Dispersive liquid-liquid microextraction of cadmium(II) for preconcentration prior to flame atomic absorption spectrometric detection in water

作者：Soylak M^*; Unsal Y E

来源：Toxicological and Environmental Chemistry, 2012, 94(8): 1480-1489.

DOI：10.1080/02772248.2012.717625

• preconcentration
• cadmium(II)
• 2-(5-bromo-2-pyridylazo)-5-diethylamino-phenol
• dispersive liquid-liquid microextraction
• flame atomic absorption spectrometry
• natural waters

A dispersive liquid-liquid microextraction procedure for cadmium(II) as its 2-(5-bromo-2-pyridylazo)-5-diethylamino-phenol chelate is presented. Carbon tetrachloride and methanol were used as extraction and dispersive solvents, respectively. After phase separation, the preconcentrated-separated cadmium(II) is determined by flame atomic absorption spectrometry with a microinjection technique. The factors which affected the extraction efficiency, i.e. the pH of the sample solution and the volumes of reagent and sample were investigated. The effects of some alkali, alkali earth, and transition metal ions, and of some anions on the recovery of cadmium were also studied. A preconcentration factor of 250 was obtained for a sample volume of 50mL under optimum conditions. The method was validated by analysis of certified reference materials and applied to some water samples from Turkey.

• 出版日期2012