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A new sample preparation procedure based on tandem (that is, different diameter probe sonicators used in the same sample treatment) focused ultrasound (TFU) for mercury separation, preconcentration and back-extraction in aqueous solution from human urine has been developed. The urine is first oxidized with KMnO 4 /HCl/focused ultrasound (6mm probe). Secondly, the mercury is extracted and preconcentrated...
Bismuth as BiCl 4− and BH 4− ware successively retained in a column (150mm × 4mm, length × i.d.) packed with Amberlite IRA-410 (strong anion-exchange resin). This was followed by passage of an injected slug of hydrochloric acid resulting in bismuthine generation (BiH 3 ). BiH 3 was stripped from the eluent solution by the addition of a nitrogen flow and the...
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