ｌ柠檬酸钠－１．０ｍｏｌ／ＬＮａＮＯ３ｐＨ＝５．５的缓冲体系。采用三次样条插值程序可很好地解决曲线的弯曲问题，改善了含氟和碘量低分析结果的准确度、精密度及检测下限。Determination of flurine and iodine in a Single solution of human hair samples with ionselective electrodes has been investigated.It was found that a buffer system of 1.0 mol/L sodium citrate-1.0 mol/L sodium nitrate at pH 5.5 was the best for this method. At lower concentrations, the accuracy, precision and limit of detection of the method can be much improved by using a program of cubic spline interpolation for the non-linear portion of the calibration curve.

关 键 词：三次样条插值 毛发 氟 碘 

分 类 号：Q581[生物学—生物化学]