Improved procedure for the determination of iodide by ion chromatography with electrochemical detection

Simultaneous determination of bromide and nitrate in contaminated waters by ion chromatography using amperometry and absorbance detectors

“…Several studies have reported the application of electrochemical detector (DC Amperometry) for determination of oxidizable species like Cl − , Br − , I − , SCN − , S 2 O 3 2− and S 2− in aqueous samples [23][24][25][26][27]. In DC amperometry, a constant voltage is applied to the working electrode and the resulting current due to ion oxidation or reduction is monitored.…”

Comparison of silver, gold and modified platinum electrodes for the electrochemical detection of iodide in urine samples following ion chromatography

“…Although this electrochemical sensor provides high sensitivity, it is difficult to maintain an acceptable signal stability upon injection both of real and standard solutions. A valuable advancement was reported by Han et al [28], whereby a platinum electrode modified by an electroactive iodine-based layer was proposed to reduce the decrease in sensitivity during EC detection in flowing stream solutions. In that procedure the platinum working electrode assembly is immersed into a saturated KI aqueous solution for 1 h. As pointed out recently by our group [29], certain drawbacks of such procedure have been examined since the practical application is cumbersome.…”

“…The key to success was to replace the earlier off-line electrode modification [28] with a simple in-line arrangement in which the platinum working electrode is modified while the electrochemical cell is properly assembled. A syringe pump is used to flush a concentrated solution of KI into the electrochemical cell for ca.…”

Procedure for the determination of total iodine using automated sample preparation and ion chromatography

“…Measurement of total iodine or specific iodo-species can be achieved using a wide variety of analytical techniques such as X-ray fluorescence spectroscopy, differential pulse polarography, or by the use of potentiometric ion-selective electrodes, to name a few. Han et al [2] reported achieving detection limits for iodide in the low parts per billion range using ion chromatography (IC) with amperometric detection of iodide at a Pt electrode. They showed that IC possesses several advantages for the analysis of iodide, namely, sensitive and selective detection of iodide as well as a relatively fast analysis time.…”