Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10561508 | Talanta | 2005 | 6 Pages |
Abstract
A flow injection (FI) spectrophotometric method was proposed for the determination of chloride ion in natural waters. The determination of chloride was carried out by reaction with Hg(SCN)2 immobilized in an epoxy resin bead in a solid-phase reactor (SPR) and the thiocyanate ions released were determined spectrophotometrically at 480 nm after complexing reaction with Fe(III). The analytical curve for chloride was linear in the concentration range from 5.6 à 10â5 to 2.2 à 10â4 mol lâ1 with a detection limit of 1.4 à 10â5 mol lâ1. The relative standard deviation (R.S.D.) was 2.2% for a solution containing 2.2 à 10â4 mol lâ1 (n = 10). The simple manifold allows a routine analytical frequency of 100 determinations per hour. The main advantage of the developed method is the 400% reduction of the Hg waste solution generated when compared to conventional methods for chloride determination based on the same spectrophotometric reaction.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Claudineia R. Silva, Heberth J. Vieira, Larissa S. Canaes, Joaquim A. Nóbrega, Orlando Fatibello-Filho,