Simultaneous determination of trace heavy metals in waters by atomic absorption spectrometry after preconcentration by solvent extraction
- Dept. of Atomic Energy, Shillong (India)
- North-Eastern Hill Univ., Shillong (India)
A simple and rapid method for the simultaneous extraction of heavy metals using a new reagent 5-(2{prime}-carbomethoxyphenyl) azo-8-quinolinol (R) into methyl isobutyl ketone (MIBK) and their subsequent determination by flame atomic absorption spectrometry is described. The method has been applied to the determination of Cu, Pb, Ni, Fe, Cr, Co, and Mo in drinking and bore well waters. The extraction has been carried out with an aqueous to organic phase ratio to achieve around 30 fold preconcentration of metals. Extraction parameters and the influence of diverse ions have been studied. The detection limits (36) for Cu, Pb, Ni, Fe, Cr, Co and Mo are 0.07, 0.23, 0.15, 0.09, 0.22, 0.17, 0.38, {mu}g/1, respectively. Higher preconcentration factors can be achieved by using a higher aqueous to organic phase ratio and lower concentration of metals can be determined.
- OSTI ID:
- 6974644
- Journal Information:
- Analytical Letters; (United States), Journal Name: Analytical Letters; (United States) Vol. 25:8; ISSN ANALB; ISSN 0003-2719
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102 -- Chemical & Spectral Procedures
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54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
CHROMIUM
COBALT
CONTAMINATION
COPPER
DRINKING WATER
ECOLOGICAL CONCENTRATION
ELEMENTS
EXTRACTION
HYDROGEN COMPOUNDS
IRON
LEAD
METALS
MOLYBDENUM
MONITORING
NICKEL
OXYGEN COMPOUNDS
REAGENTS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTRA
SPECTROSCOPY
TRACE AMOUNTS
TRANSITION ELEMENTS
WATER
WATER WELLS
WELLS