TY - JOUR
T1 - Critical evaluation of fiber coatings for organotin determination by using solid phase microextraction in headspace mode
AU - Bravo M., Manuel
AU - Valenzuela S., Aníbal
AU - Fuentes P., Edwar
AU - Quiroz V., Waldo
N1 - Funding Information:
The authors gratefully acknowledge FONDECYT (Project 11080197). Aníbal Valenzuela thank CONICYT for the doctoral fellowship grant.
PY - 2012/2/3
Y1 - 2012/2/3
N2 - In the present work three different SPME fibers have been investigated for simultaneous determination of methyl-, butyl- and phenyltins by using gas chromatography-pulsed flame photometer detection (GC-PFPD). The optimal experimental conditions for each fiber were determined and the respective figures of merit were evaluated. All fiber evaluated presented similar limit of detection (sub ngL -1) and requires two internal standards to reach an acceptable repeatability. However, the CAR-PDMS fiber offers the best compromise between selectivity and sensibility for determination of organotins selected. The developed method was validated for analysis of certified reference material and spiked samples, obtaining satisfactory results. Finally, some contaminated samples were analyzed demonstrating the applicability of developed method for determination of organotin compounds in the environment and for monitoring their biochemical cycle.
AB - In the present work three different SPME fibers have been investigated for simultaneous determination of methyl-, butyl- and phenyltins by using gas chromatography-pulsed flame photometer detection (GC-PFPD). The optimal experimental conditions for each fiber were determined and the respective figures of merit were evaluated. All fiber evaluated presented similar limit of detection (sub ngL -1) and requires two internal standards to reach an acceptable repeatability. However, the CAR-PDMS fiber offers the best compromise between selectivity and sensibility for determination of organotins selected. The developed method was validated for analysis of certified reference material and spiked samples, obtaining satisfactory results. Finally, some contaminated samples were analyzed demonstrating the applicability of developed method for determination of organotin compounds in the environment and for monitoring their biochemical cycle.
KW - Experimental design
KW - Gas chromatography-pulsed flame photometric detection (GC-PFPD)
KW - Organotin compounds
KW - Solid phase microextraction (SPME)
UR - http://www.scopus.com/inward/record.url?scp=84855833275&partnerID=8YFLogxK
U2 - 10.1016/j.chroma.2011.12.038
DO - 10.1016/j.chroma.2011.12.038
M3 - Article
C2 - 22209358
AN - SCOPUS:84855833275
SN - 0021-9673
VL - 1223
SP - 9
EP - 14
JO - Journal of Chromatography A
JF - Journal of Chromatography A
ER -