ABSTRACT
A method for the determination of water-soluble antimony (III) and antimony (V) in Leigongteng using ultrasound-assisted extraction by hydride generation inductively coupled plasma atomic emission spectrometry was developed in the present paper. Affecting parameters of ultrasound extraction, the pH of antimony species, the operation condition of hydride generation and inductively coupled plasma atomic emission spectrometry were investigated and optimized. The effect of coexisting ions on the determination of antimony was also investigated. The detection limits are 0.3 and 2.4 ng x mL(-1) for antimony (and antimony (V), respectively, and with RSD 3.9% for antimony (III) and 4.5% for antimony (V). The recovery is in the range of 93% to 105%.
Subject(s)
Antimony/analysis , Spectrophotometry, Atomic/methods , Tripterygium/chemistry , Ultrasonics , Antimony/chemistry , Antimony/isolation & purification , Calcium/analysis , Hydrogen-Ion Concentration , Oxidation-Reduction , Plant Extracts/analysis , Plant Extracts/chemistry , Plant Extracts/isolation & purification , Potassium/analysis , Reproducibility of Results , Sodium/analysis , Solubility , Water/chemistryABSTRACT
The separation of iron species, e. g. Fe2+ -Fe3+, Fe2+ -Fe(phen)3(2+), and Fe2+ -Fe3+, by mixing with complexing reagents of o-phenanthroline and EDTA, and Fe2+ -Fe3+ with o-phenanthroline was developed by capillary electrophoresis inductively coupled plasma atomic emission spectronetry (CE-ICP-AES). The effects of electrophoresis conditions such as voltage, buffer solution pH, and complex concentration on iron species are discussed. Satisfactory separation conditions for iron speciation have been acquired. Cations and anions, containing complexing agents, do not interfere in the separation of iron species. The method has advantage to CE-UV.
