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Comparative analysis of dry ashing and wet digestion methods for the determination of trace and heavy metals in food samples

Authors: SHOKUNBI Olutayo

Publication Type: Journal article

Journal: Food Chemistry

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Abstract

This study compared the dry ashing and wet digestion methods of processing food samples for elemental
analysis. The concentrations of trace elements (manganese, iron, copper and zinc) and heavy metals
(chromium, cadmium, lead and nickel) were determined in varieties of samples classified as fruits, leafy
and fruity vegetables, tubers, legumes and cereals, obtained from Abeokuta, South-West, Nigeria. The
metal concentrations were determined using atomic absorption spectrophotometer according to standard
methods. The accuracy of the procedures was confirmed by spiking some samples and evaluating
their recoveries. The metal levels evaluated were relatively higher in the dry-ashed samples than the
wet-digested samples. However, the results showed non-significant differences in most data obtained
after processing with the two methods. The dry ashing method is recommended for digestion of food
items in these categories because: it involves lesser amount of chemical reagents and related hazards;
it requires simple equipment and achieved better recovery.

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SHOKUNBI,O. . (2015). Comparative analysis of dry ashing and wet digestion methods for the determination of trace and heavy metals in food samples, 173 (), 682-682.

SHOKUNBI,O. . "Comparative analysis of dry ashing and wet digestion methods for the determination of trace and heavy metals in food samples" 173, no (), (2015): 682-682.

SHOKUNBI,O. and . (2015). Comparative analysis of dry ashing and wet digestion methods for the determination of trace and heavy metals in food samples, 173 (), pp682-682.

SHOKUNBIO, . Comparative analysis of dry ashing and wet digestion methods for the determination of trace and heavy metals in food samples. 2015, 173 ():682-682.

SHOKUNBI,Olutayo , . "Comparative analysis of dry ashing and wet digestion methods for the determination of trace and heavy metals in food samples", 173 . (2015) : 682-682.

S.Olutayo , "Comparative analysis of dry ashing and wet digestion methods for the determination of trace and heavy metals in food samples" vol.173, no., pp. 682-682, 2015.

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