摘要
利用Ｋａｌｍａｎ滤波技术和二溴苯基荧光酮－溴化十六烷基三甲基铵－Ｃ_２Ｈ_５ＯＨ分光光度测定体系，同时对Ｃｒ（Ⅲ）和Ｃｒ（Ⅳ）进行测定。Ｃｒ（Ⅲ）的表观摩尔吸光系数为１．９６ × １０~５ Ｌ· ｍｏｌ^（－１）·ｃｍ^（－１），线性范围为０～ ４．０ ｘ１０－６ｍｏｌ／Ｌ；Ｃｒ（Ⅵ）的表观摩尔吸光系数为４．１６ ×１０~５Ｌ· ｍｏｌ^（－１）· ｃｍ^（－１），线性范围为０～５．２×１０^（－１）ｍｏｌ／Ｌ。
A system of' dibromophenylfluorone (DBPF) - cetyltrimethylamonium bromide (CTMAB)- C2H5OH'-Kalman Filter spectrophotometry for speciation analysis of inorganic chromium has been studied. We utilized kalman filter method to resolve the overlapping spectra of Cr(Ⅲ) complex and Cr(Ⅵ) complex and established a simultaneous detemination method for Cr(Ⅲ) and C(Ⅵ). The apparent molar absorption coefficients are 1 .96 x 105 L'mol^(-l). cm^(-1) for Cr(Ⅲ) and 4. 16 x 105 L.mel^(-1). cm^(-1) for Cr(Ⅵ). Beer's law is obeyed in the range of 0 - 4 .0 x 10^(-6) mol/L and 0 - 5. 2 x 10^(-6) mol/L respectively for Cr(Ⅲ) and Cr(Ⅵ). The sensitivity and accuracy of the method were satisfactory when the system was used for practical samples.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2000年第8期989-992,共4页
Chinese Journal of Analytical Chemistry
关键词
卡尔曼滤波
分光光度法
无机铬
形态分析
Kalman filter, spectrophotometry, chromium, speciation analysis, dibromophenylfluorone
