Analytical Sciences

Abstract − Analytical Sciences, 22(6), 911 (2006).

Cloud Point Extraction Preconcentration of Manganese(II) from Natural Water Samples Using 1-Phenyl-3-methyl-4-benzoyl-5-pyrazolone and Triton X-100 and Determination by Flame Atomic Absorption Spectrometry
Zhimei SUN,*,** Pei LIANG,* Qiong DING,* and Jing CAO*
*Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
**Department of Chemistry & Biology, Huainan Normal University, Huainan 232001, P. R. China
The possibility was investigated by using 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) as the chelating reagent for separation and preconcentration of manganese(II) by cloud point extraction (CPE) and subsequent determination by flame atomic absorption spectrometry (FAAS). The effects of experimental conditions such as pH, concentration of chelating agent and surfactant, equilibration temperature and time on cloud point extraction were studied. Under the optimum conditions, preconcentration of 10 ml of sample solution permitted the detection of 1.45 ng mL-1 of manganese with an enrichment factor of 20. The proposed method was applied to the determination of trace manganese in water samples with satisfactory results.