The analysis was done by flame atomic absorption spectrometry using dry ashing or wet digestion.
In general, dry ashing methods may present poorer accuracy and provide lower analyte recovery when compared with acid digestion methods [23, 24].
Table-1: Metal contents ((mu)g/g) in tobacco and cigarette samples that determined after wet and dry ashing (mean +- SD), n = 3.
Mineral analysis was performed on bean leaves and fresh bean grains after dry ashing .
Mineral analysis of the bean leaves and fresh bean grains has shown that both have comparatively higher iron and zinc content compared to dry bean grains though minor losses of minerals might have occurred due to the dry ashing method used instead of wet ashing .
The principal sample preparation methods used for V determination in petroleum and petroleum products by spectroanalytical techniques, besides direct analysis, are dilution with organic solvents, dilution in three-component systems (emulsion or micro-emulsion), dry ashing and wet acid digestion.
Dry ashing is used for the almost complete elimination of organic materials prior to analyte determination.
The sample preparation method used in this study for determination of V in asphaltite by spectroanalytical technique includes dry ashing and wet acid microwave digestion.
Traditional dry ashing
test methods require hours in a muffle furnace to oxidize sample material.
Other topics covered include determination of dry matter content of plant tissue, dry ashing
by high-temperature oxidation, wet digestion with nitric and perchloric acids, and microwave digestion in open and closed vessels (Chap.
Therefore, aim of this study was to compare three main digestion methods; microwave-assisted wet digestion, wet-acid digestion on hot plate and dry ashing mineralization in muffle furnace for the maximum recovery of Pb from 28 poultry feed samples of 7 commercial brands from Pakistan.
Prior to analysis, digestion was made using three main digestion procedures; dry ashing mineralization in muffle furnace, microwave-assisted wet digestion and wet- acid digestion on hot plate.