平台石墨炉原子吸收光谱法测定面粉中痕量锰  

ATOMIC ABSORPTION SPECTROMETRIC DETERMINATION OF MANGANESE IN FLOUR WITH A GRAPHITE FURNACE PLATFORM

作　　者：向立人[1] 胡耕艳[1] 刘盛聪[1] 

机构地区：[1]四川大学化学系

出　　处：《光谱学与光谱分析》1989年第3期74-76,39,共4页Spectroscopy and Spectral Analysis

摘　　要：石墨炉原子吸收测定锰文献不少,在食品分析中亦有应用。石墨炉法灵敏度高,但基体干扰较大,Smeyers-Verbeke等研究了一些化合物对锰测定的干扰,发现CaCl2,LaCl3和MgCl2干扰尤为严重。G.R.Carnrick等指出大量的氯化物的存在会产生干扰,给直接分析造成困难。采用萃取。Problems in the determination of Mn in flour using graphite furnace AAS have been studied. The sample is decomposed by nitric and perchloric acid.Mn in the sample solution is determined by a graphite platfrom treated W salt in a heated gra- phite furnace.Ascorbic acid is used as a matrix modifier for Mn. The vaporization of the sample solution containing manganese at a constant temperature environment will reduce the interforences from matrix materials. The relative standard deviation were 10% (n=11, 17.8ppm, Mn).

关 键 词：石墨炉 原子吸收光谱 测定 面粉 锰 

分 类 号：TS211.7[轻工技术与工程—粮食、油脂及植物蛋白工程]