Colorimetric filtrations of metal chelate precipitations for the quantitative determination of nickel(II) and lead(II)

	Colorimetric filtrations of metal chelate precipitations for the quantitative determination of nickel(II) and lead(II)
	Feng, Liang; Zhang, Yue; Wen, Liying; Chen, Liang; Shen, Zheng; Guan, Yafeng
刊名	analyst
	2011
卷号	136 期号:20 页码:4197-4203
ISSN号	待补充
通讯作者	冯亮 ; 关亚风
产权排序	1,1
中文摘要	colorimetric filtrations of metal chelate precipitations for the quantitative determination of nickel(ii) and lead(ii)
英文摘要	a colorimetric filtration method has been developed for the highly selective and sensitive determination of ni(2+) and pb(2+) ions. determinations of ni(2+) and pb(2+) follow the filtration using nioxime (1,2-cyclohexanedione dioxime) and rhodizonic acid disodium salt, respectively, as colorimetric reagents. different from regular instrumentation techniques, the metal chelate precipitations are continuously pumped into a home-made flow cell at a constant flow rate, and filtered by a cellulose acetate/nitrate membrane. the color changes of the membrane are imaged using a conventional flatbed scanner, and digitized. the special selection of individual channels in the red, green, and blue channels of the images filters the influences of coexisting ions and provides a highly selective detection of ni(2+) and pb(2+) cations. the linear relationship between the colorimetric response of the chosen channel and ni(2+) or pb(2+) concentrations indicates a quantitative detection. the detection limit for pb(2+) is 3 mu m (almost half of the chinese wastewater discharge standard concentration), and is well below the nm level (94 nm) for ni(2+) (a quarter of the who drinking water safe-exposure standard for ni(2+)). the determinations take five to ten minutes. no shelf life issue exists because the chelating indicators react with metal directly without any pre-immobilizations.
学科主题	物理化学
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, analytical
研究领域[WOS]	chemistry
关键词[WOS]	atomic-absorption-spectrometry ; solid-phase extraction ; optical-emission-spectrometry ; adsorptive stripping voltammetry ; water samples ; sensor array ; trace amounts ; icp-oes ; optoelectronic nose ; preconcentration
收录类别	SCI
语种	英语
WOS记录号	WOS:000295334000017
公开日期	2012-07-09
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/115450]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	CAS, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Lab Instrumentat & Analyt Chem, Dalian 116023, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Feng, Liang,Zhang, Yue,Wen, Liying,et al. Colorimetric filtrations of metal chelate precipitations for the quantitative determination of nickel(II) and lead(II)[J]. analyst,2011,136(20):4197-4203.
APA	Feng, Liang,Zhang, Yue,Wen, Liying,Chen, Liang,Shen, Zheng,&Guan, Yafeng.(2011).Colorimetric filtrations of metal chelate precipitations for the quantitative determination of nickel(II) and lead(II).analyst,136(20),4197-4203.
MLA	Feng, Liang,et al."Colorimetric filtrations of metal chelate precipitations for the quantitative determination of nickel(II) and lead(II)".analyst 136.20(2011):4197-4203.