Ionic liquid-based hollow fiber supported liquid membrane extraction combined with thermospray flame furnace AAS for the determination of cadmium

• Published in: Mikrochimica acta (1966) Vol. 177; no. 1-2; pp. 53 - 58
• Main Authors: Zeng, Chujie, Hu, Yan, Luo, Jiwen
• Format: Journal Article
• Language: English
• Published: Vienna Springer Vienna 01-04-2012; Springer
• Subjects: Anabolic steroids; Analytical Chemistry; Cadmium; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Exact sciences and technology; Furnaces; Microengineering; Nanochemistry; Nanotechnology; Original Paper; Spectrometric and optical methods; Cd; Thermospray flame furnace atomic absorption spectrometry; Hollow fiber; Ionic liquid; Support; Microanalysis; Time; Thermospray; Liquid phase; Chemical enrichment; Sample preparation; Detection limit; pH; Standard deviation; Cadmium; Organic dithiocarbamate; Liquid liquid extraction; Sample; Propylene polymer; Use; Stirring; Interference; Liquid membrane; Concentration; Method; Flame spectrometry; Chelating agent; Microextraction; Room temperature; Atomic absorption spectrometry
• ISSN: 0026-3672; 1436-5073
• DOI: 10.1007/s00604-011-0748-3

We have developed a simple and effective method for hollow fiber liquid-phase microextraction of cadmium. It is based on the use of a room temperature ionic liquid (RTIL) and was coupled to thermospray flame furnace AAS. The RTIL was placed in the pores of a polypropylene hollow fiber (acting as a liquid membrane) and also used as the acceptor solution. Ammonium pyrrolidinedithiocarbamate (APDC) was used as the chelating agent. The effects of the concentration of APDC, the pH of samples, stirring rates, extraction time, and potential interferences were optimized to result in a detection limit of 9 ng L
−1
and an enrichment factor of 90. The relative standard deviation is 4.7% (at 0.5 ng mL
−1
, for
n
 = 5). The method was successfully applied to the determination of cadmium.
Figure
Schematic diagram of the TS-FF- AAS system.