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《Journal of Analytical Science》 2010-06
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Determination of Ti(Ⅳ)by Dual-indicator Inhibition Kinetic Spectrophotometry

CHEN Ning-sheng,WANG Sheng-zhong,FU Ying-qiang,HU Li-wu (College of Biology and Chemistry,Anhui Polytechnic University,Wuhu 241000)  
A dual-indicator inhibition kinetic spectrophotometric method for the determination of Ti(Ⅳ) has been established,which was based on the inhibition effect on decolorization reaction of Safranine-T and Brilliant cresyl blue with H2O2in the presence of catalyst Fe(Ⅲ).The absorbance of the system with and without Ti(Ⅳ)at 520nm and 620nm were measured,respectively.The optimum conditions of this reaction were studied in detail.The calibration curve was linear in the range of 4.0~100.0μg·L-1 Ti(Ⅳ)and the detection limit of method was 0.12μg·L-1.The relative standard deviation for 40 μg·L-1 Ti(Ⅳ)was 2.1%(n=11).This method was simple and sensitive.It was applied to the determination of Ti(Ⅳ)in samples with satisfactory results.
【Fund】: 安徽省科技厅科研计划(No.0302325);; 安徽省高校自然科学基金(No.2004KJ043)
【CateGory Index】: TG115.335
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