Document Details

Document Type : Article In Journal 
Document Title :
Spectrofluorometric determination and chemical speciation of trace concentrations of chromium (III & VI) species in water using the ion pairing reagent tetraphenyl-phosphonium bromide
Spectrofluorometric determination and chemical speciation of trace concentrations of chromium (III & VI) species in water using the ion pairing reagent tetraphenyl-phosphonium bromide
 
Subject : Chemistry 
Document Language : English 
Abstract : A highly selective, and low cost extractive spectrofluorometric method has been developed for determination of trace concentrations of chromium (III & VI) in water samples using the fluorescent reagent tetraphenylphosphonium bromide (TPP+·Br-). The method was based upon solvent extraction of the produced ion associate [TPP+· CrO3Cl-] of TPP+·Br- and halochromate in aqueous HCl and measuring the fluorescence quenching of TPP +·Br- in chloroform at λex/em = 242/305 nm. The fluorescence intensity of TPP+Br- decreased linearly on increasing the chromium (VI) concentration in the range of 1-114 μg L-1. The limits of detection (LOD) and quantification (LOQ) of chromium (VI) were 0.43 and 1.42 μg L-1, respectively. Chromium (III) species after oxidation to chromium (VI) with H2O 2 in alkaline solution were also determined. Chemical speciation of chromium (III & VI) species at trace levels was achieved. The method was applied for analysis of chromium in certified reference material (IAEA Soil-7) and in tap- and wastewater samples and compared successfully (>95%) with the inductively coupled plasma-mass spectrometry (ICP-MS) results. 
ISSN : 0039-9140 
Journal Name : Talanta 
Volume : 84 
Issue Number : 1 
Publishing Year : 1432 AH
2011 AD 
Article Type : Article 
Added Date : Sunday, February 12, 2012 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
محمد سرور الشهاويEl-Shahawi, Mohammad SResearcherDoctoratemohammad_el_shahawi@yahoo.co.uk
H M Al-SaidiAl-Saidi, H MResearcherDoctorate 
عبدالعزيز صالح باشماخBashammakh, Abdulaziz SalehResearcherDoctorateabashammakh@kau.edu.sa
عبدالعزيز إبراهيم السباعيEl-Sebaii, A AResearcherDoctorateaasebaii@yahoo.com
محمد عبدالعظيم عبدالفضيلAbdelfadeel, M AResearcherDoctorate 

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