摘要
基于Mn（Ⅶ）-Cl^--Fe（Ⅱ）-SCN^-反应体系，提出了利用诱导反应的动力学光度法测定微量锰的方法。该体系在468nm波长处有最大吸收，线性范围为0～20μg／25mL，表观摩尔吸光系数为4．91×10^4L·mol^-1·cm^-1，检出限为1.39×10^-5g·L^-1，用于人发、牙膏和水等样品中锰的测定，结果的RSD均小于3．5％，回收率在98．7％至102．0％之间。
Based on the induced redox reaction system of Mn （ Ⅶ ）-Cl^--Fe （ Ⅱ ）-SCN^-, a sensitive kinetic spectrophotometric method for determination of microamounts of manganese（ Ⅱ ） was proposed. The absorption maxima of this reaction system was found at the wavelength of 468 nm, and Beer＇s law was obeyed in the range of 0 to 20 μg of Mn（Ⅶ） per 25 mL of solution, with a detection limit of 1.39×10^-5g · L^-1. In the application to analysis of human hair, tooth paste, and water samples, values of RSD （n=6） obtained were less than 3.5%, and recoveries were in the range of 98.7% to 102.0%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2006年第6期473-475,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
诱导动力学光度法
锰(Ⅱ)
人发
牙膏
水
Induced kinetic Spectrophotometry
Manganese（ Ⅱ ）
Human hair
Tooth paste
Water
