主次波长光度法测定微量物质应用研究  

Apply Primary-Secondary Spectrophotometry to Determination of Trace Amount of Components

作　　者：周桂云[1] 

机构地区：[1]淮北啤酒厂,安徽省淮北市相阳路235000

出　　处：《光谱实验室》1997年第2期28-32,共5页Chinese Journal of Spectroscopy Laboratory

摘　　要：本文基于颜色反应依据悬浮体系光学吸收行为研究了有色溶液（A＋1）－λ变化光谱与悬浮液光谱的吸收两点，此双点也满足于颗粒光谱函数，据此建立了不受环境因素影响的微量组价计算模型，只需要测定该两点波长下的吸光度（该被长定义为生波长和次波长）。因为主波长选择在最大吸收波长处，实验S2-、NH3、SCN-、Cr（Ⅵ）、SiO2、F-、SO24等组份．该方法能提高分析灵敏度1倍，加标回收率90％-108％，相对标准偏差＜5％，方法方便、快速，适用于水中的所有微量成份的分析。By use of absorption of suspending particles agallt light, a coloured solution was studied for thedetermination of trace amount of components. In spectrophotometry two kinds of wavelength namedpdriary and secondary that were uthed to obtain the high sensitwity. In this paper, the compo-nents, which include S2-,NH-3N, SCN-,Cr(Ⅵ),SiO2,F-,SO24- and so on, have been used to devel-op their accurate calculation curves. The results show that sensitivity can be increased and the recov-ery is between 90% and 108% with the refative standard dehations are less than 5%.

关 键 词：微量组份 主次波长 分光光度法 

分 类 号：O657.32[理学—分析化学]