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Cu2+对分光光度法测定水样中COD的影响
Effect of Copper Ion in Water Sample on COD Determination by Spectrophotometry
【摘要】 通过测定Cr3+、Cr2O72-和Cu2+吸收曲线及标准水样的COD值,研究了Cu2+对分光光度法测定COD的影响。结果表明,可改变吸收波长和量程消除较高质量浓度Cu2+对COD测定值产生的明显影响。当水样Cu2+质量浓度超过400 mg/L时,须将水样稀释后采用低量程法进行测定。
【Abstract】 The effect of Copper ion on COD determination with spectrophotometry was studied by Absorption curve measurement of Cr3+、Cr2O2-7 、Cu2+ and COD of standard water samples.The results showed that the obvious effect of high concentration of Copper ion could be eliminated by change of the Absorption wavelength or range.The water samples should be diluted with low range method for COD determination if the concentration of Cu2+ was over 400 mg/L.
- 【文献出处】 环境监测管理与技术 ,The Administration and Technique of Environmental Monitoring , 编辑部邮箱 ,2009年01期
- 【分类号】X832
- 【被引频次】1
- 【下载频次】186