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Citation: ZHANG Li-Na, LI Bo, YU Jing-Hua, WEI Qin. Determination of Trace Tin by Inhibitory Fluorescence Spectrophotometry[J]. Chinese Journal of Applied Chemistry, ;2008, 25(12): 1417-1420. shu

Determination of Trace Tin by Inhibitory Fluorescence Spectrophotometry

1.
School of Chemistry and Chemical Engineering, University of Ji'nan, Ji'nan 250022

Corresponding author: YU Jing-Hua,
Received Date: 3 December 2007
Available Online: 30 March 2008
Fund Project: 国家十一五支撑计划子课题(2006BAJ03A09-06) (2006BAJ03A09-06)山东自然科学基金(Y2007B07) (Y2007B07)山东省重点学科基金(XTD0705)资助项目 (XTD0705)

A new method for the determination of trace tin has been established.The method is based on the catalytic effect of Sn(Ⅳ) on the oxidation of 3-(3'-chlorophenyl)-5-(2'-aresenoxylphenylazo)rhodanine by potassium periodate in a buffer solution of potassium hydrogen phthalate-sodium hydroxide at pH=5.0,where the apparent active energy and reaction rate constant are calculated to be 51.20 kJ/mol and 1.23×10^-2/s.The excitation and emission wave lengths are 308 nm/410 nm,the linear range is 0~0.01 ×10^-6 g/mL,the detection limit is 1.65×1^-9 g/mL.The method has been used to determine Sn(Ⅳ) in food and enviro-nmental water with satisfactory results after separation and enrichment on sulphydryl dextran gel,which can enhance the selectivity of the method significantly.
- catalytic spectrofluorimetric,
- tin,
- rhodanine,
- sulphydryl dextran gel
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