Particular problems encountered in trace metal analysis of plant material by atomic absorption spectrometry

Evaluation of X‐Ray Fluorescence Spectroscopy as a Tool for Nutrient Analysis of Pea Seeds

“…Additionally, for all analytes, the ratio standard error of prediction (SEP)/SEC was <1.5. Inaccuracy for K and Ca concentrations may be explained by the fact that appreciable content of silica in colloidal form has been reported in plant specimens, leading to lack of complete recovery of some elements due to the binding of analytes with silica residue (Hoenig and De Borger, 1983).…”

Organic elemental analysis

“…Hoenig et al (64) studied various digestion methods for trace element analysis of plant materials by atomic absorption spectrometry; digestion by H2S04-HN03-H202 gave complete recovery of As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Sb, Tl, and Zn. Hamze et al (65) evaluated six procedures for determining Ca, K, Mg, and Na in citrus leaves and found digestion with HN03-H2S04-HC104 (9:2:2) to be most effective.…”

Acid and EDTA blanching effects on the essential element content of mushrooms (Agaricus bisporus)

“…The temperature of dry ashing has to be chosen in such a way that the organic matter is completely eliminated without causing any loss of the analyte compounds through volatilisation or incorporation in the acid-insoluble residue. 9 O È zdemir has developed a controlled ashing method for copper and zinc in mushroom samples; the method was applied to different mushroom samples, and recoveries were found to be higher than 90%. 10 We have studied the effects of different concentrations of citric acid and EDTA on the essential metals Cu, Fe, Mn and Zn in fresh mushrooms (A bisporus) during blanching, and our results are reported in this paper.…”