The Use of Two Extraction Procedures in Combination with Electrothermal AAS for Speciation of Inorganic Antimony in Natural Waters

作者：Hagarova Ingrid^*; Bujdos Marek; Matus Peter; Canecka Lucia

来源：Chemicke Listy, 2012, 106(2): 136-142.

For speciation of inorganic Sb before its determination by electrothermal AAS, two extractions were used. Solid phase extraction (SPE) with nanosized TiO2 as a sorbent was performed in separation/preconcentration of total inorganic Sb and subsequent direct sampling of TiO2 slurry for sample injection into a graphite tube. The cloud point extraction (CPE) with ammonium pyrrolidinecarbodithioate as a chelating agent and hydrogen-octylphenoxy-poly(oxyethylene) (Triton X-114) as a nonionic surfactant were used in selective separation/preconcentration of Sb(111). Main attention was paid to interference of coexisting ions in the extractions and to that of Sb(V) excess in the CPE separation/preconcentration of Sb(III). The accuracy of the optimized methods was checked by a certified reference material for trace elements in lake water. The optimized methods were used for speciation of inorganic Sb in natural waters.

• 出版日期2012