ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRIC DETERMINATION OF MOLYBDENUM IN WATER, HUMAN HAIR AND HIGH-PURITY REAGENTS WITH FLOW-INJECTION ONLINE COPRECIPITATION PRECONCENTRATION

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	ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRIC DETERMINATION OF MOLYBDENUM IN WATER, HUMAN HAIR AND HIGH-PURITY REAGENTS WITH FLOW-INJECTION ONLINE COPRECIPITATION PRECONCENTRATION
	CHEN, HW; XU, SK; FANG, ZL
刊名	JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
	1995
卷号	10 期号:8 页码:533-537
关键词	Flow Infection Online Preconcentration Electrothermal Atomic Absorption Spectrometry Molybdenum Water Hair
ISSN号	0267-9477
英文摘要	A flow injection (FI) on-line coprecipitation preconcentration system has been developed for the electrothermal atomic absorption spectrometric determination of trace or ultratrace amounts of molybdenum in water, human hair and high-purity sodium chloride. Molybdenum was coprecipitated with Fe-II-Pyrrolidin-1-yldithioformate (pyrrolidinedithiocarbamate) in 0.4 mol l(-1) HCl medium and collected on the walls of a knitted reactor. After washing, the precipitate was dissolved with 50 mu l of isobutyl methyl ketone (IBMK) and the IBMK concentrate zone was directly introduced into the graphite tube from the FI system. Electrothermal atomic absorption spectrometric determination of the concentrated analyte was carried out in parallel with the next preconcentration cycle. An enrichment factor of 22 was achieved with a 30 s loading time at a sample flow rate of 2.3 ml min(-1). The detection limit (3s) was 0.04 mu g l(-1) for a 30 s sample loading time and 0.02 mu g l(-1) for a 60 s loading time. A precision of 3.1% relative standard deviation was obtained at the 1.3 mu g l(-1) level. Recoveries of spiked molybdenum in tap water, sea-water and sodium chloride reagent mere in the range 94-104%. The result obtained for a human hair certified reference material was in good agreement with the certified value.
学科主题	Chemistry, Analytical ; Spectroscopy
语种	英语
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/55713]
专题	沈阳应用生态研究所_沈阳应用生态研究所
推荐引用方式 GB/T 7714	CHEN, HW,XU, SK,FANG, ZL. ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRIC DETERMINATION OF MOLYBDENUM IN WATER, HUMAN HAIR AND HIGH-PURITY REAGENTS WITH FLOW-INJECTION ONLINE COPRECIPITATION PRECONCENTRATION[J]. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,1995,10(8):533-537.
APA	CHEN, HW,XU, SK,&FANG, ZL.(1995).ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRIC DETERMINATION OF MOLYBDENUM IN WATER, HUMAN HAIR AND HIGH-PURITY REAGENTS WITH FLOW-INJECTION ONLINE COPRECIPITATION PRECONCENTRATION.JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,10(8),533-537.
MLA	CHEN, HW,et al."ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRIC DETERMINATION OF MOLYBDENUM IN WATER, HUMAN HAIR AND HIGH-PURITY REAGENTS WITH FLOW-INJECTION ONLINE COPRECIPITATION PRECONCENTRATION".JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 10.8(1995):533-537.