Highly Sensitive Determination of Trace Molybdenum (VI) by Catalytic Kinetic Spectrophotometry
A sensitive, simple, new catalytic-kinetic spectrophotometry method is proposed for determination of trace molybdenum (VI) which is based on the molybdenums significant catalysis to the fading reaction between carboxyazoⅠ and KIO4 which is quasi-zero-order reaction. The optimum reaction conditions were: 1.0 mL carboxyazoⅠ, 1 mL KIO4, 2.0 mL acetate buffer of pH 5.0±0.05 and at 100 ℃. Following the recommended procedure, the linear range of this assay was from 0.15 to 10.5 ng·mL-1 (r=0.9967). The limit of detection was 0.03 ng·mL-1.The relative standard deviation for the determination of 5.0 ng·mL-1 molybdenum (VI) was below 2.1％ (n=6). The proposed method was applied to the determination of molybdenum (VI) in environment water with satisfactory results.
molybdenum (VI) carbozyazo Ⅰ catalytic-kinetic spectrophotometry
Mei Yan Shenguang Ge Jinghua Yu Shan Wang Yang Xiao
School of Chemistry and Chemical Engineering University of Jinan Jinan,Peoples Republic of China
国际会议
北京
英文
1-3
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）