蓝藻预富集－悬浮液进样GFAAS测定水中痕量银的研究

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

蓝藻预富集－悬浮液进样ＧＦＡＡＳ测定水中痕量银的研究汤又文，宋健怡，莫胜钧（华南师范大学化学系，广州，５１０６３１）关键词藻，富集，银，悬浮液，石墨炉痕量分析中，由于待测组分含量低，基体复杂，常常需要对待测组分进行预富集处理。共沉淀、电沉积、萃取与离...

This work studied the ability and conditions of a pure blue algae to preconcentrate Ag ions of 10￣(-3) level from 10～50 mL water samples. This preconcentration is achieved by mixing 8 mg of dried algae with 50 mL of a Ag containing solution and subsequent separation by centrifugation.The algae pellet is then suspended in 1 mL 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 pH range 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.