2003•Journal of Analytical ScienceRequires access

Study on the Determination of Trace Bromine by Minus Catalytic Kinetic Spectrophotometry

Dalun Zhang

Abstract

A new method for the determination of trace bromine ion is described. The method is based on its minus catalytic effect upon KBrO 3 oxidize methyl orange. The molar absorption coefficient is 1 0×10 6 L·mol -1·cm -1. The linar range of the determination for bromine is 0.5 ～ 1.8 ng/mL.The method has been used for the determination of trace bromine in well water and salt with satisfactory results.

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Key concepts: Bromine, Chemistry, Spectrophotometry, Catalysis, Trace Amounts, Orange (colour), Xylenol orange, Kinetic energy