Preconcentration of Silver on Blue Algae Determination by Slurry Graphite Furnace Atomic Absorption Spectrometry

Abstract

Abstract: This work studied the ability and conditions of a pure blue algae to preconcentrate Ag ions of 10^-3level from 10～50 mLwater samples. This preconcentration is achieved by mixing 8mg of dried algae with 50 mLof a Ag containing solution and subsequent separation by centrifugation.The algae pellet is then suspended in 1mL of solution and analysed as a slurry by GFAAS.It is shown that after the algae are rinsed with 5%HCl solution, Ag adsorption on the alga is improved.The optimum pHrange of absorption extraction is between 4～6,and the absorption extraction efficiency is 88 ± 2%.After agitated with ultrasonic wave for 4 min,the preconcentration can come up to the highest recovery.

Key words: Algae, Preconcentration, Silver, Slurry, Graphite furnace

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TANG You-Wen, SONG Jian-Yi, MO Sheng-Jun. Preconcentration of Silver on Blue Algae Determination by Slurry Graphite Furnace Atomic Absorption Spectrometry[J]. Chem. J. Chinese Universities, 1995, 16(12): 1865.

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Preconcentration of Silver on Blue Algae Determination by Slurry Graphite Furnace Atomic Absorption Spectrometry

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