title: Inhibition kinetic determination of trace amount of iodide by the spectrophotometric method with rhodamine B.
abstract: Trace iodide was determined by inhibition kinetic method, which based on its inhibition effects on the reaction between rhodamine B (RhB) and KBrO(3) in H(2)SO(4) medium in 45+/-0.5 degrees C for 15 min. The signal difference (DeltaA, DeltaF) between inhibited reaction and non-inhibited reaction is linear with the concentration of iodide. The linear range were 2.0-6.0 and 1.0-6.0 ng mL(-1) and the detection limit were 0.06 and 0.07 ng mL(-1), respectively. The method has been applied satisfactorily to the determination of iodide in kelp.
authors.affiliation: Department of Chemistry, Yangzhou University, Yangzhou 225002, PR China. xszhu@yzu.edu.cn
authors.forename: Xiashi
authors.initials: X
authors.lastname: Zhu
authors.forename: Yiaqin
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D001959:Bromates / Q000737:chemistry; D007454:Iodides / Q000032:analysis*; D007700:Kinetics; D012235:Rhodamines / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013053:Spectrophotometry / Q000379:methods*; D013696:Temperature; D013997:Time Factors