| Full text | |
| Author(s): |
Barletta, Juliana Y.
[1]
;
de Lima Gomes, Paulo C. F.
[1]
;
dos Santos-Neto, Alvaro J.
[1]
;
Lancas, Fernando M.
[1]
Total Authors: 4
|
| Affiliation: | [1] Univ Sao Paulo, Inst Chem Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | JOURNAL OF SEPARATION SCIENCE; v. 34, n. 11, p. 1317-1325, JUN 2011. |
| Web of Science Citations: | 20 |
| Abstract | |
In this article, a novel polydimethylsiloxane/activated carbon (PDMS-ACB) material is proposed as a new polymeric phase for stir bar sorptive extraction (SBSE). The PDMS-ACB stir bar, assembled using a simple Teflon (R)/glass capillary mold, demonstrated remarkable stability and resistance to organic solvents for more than 150 extractions. The SBSE bar has a diameter of 2.36 mm and a length of 2.2 cm and is prepared to contain 92 mu L of polymer coating. This new PDMS-ACB bar was evaluated for its ability to determine the quantity of pesticides in sugarcane juice samples by performing liquid desorption (LD) in 200 mu L of ethyl acetate and analyzing the solvent through gas chromatography coupled with mass spectrometry (GC-MS). A fractional factorial design was used to evaluate the main parameters involved in the extraction procedure. Then, a central composite design with a star configuration was used to optimize the significant extraction parameters. The method used demonstrated a limit of quantification (LOQ) of 0.5-40 mu g/L, depending on the analyte detected; the amount of recovery varied from 0.18 to 49.50%, and the intraday precision ranged from 0.072 to 8.40%. The method was used in the analysis of real sugarcane juice samples commercially available in local markets. (AU) | |
| FAPESP's process: | 05/59360-0 - Miniaturization of analytical instrumentation for separation techniques: sample preparation and printing of result |
| Grantee: | Fernando Mauro Lanças |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 07/03844-4 - Simultaneous analysis of multi-residue antibiotics in water and sediments by headspace bar sorptive extraction with in situ derivatization coupled to GC / MS |
| Grantee: | Paulo Clairmont Feitosa de Lima Gomes |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |