溶剂萃取-火焰原子吸收法测定自来水中微量钴  

Solvent Extraction-FAAS Determination of Trace Co in Water

作　　者：王晓[1] 区良益[1] 

机构地区：[1]广东省佛山市南海区南海发展股份有限公司,广东佛山528200

出　　处：《广东微量元素科学》2006年第4期53-55,共3页Trace Elements Science

摘　　要：以硫氰酸根离子为配位阴离子，甲基异丙酮为萃取剂萃取自来水中微量钴，将有机相加热蒸发萃取剂后，置于550℃高温炉中干法灰化，灰化后，加盐酸微热使残渣溶解，然后用火焰原子吸收光谱法测定钴。该法提高了灵敏度，回收率为95．0％～102．5％，相对标准偏差为1．58％～4．92％，检出限为0．014mg／L。A FAAS method for the determination of trace Co in water sample is reported. Co in water samples was extracted by his complex compound formed with KSCN using methyl isopropyl - ketone as extraction agent, the organic phase was treated by steam and 550℃ ashing, the surplus materials were digested by HCl, the Co in digest was determined using FAAS. The proposed method proved to be sensitive, the recovery is 95.0%～102.5%, the RSD is 1.58%～4.92%, the limit of detection for Co is 0.019 mg/L.

关 键 词：火焰原子吸收光谱法 微量钴 自来水 溶剂萃取 

分 类 号：O657.31[理学—分析化学]