Flow injection spectrophotometric method for chloride determination in natural waters using Hg(SCN) immobilized in epoxy resin

Autor:	Claudineia R. Silva, Larissa S. Canaes, Orlando Fatibello-Filho, Heberth Juliano Vieira, Joaquim A. Nóbrega
Rok vydání:	2005
Předmět:	Detection limit Thiocyanate Natural water Relative standard deviation Analytical chemistry Epoxy Chloride Analytical Chemistry Ion chemistry.chemical_compound chemistry visual_art visual_art.visual_art_medium medicine medicine.drug
Zdroj:	Talanta. 65:965-970
ISSN:	0039-9140
DOI:	10.1016/j.talanta.2004.08.028
Popis:	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 480nm after complexing reaction with Fe(III). The analytical curve for chloride was linear in the concentration range from 5.6 x 10(-5) to 2.2 x 10(-4)moll(-1) with a detection limit of 1.4 x 10(-5)moll(-1). The relative standard deviation (R.S.D.) was 2.2% for a solution containing 2.2 x 10(-4)moll(-1) (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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::72cd4319e4c80de56ce338d47e7209a1 https://doi.org/10.1016/j.talanta.2004.08.028 Zobrazit plný text záznamu Full Text from ScienceDirect