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在吸光光度分析领域里,探索不经任何分离而同时测定多个相互干扰组份的方法是人们关注的研究课题。目前国内外已有许多文献报道。但大多数试验都是针对金属体系的。对于NO_3~-和NO_2~-体系的同时测定,虽有文献报道,但这些方法有的需加显色剂,有的借助仪器输出的信息消除光谱带干扰或解决重叠光谱的分辨率。本文将吸光光度法、计算数学法及计算机技术三者相结合,用现代数学分离方法代替繁琐的化学分离或掩蔽方法,同时测定合成样品中的NO_3~-和NO_2~-,取得了满意的结果。NO_3~-和NO_2~-的最大吸收波长为203nm和209nm;遵守比耳定律的线性范围为0.005～2.50μg·ml~(-1)和0.02～5.00μg·ml~(-1)。在196～216nm
In the field of absorbance spectroscopy, it is a research topic that people are concerned to explore the method of simultaneously measuring a plurality of mutual interference components without any separation. At present, there are many reports in the literature at home and abroad. But most of the tests are for metal systems. For the simultaneous determination of NO_3 ~ - and NO_2 ~ - systems, although some reported in the literature, some of these methods need to add a color reagent, and some use the information output by the instrument to eliminate the interference of the spectrum band or to resolve the resolution of the overlapping spectrum. In this paper, the combination of absorbance spectrophotometry, computational mathematics and computer technology were used to replace the cumbersome method of chemical separation or masking with modern mathematical separation method, and the NO_3 ~ - and NO_2 ~ - in the synthesized samples were simultaneously determined and satisfactory results were obtained . The maximum absorption wavelengths of NO_3 ~ - and NO_2 ~ were 203nm and 209nm, respectively. The linear range of Beer’s law was 0.005 ~ 2.50μg · ml ~ (-1) and 0.02 ~ 5.00μg · ml ~ (-1). At 196 ~ 216nm