Solid phase extraction and spectrophotometric determination of mercury by adsorption of its diphenylthiocarbazone complex on an alumina column.
A simple method has been developed for the preconcentration of mercury based on the adsorption of its diphenylthiocarbazone complex on a neutral alumina column. The influence of acidity, eluting agents, stability of the column, sample volume and interfering ions has been investigated in detail. The adsorbed complex could be eluted using environmentally benign polyethylene glycol (PEG 400) and the concentration of mercury was determined by visible spectrophotometry at a wavelength maximum of 520nm. A detection limit of 4microgL(-1) could be achieved and the developed procedure was successfully applied for the determination of mercury in spiked water samples and city waste incineration ash (CRM176). The preconcentration factor attainable for quantitative recovery (>95%) of mercury(II) was 100 for a 1000mL sample volume.
Rajesh
N
N
Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, India. rajesh@bits-pilani.ac.in
Gurulakshmanan
G
G
D000327:Adsorption; D000537:Aluminum Oxide / Q000737:chemistry*; D004230:Dithizone / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D008628:Mercury / Q000032:analysis* / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000379:methods*; D013053:Spectrophotometry / Q000379:methods*; D014867:Water / Q000032:analysis / Q000737:chemistry; D014881:Water Supply
D007477:Ions; D014867:Water; D004230:Dithizone; D008628:Mercury; D000537:Aluminum Oxide