摘要
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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第12期1865-1867,共3页
Chemical Journal of Chinese Universities
关键词
银
蓝藻
原子吸收法
水样
Algae,Preconcentration,Silver,Slurry,Graphite furnace