Electro Thermal Atomic Absorption Spectrophotometry (ET-AAS), is used for the determination of chromium (Cr) in a variety of environmental matrices.
The detection limit for the estimation of Cr is 2 pg absolute for a volume injection of 20 mul.
The precision of the method is established by analysing Cr from a synthetic mixture containing various elements in different qualities (0.5-10 ppm) and is found to be within ± 8%. The reliability of estimation is further assessed through the analysis of Standard Reference Materials (SRMs) of soil, hay, milk powder and lake sediment obtained from IAEA.
The total intake of Cr through air, water and food works out to be 54 mug/day for the adult population of Mumbai city.
The dietary intake through food is the major contributor to the total intake of Cr.
The concentration of Cr in atmospheric air and drinking water collected from different suburbs showed geometric mean concentrations of 0.09 mug/m3 and 0.3 mug/l, respectively.
The daily intake of Cr, though lower, is closer to the lower bound of the recommended value of 50-200 mug/day.
Mots-clés Pascal : Chrome, Eau potable, Dose journalière, Métal lourd, Epidémiologie, Analyse quantitative, Spectrométrie absorption atomique, Atomisation thermoélectrique, Détection, Sol, Foin, Lait, Sédiment, Lac, Inde, Asie, Homme, Contamination, Aliment, Source pollution, Exposition
Mots-clés Pascal anglais : Chromium, Drinking water, Daily dose, Heavy metal, Epidemiology, Quantitative analysis, Atomic absorption spectrometry, Thermoelectric atomization, Detection, Soils, Hay, Milk, Sediments, Lakes, India, Asia, Human, Contamination, Food, Pollution source, Exposure
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0499782
Code Inist : 002B03M01. Création : 19/02/1999.