二阶导数光谱—峰面积法测定镍  

The Second-derivative Spectrum-Peak Area Spectrophotometry for the Determination of Trace Nickel(Ⅱ)

作　　者：李红玫[1] 辛红[1] 

机构地区：[1]长春师范学院化学系,吉林长春130032

出　　处：《长春师范学院学报（自然科学版）》2002年第2期29-30,共2页Journal of Changchun Teachers College

摘　　要：本文在镍 ( )丁二酮肟—阿拉伯胶的显色体系中 ,引入二阶导数光谱——峰面积技术 ,对显色体系及测定方法进行了研究。该法有效消除 Fe ( )离子的干扰 ,提高了准确度和灵敏度。测定镍的线性范围为 0～ 12 mg/ L ,检出限 2 . 5 6μg/ L ,表观摩尔吸光系数ε=1. 4× 10 5L· mol-1 · cm-1 。用于中药材的加收试验 ,结果满意。The second derivative spectrum peak area spectrophotometry for determination of nickel(Ⅱ)was estabished in tribasic complex chromogenic system.The interence of Fe(Ⅱ)and was eliminated effectively.The accuracy and sestivity is improved.The linear range of determination is 0～12mg/L.The detected limit of method is 2.56μg/L.The molar absorptivity is 1.4×10 5L·mol -1 ·cm -1 .The results obtained for the recovery test of samples are satisfactory.

关 键 词：色体 二阶导数光谱 表观摩尔吸光系数 Fe(Ⅱ) 离子 阿拉伯胶 干扰 显色 中药材 测定 

分 类 号：G633[文化科学—教育学] Q959.4[生物学—动物学]