On-Line Solid Phase Extraction and Simultaneous Determination of Hafnium and Zirconium by ICP–Atomic Emission Spectroscopy

Zirconium in modern analytical chemistry

“…Several papers under review deal with developing techniques for concentrating zirconium on a solid sorbent (Karami et al, 2006;Chang et al, 2008;Faghihian & Kabiri-Tadi, 2010). The detection limit of zirconium in waters and alloy is 0.14 μg•l −1 (lower than in the papers about cloud point extraction), according to Chang et al (2008).…”

“…A flow injection solid phase extraction was proposed for determining zirconium along with hafnium in waters, soil, and copper alloy (Karami et al 2006). The sorbent was octadecylsilica gel modified with quinalizarin.…”

Selective cloud point extraction and graphite furnace atomic absorption spectrometric determination of molybdenum (VI) ion in seawater samples

“…1,2,5,8-Tetrahydroxyanthracene-9,10-dione (QA) is often used as a chromogenic reagent for the determination of a large number of metals, particularly molybdenum(VI) [30][31][32][33]. The proposed analytical method is based on the formation of a hydrophobic complex of molybdenum(VI) with QA, which is subsequently separated from the bulk aqueous phase with a nonionic surfactant, prior to its determination by GFAAS.…”

Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry, and related techniques

“…Karami and co-workers 46 loaded quinalizarin (QA) on an octadecylsilica-polyethylene mini-column for the retention of Hf and Zr ions in complexed form. A 0.3 mol l À1 ammonium acetate buffer was used to provide suitable conditions for complexation and reproducibility.…”