ISSN:
1432-1130
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract Nickel speciation of fly ash by sequential extraction lacks specific identification of the chemical forms in the sulfidic nickel phase. A new voltammetric analysis of Ni3S2, NiS, and NiS2 in a carbon paste electrode is reported. Characteristic peaks were observed in acetate (pH 5) as the electrolyte; the anodic peak for Ni3S2 gave a linear dose response with microgram sensitivity. Reference compounds included heazlewoodite, millerite, commercial Ni3S2, NiS2, and NiS, but the latter was shown to be mainly the subsulfide. No Ni3S2 was found in two types of laboratory generated ash: an oil ash containing mainly soluble nickel and a high sulfur petroleum coke ash enriched with nickel.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/s002160051249