Determination of trace amounts of nickel by atomic-absorption spectrometry after carbonyl generation.
A sensitive and reliable method for the atomic-absorption spectrometric determination of micro-amounts of Ni in organic and inorganic samples has been developed, with separation of nickel by carbonyl generation. Foreign anions and cations do not interfere. Only metallic iron hampers the generation of Ni(CO)(4) but this interference can be avoided if the latter is formed in nitric acid medium. In the range 0.02-0.1 mug, Ni can be determined with a precision of about 10%. The detection limit of the proposed method is 10 ng in the aliquot used.
Alary
J
J
INSERM U57, Allée Camille Soula, 31320 Vigoulet Auzil, France.
Vandaele
J
J
Escrieut
C
C
Haran
R
R