Spectrophotometric determination of chloride in non-polar media by the mercury(II) thiocyanate reaction

✍ Scribed by B. Vekić; D. Ražem

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 372 KB
• Volume: 193
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)86165-6

✦ Synopsis

A simple, rapid and accurate method for the spectrophotometric determination of chloride in non-polar media is described. The method is based on the well-known reaction of mercury(I1) thiocyanate with chloride to release thiocyanate, which then reacts with iron(II1). The optimum concentrations of reagents for the determination of chloride in 2,2,4trimethylpentane (iso-octane) and cyclohexane are reported. The molar absorptivity of the complex at 505 nm is 5120 f 200 dm' mol' cm-' for iso-octane and 5340 f 340 dm3 mall' cm-' for cyclohexane. Beer's Law is obeyed in the range 2 X lo-'-2 X lo-' mol drne3 (0.01-l mg 1-l) chloride.