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	Determination of trace silver by solid substrate-room temperature phosphorescence quenching method based on double catalytic system of meta-nitrophenyfluorone-polyoxyethylene-chromium-potassium bromate-beta-cyclodextrin
	Liu Jiaming ; Lin Xuan ; Wu Aihong ; Hu Li-Xiang ; He Hangxia ; Huang Honghua ; Li Longdi ; Lin Shaoqin
	2010-05-06 ; 2010-05-06
关键词	silver meta-nitrophenyfluorone-polyoxyethylene-chromium-potassium-bromate-beta-cyclodextrin solid substrate-room temperature phosphorescence quenching method PHASE PHOSPHORIMETRY Spectroscopy
中文摘要	A new solid substrate-room temperature phosphorescence (SS-RTP) quenching method for the determination of trace silver has been established. It is based on the fact that when using Mg2+ as ion perturber and P-CD as surfactant, the system of meta-nitrophenyfluorone (R)-polyoxyethylene-Cr(III) can emit strong and stable room temperature phosphorescence signal on filter paper whose surface is modified by polyvinyl alcohol (PVA)-H3BO3-NaOH. Ag(I) can catalyze KBrO3 oxidizing R-PEO-Cr(III) system which causes the quenching of SS-RTP. The reducing value of phosphorescence intensity (Delta Ip) is directly proportional to the concentration of Ag(I) in the range of 3.2-160 ag spot(-1) (corresponding concentration: 2.43 fg ml(-1), the sample volume: 0.40 mu l spot(-1)) with a detection limit (LD) of 0.97 ag spot(-1). The regression equation of working curve can be expressed as Delta I-p = 13.92 + 0.3089m(Ag+) (ag spot(-1)) (r = 0.9983, n = 6). This method has many advantages, such as a wide linear dynamic range, high sensitivity, good repeatability and selectivity. It has been applied to the determination of trace silver in real samples with satisfactory results. What is more, the mechanism of SS-RTP quenching method based on Ag(I) catalyzing KBrO3 oxidizing meta-nitrophenyfluorone has also been discussed. (c) 2005 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/12760]
专题	清华大学
推荐引用方式 GB/T 7714	Liu Jiaming,Lin Xuan,Wu Aihong,et al. Determination of trace silver by solid substrate-room temperature phosphorescence quenching method based on double catalytic system of meta-nitrophenyfluorone-polyoxyethylene-chromium-potassium bromate-beta-cyclodextrin[J],2010, 2010.
APA	Liu Jiaming.,Lin Xuan.,Wu Aihong.,Hu Li-Xiang.,He Hangxia.,...&Lin Shaoqin.(2010).Determination of trace silver by solid substrate-room temperature phosphorescence quenching method based on double catalytic system of meta-nitrophenyfluorone-polyoxyethylene-chromium-potassium bromate-beta-cyclodextrin..
MLA	Liu Jiaming,et al."Determination of trace silver by solid substrate-room temperature phosphorescence quenching method based on double catalytic system of meta-nitrophenyfluorone-polyoxyethylene-chromium-potassium bromate-beta-cyclodextrin".(2010).

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