石墨炉原子吸收测定生物样品中痕量铬的基体比较研究  

Graphite furnace atomic absorption spectrophotometer for determination of trace chromium in biological samples and matrix modifier

作　　者：高振宗[1] 晋玉霞 马玲[1] 

机构地区：[1]陕西师范大学实验中心

出　　处：《陕西师大学报（自然科学版）》1998年第3期74-77,共4页Journal of Shaanxi Normal University(Natural Science Edition)

摘　　要：对石墨炉原子吸收分光光度法测定生物样品中痕量铬的基体改进剂进行了比较研究，选定了Ｍｇ（ＮＯ３）２为基体改进剂，拟定了不需校正背景、不用分离直接石墨炉原子吸收法测定痕量铬的分析方法．结果表明，方法的线性范围为０～２００ｎｇ／ｍＬＣｒ，其特征量为３．５×１０－１２ｇ／１％．方法已用于人血清、人尿和人发中痕量铬的测定．In determination of trace chromium with graphite furnace atomic absorption spectrophotometry (GFAAS). the effect of matrix modifier of some reagents have been studied and compared. Mg(NO 3) 2 is selected as the matrix modifier for changing the atomization process of sample of the biology. The sensitivity of the method is raised. The sensitivity is 3.5×10 -12 g/1% The calibration curve is linear for concentration 0～200 ng/mL Cr. The relative error is 0.21% for the determination of trace Cr in standard hair sample.

关 键 词：铬 原子吸收光度法 GFAAS 基体改进剂 生物材料 

分 类 号：O657.31[理学—分析化学] Q503[理学—化学]