便携式铜离子分析仪化学模式的建立
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摘要
研究并优化了双环己酮草酰二腙分光光光度法测量水中铜离子的反应条件,结果表明:在pH7.5～9.5的溶液中,铜离子与双环己酮草酰二腙反应生成蓝色络合物,该络合物的最大吸收波长为600nm,显色时间是5min,铜离子在0.5～10mg/L范围内具有良好的线性。并在此基础上建立了便携式铜离子分析仪的化学模式,经测试,当铜离子浓度≤1mg/L时,仪器示值误差为±0.05mg/L;当铜离子浓度>1mg/L时,仪器示值误差为±5%;连续测量浓度为5.0mg/L的铜离子标准溶液6次,仪器的相对标准偏差(RSD)为0.5%;仪器检出限为0.04mg/L(n=11)。
Reaction conditions for the determination of copper ion in water by dicyclohexanone oxalyl dihydrazone spectrophotometric were optimized,and the chemical model of portable copper ion analyzer was established.When the copper ion concentration is no greater than 1 mg/L,the indication error of the instrument is±0.05 mg/L.When the copper ion concentration is more than 1 mg/L,the indication error of the instrument is±5%.The copper ion standard solution with a concentration of 5.0 mg/L is continuously measured 6 times,and the relative standard deviation(RSD)is 0.5%.The detection limit of is0.04 mg/L(n=11).
Reaction conditions for the determination of copper ion in water by dicyclohexanone oxalyl dihydrazone spectrophotometric were optimized,and the chemical model of portable copper ion analyzer was established.When the copper ion concentration is no greater than 1 mg/L,the indication error of the instrument is±0.05 mg/L.When the copper ion concentration is more than 1 mg/L,the indication error of the instrument is±5%.The copper ion standard solution with a concentration of 5.0 mg/L is continuously measured 6 times,and the relative standard deviation(RSD)is 0.5%.The detection limit of is0.04 mg/L(n=11).
引文
[1]国家环境保护总局·水和废水监测分析方法编委会.水和废水监测分析方法,4版.北京:中国环境科学出版社,2002:351-354.
[2]GB/T5750.6—2006生活饮用水标准
[3]吴德武,钟春龙,吴粦华.双环己酮草酰二腙光度法测定水样中铜(Ⅱ).理化检验-化学分册,知识与经验,2009,(45):1003-1004.
[4]安身景,刘虹,刘小东,欧文永.双环己酮草酰二腙光度法测定合金中高含量铜.冶金分析,2013,33(1):50-53.
[5]常永芳,刘志强,赵建录,孙翠红,双环己酮草酰二腙光度法测定废水中微量铜.石家庄学院学报,2007,9(6):41-43.
[6]吕春绪,诸松渊.化验室工作手册.南京:江苏科学技术出版社,1997:291-293.
[2]GB/T5750.6—2006生活饮用水标准
[3]吴德武,钟春龙,吴粦华.双环己酮草酰二腙光度法测定水样中铜(Ⅱ).理化检验-化学分册,知识与经验,2009,(45):1003-1004.
[4]安身景,刘虹,刘小东,欧文永.双环己酮草酰二腙光度法测定合金中高含量铜.冶金分析,2013,33(1):50-53.
[5]常永芳,刘志强,赵建录,孙翠红,双环己酮草酰二腙光度法测定废水中微量铜.石家庄学院学报,2007,9(6):41-43.
[6]吕春绪,诸松渊.化验室工作手册.南京:江苏科学技术出版社,1997:291-293.