Karthikeyan Sholampettai Subramanian

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A second national survey was done to ascertain the levels of Cd, Co, Cr, Cu, Ni, Pb, Zn, Ca, and Mg in Canadian drinking water supplies. Raw, treated, and distributed water samples collected from 71 municipalities across Canada were analyzed both by atomic absorption spectrophotometry using the direct method and by an APDC-MIBK extraction procedure. As in(More)
This paper presents multi-element profiles of indoor dust versus exterior soils and dusts from 50 residences located in 10 neighborhoods across Ottawa, the capital city of Canada. Mercury concentrations were determined using nitric-sulphuric acid digestion and cold vapor AAS. Concentrations of 31 other elements were determined using nitric-hydrofluoric acid(More)
Stable lead was determined in post-mortem samples of human bones from three Canadian cities. All age groups and both sexes were represented. The cities selected for investigation were Winnipeg, Montreal and Charlottetown. No significant difference was found between the locations, although levels tended to be higher for Montreal. Mean lead concentrations(More)
The concentration of total soluble inorganic arsenic (i.e. arsenate plus arsenite) was measured in duplicate well water samples of 94 residents in Halifax County, N.S. An ammonium pyrrolidinedithiocarbamate-methyl isobutyl ketone graphite-furnace atomic absorption spectrophotometric procedure and also an automated hydride-evolution(More)
The levels of Cd, Cu, Pb and Zn were measured in duplicate whole blood samples of 946 apparently normal children ranging in age from 2 years to 12 years and living in Kamloops, British Columbia, Canada. The metals were determined using atomic absorption spectrometry: graphite furnace AAS for Cd and Pb, and flame AAS for Cu and Zn. The median and extreme(More)
A rapid graphite-furnace atomic absorption spectrophotometric procedure is described for determining cadmium and lead in heparinized human whole blood. A known aliquot of the blood sample is diluted fivefold with an aqueous solution composed of 5 g each of diammonium hydrogen phosphate and Triton X-100 per liter, the solution is vigorously agitated, and a(More)
Graphite furnace atomic absorption spectrometry (GFAAS) is increasingly becoming the method of choice for the determination of Pb in blood. The major GFAAS methods that have been published to date include: (i) direct introduction of the sample into the furnace; (ii) dilution with water, Triton X-100 or acid; (iii) deproteinization with nitric acid; (iv)(More)