食品科学2011，Vol.32Issue(22)：234-236,3.
微波消解-双指示剂双波长催化分光光度法测定食品中的铬
Microwave Digestion Coupled with Dual-Wavelength Dual-Indicator Catalytic Kinetic Spectrophotometry for Determination of Chromium in Food
摘要
Abstract
Trace chromium（VI） catalyzes the oxidation of crystallized violet and methyl green by potassium chlorate in dilute H2SO4 solution,which will cause the discoloring of the solution.A dual-wavelength and dual-indicator catalytic kinetic spectrophotometric method to quantify the concentration of chromium（Ⅵ） was proposed by determining the difference of absorbance（ΔA） of the reaction solution with and without trace chromium（Ⅵ） as catalyst.The results showed that limit of detection of the proposed method was 0.003 mg/L and that the recovery for chromium（Ⅵ） was between 98.3% and 102.0% with a relative standard deviation of less than 2.7%.The linear range was 0.045-0.200 μg/mL.Our results demonstrate that this method is simple,convenient and applicable in practice.关键词
双波长分光光度法/铬/食品Key words
dual-wavelength spectrophotometry/chromium/food分类
化学化工引用本文复制引用
侯法菊,苗延虹,陈玉静,徐慧..微波消解-双指示剂双波长催化分光光度法测定食品中的铬[J].食品科学,2011,32(22):234-236,3.基金项目
山东省优秀中青年科学家科研奖励基金项目 （）
鲁东大学科研基金项目 （）
