Determination of mineral and trace elements in total diet by inductively coupled plasma atomic emission spectrometry : comparison of microwave-based digestion and pressurized ashing systems using different acid mixtures.
Rio symposium on atomic spectrometry. Caracas VEN, 1994/11/06.
The effectiveness of different acid mixtures for the de-mineralization of total diet samples of different origin and composition by means of a closed microwave-based technique and a pressurized-ashing technique were investigated.
The aim was to obtain complete acid solubilization for the subsequent accurate determination of Al, Ca, Cu, Fe, K, Mg, Na, P and Zn by means of inductively coupled plasma atomic emission spectrometry (ICP-AES).
The regions and population groups were selected from the high mountain valleys, where a high incidence of stomach cancer exists, and a low altitude valley at the foot of the Andes, which is a low stomach cancer incidence region, both located in the state of Tachira, Venezuela.
Total diets including breakfast, lunch, supper, snacks and drinks from the whole-day intake of 140 adults were collected.
The collection of the total diet was made according to the double-portion technique.
The results of the mean daily intake of the population investigated showed for the high mountain valleys (high stomach cancer incidence area, n=77) as compared with the low altitude valleys (low stomach cancer incidence area, n=33) significantly higher daily intake with respect to Na (2082 versus 1471 mg), K (1190 versus 731 mg), P (640 versus 381 mg) and a significantly lower daily intake with respect to Ca (925 versus 1379 mg) and Cu (2.78 versus 4.66 mg).
Mots-clés Pascal : Analyse chimique, Analyse multiélément, Spectrométrie ICP, Spectrométrie émission, Préparation échantillon, Digestion acide, Hyperfréquence, Etude comparative, Elément trace, Oligoélément, Elément minéral, Régime alimentaire, Alimentation, Facteur milieu, Altitude, Venezuela, Amérique du Sud, Amérique, Tumeur maligne, Estomac pathologie, Appareil digestif pathologie
Mots-clés Pascal anglais : Chemical analysis, Multicomponent analysis, Inductive coupling plasma spectrometry, Emission spectrometry, Sample preparation, Acid digestion, Microwave, Comparative study, Trace element, Trace element (nutrient), Inorganic element, Diet, Feeding, Environmental factor, Altitude, Venezuela, South America, America, Malignant tumor, Gastric disease, Digestive diseases
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0435520
Code Inist : 002B29B. Création : 01/03/1996.