Determination of rhodium in water samples using cloud point extraction (CPE) coupled with flame atomic absorption spectrometry (FAAS)
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- 作者：Kanchi Suvardhan ; Kailasa Suresh Kumar ; Dasari Rekha ; Pantrangam Subrahmanyam ; Kapuvedi Kiran ; Bellum Jayaraj ; Surasura Ramanaiah ; Kandhukuri Janardhanam and Pattium Chiranjeevi
- 关键词：Key words ; Rhodium ; 2 ; propylpiperidine ; 1 ; carbodithioate (2 ; PPC) ; cloud point extraction (CPE) ; TritonX ; 114 ; flame atomic absorption spectrometry (FAAS) and water samples.
- 刊名：Microchimica Acta
- 出版年：2007
- 出版时间：March, 2007
- 年：2007
- 卷：157
- 期：3-4
- 页码：237-244
- 全文大小：125 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Analytical Chemistry
Inorganic Chemistry
Physical Chemistry
Characterization and Evaluation Materials
Monitoring, Environmental Analysis and Environmental Ecotoxicology - 出版者：Springer Wien
- ISSN：1436-5073
文摘
Cloud point extraction was applied as a method for preconcentration of rhodium after formation of a complex with 2-propylpiperidine-1-carbodithioate (2-PPC), and later determined by flame atomic absorption spectrometry using TritonX-114 as surfactant. Rhodium was complexed with 2-PPC in an aqueous phase and kept for 15?min in a thermostatted bath at 40?°C. Separation of the two phases was accomplished by centrifugation for 15?min at 4000?rpm. The chemical variables affecting the cloud point extraction were optimized and successfully applied to rhodium determination in various water samples. Under optimized conditions, the preconcentration system (100?mL sample) permitted an enhancement factor of 50. The detection limits obtained under optimal conditions was 0.052?ng?mL?1. The extraction efficiency was investigated at different rhodium concentrations (7.0–42.0?μg?mL?1), and good recoveries (96.42–99.14%) were obtained using this method. It has been applied to the determination of rhodium in water and was compared with reported methods in terms of Student’s ‘t’-test and variance ratio ‘f’-test.