The chemical composition of acid-oxidized, wet-ashed residues

Wet oxidation efficiencies of perchloric acid mixtures for various organic substances and the identities of residual matter

“…An aliquot of each concentrated fraction was diluted to its original concentration using the ultrafiltrate as the diluent. The complexation capacity of the diluted fractions was determined on duplicate 5.0-ml samples after buffering with sodium acetate [Chau et al (9)]. The complexation capacity of given molecular weight fractions was determined by the difference between the observed capacity of the fraction and that of the ultrafiltrate.…”

“…A previous study (9) somewhat parallels the present one, to the extent that it attempted to determine inorganic compositions after evaporation to dryness of nitric and perchloric acid wet-oxidized residues. The results of that study are of interest in conjunction with preparing organic samples for spectrographic analysis.…”

Effect of wet decomposition methods on the determination of cobalt, copper, selenium, and zinc in biological samples using electrophoresis

“…Their results show that compounds with iV-methyl, S-methyl, C-methyl, and pyridyl moieties are most resistant toward wet oxidation, and addition of certain ions such as V(V), Ce(III), and Co(II) can exert catalytic influences on certain wet oxidations. A somewhat parallel study to determine the inorganic compositions of nitric and perchloric acid wet-oxidized residues after evaporation to dryness was also reported (5). From an analytical point of view, it is important to find out the distribution of species that contain the trace elements of interest and, if possible, the identities of the species in the decomposed sample.…”