Determination of trace zirconium and hafnium in basaltic rocks by inductively coupled plasma atomic emission spectrometry after chemical separation: an evaluation of two methods based on extraction chromatography
Xj. Yang et C. Pin, Determination of trace zirconium and hafnium in basaltic rocks by inductively coupled plasma atomic emission spectrometry after chemical separation: an evaluation of two methods based on extraction chromatography, ANALYST, 125(3), 2000, pp. 453-457
The determination of Zr and Hf in basaltic rocks by inductively coupled pla
sma atomic emission spectrometry after extraction chromatographic separatio
n is reported. Two different approaches were employed using tricaprylylmeth
ylammonium chloride (Aliquat 336) and N-benzoyl-N-phenylhydroxylamine (BPHA
) as stationary phases supported on inert porous polymeric substrates. The
major advantages of the separation schemes are simplicity and the easy sepa
ration of Zr and Hf from Ti, a major element in rocks. The BPHA approach is
superior to the Aliquat 336 approach with regard to sample preparation and
separation conditions. The method yields detection limits of 0.02 and 0.07
mu g g(-1) for Zr and Hf, respectively. The analytical results for interna
tional reference rock materials (BIR-1, W-2, BHVO-1) showed excellent agree
ment with literature values obtained by spark source mass spectrometry and
inductively coupled plasma mass spectrometry. The relative standard deviati
ons were in the range 2-4% for the samples analysed.