title: [ICP-AES determination of Cu2+, Pb2+ and Cd2+ with adsorption behavior of potassium hexatitanate whisker].
abstract: A new method for the determination of free Cu2+, Pb2+ and Cd2+ in environmental sample using potassium hexatitanate whisker as a solid-phase extractant and inductively coupled plasma-atomic emission spectrometry (ICP-AES) as a sensitive detector has been developed. The adsorption rate of Cu2+, Pb2+ and Cd2+ by potassium hexatitanate whisker was 98% at pH 5.0, and Cu2+, Pb2+ and Cd2+ could be eluted from potassium hexatitanate whisker with HNO3 (C: 3 mol x L(-1)). The Cu2+, Pb2+ and Cd2+ in environmental samples were preconcentrated with potassium hexatitanate whisker and determined by ICP-AES, the detection limits of Cu2+, Pb2+ and Cd2+ (3sigma, n = 9) were 0.007 1, 0.006 8 and 0.007 1 microg x mL(-1), and the relative standard deviations (RSD) were 0.63%, 0.61% and 0.50%, respectively. The method was applied to the determination of analytes in real samples, such as chrysanthemum and loquat leaf. And good results were obtained (recoveries were 90%-102.9%). The results obtained indicate that the potassium hexatitanate whisker has good regenerate capability.
authors.affiliation: Department of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China. xuwanzhen1212@163.com
authors.forename: Wan-Zhen
authors.initials: WZ
authors.lastname: Xu
authors.forename: Chun-Xiang
authors.initials: CX
authors.lastname: Li
authors.forename: Ai-Qin
authors.initials: AQ
authors.lastname: Liu
authors.forename: Yong-Sheng
authors.initials: YS
authors.lastname: Yan