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《Environmental Science & Technology》 2010-01
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Determination of Sulphite in Environmental Waters

GONG Zheng-jun1,XIAO Xin-feng2,ZHANG Xin-shen3(1.School of Environmental Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China;2.School of Chemistry and Environment Engineering,Shandong University of Science and Technology,Qingdao 266510,China;3.Key Laboratory of Leather Chemistry and Engineering of Ministry of Education,Sichuan University,Chengdu 610065,China)  
A kinetic method for the determination of sulphite based on catalytic effect on the reaction between sodium bromate and thionine in strongly acidic media was proposed.Under the optimal conditions,response to sulphite concentration was linear in the range of 5×10-8~2.5×10-6g/mL and 2.5×10-6~1×10-4g/mL,with the correlation coefficients of 0.995 and 0.997 respectively and detection limit of 1.7×10-8g/mL.The relative standard deviation was 2.1% for 5×10-7g/mL sulphite and 3.3% for 1×10-5g/mL sulphite.The proposed method was applied to the determination of sulphite in river water successfully,with recovery between 96.4% and 104.8%.
【Fund】: 西南交通大学科学研究基金资助(2007B17);; 西南交通大学青年教师科研起步项目基金资助(2007Q041);; 国家十五863课题研究基金资助(2002AA639290)
【CateGory Index】: X832
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