A STOPPED-FLOW INDUCTIVE KINETIC SPECTROP HOTOMETRIC METHOD FOR SIMULTANEOUS DETERMINATION OF IRON AND ANTIMONY

A stopped-flow inductive kinetic spectrophotometric method for the sim ultaneous determination of iron and antimony was proposed. The princip le of determination was discussed, and a procedure for simultaneous de termination of Fe(II) and Sb (III) was established based on the induct ive effect of them on the chromium(VI)-iodide redox reaction. The cali bration graphs were linear for 0 approximately 1.2mug.mL-1 Fe(II) and 0 approximately 2.0mug.mL-1 Sb(III) respectively, and the detection li mits were 0.012mug.mL-1 Fe(II) and 0.014mug.mL-1 Sb (III). The method was used for the determination of iron and antimony in zinc metal stan dard and a simulated sample, and the results are satisfactory.