TY - JOUR

T1 - Comparison of stir bar sorptive extraction and membrane-assisted solvent extraction as enrichment techniques for the determination of pesticide and benzo[a]pyrene residues in Brazilian sugarcane juice

AU - Zuin, Vânia Gomes

AU - Schellin, Manuela

AU - Montero, Larisse

AU - Yariwake, Janete H.

AU - Augusto, Fabio

AU - Popp, Peter

N1 - Funding Information: The authors thank the research funding institutions Alexander von Humboldt (Germany) and CAPES (Brazil) for their financial support and fellowship.

PY - 2006/5/12

Y1 - 2006/5/12

N2 - The present work compares two modern and environmentally friendly enrichment techniques, stir bar sorptive extraction (SBSE) and membrane-assisted solvent extraction (MASE) for the determination of 18 organic contaminant residues in Brazilian sugarcane juice. Stir bar sorptive extraction and thermal desorption coupled to capillary gas chromatography-mass spectrometry using the selected ion monitoring mode [SBSE-TD-GC-MS(SIM)] and membrane-assisted solvent extraction combined with large volume injection [MASE-LVI-GC-MS(SIM)] methods were assessed taking into account the time of extraction [SBSE (3 h) and MASE (30 min)], the recoveries [SBSE (0.2-55.3%) and MASE (13.6-103.1%)], the repeatability [SBSE (0.3-19.2%) and MASE (2.6-18.4%)] and the limits of detection [SBSE (0.002-0.71 μg L-1) and MASE (0.004-0.56 μg L-1)] of the selected triazine, organochlorine and organophosphorus pesticides as well as benzo[a]pyrene in sugarcane juice. In general, faster analyses and much better analyte recovery results were achieved with MASE, whereas greater sensitivity and repeatability were obtained with SBSE. SBSE and MASE procedures were applied to the analysis of six sugarcane juice samples from the city São Carlos, in the state of São Paulo, Brazil. A comparison of the results of the pesticide and benzo[a]pyrene residues at μg L-1 level obtained by the two methods showed good agreement.

AB - The present work compares two modern and environmentally friendly enrichment techniques, stir bar sorptive extraction (SBSE) and membrane-assisted solvent extraction (MASE) for the determination of 18 organic contaminant residues in Brazilian sugarcane juice. Stir bar sorptive extraction and thermal desorption coupled to capillary gas chromatography-mass spectrometry using the selected ion monitoring mode [SBSE-TD-GC-MS(SIM)] and membrane-assisted solvent extraction combined with large volume injection [MASE-LVI-GC-MS(SIM)] methods were assessed taking into account the time of extraction [SBSE (3 h) and MASE (30 min)], the recoveries [SBSE (0.2-55.3%) and MASE (13.6-103.1%)], the repeatability [SBSE (0.3-19.2%) and MASE (2.6-18.4%)] and the limits of detection [SBSE (0.002-0.71 μg L-1) and MASE (0.004-0.56 μg L-1)] of the selected triazine, organochlorine and organophosphorus pesticides as well as benzo[a]pyrene in sugarcane juice. In general, faster analyses and much better analyte recovery results were achieved with MASE, whereas greater sensitivity and repeatability were obtained with SBSE. SBSE and MASE procedures were applied to the analysis of six sugarcane juice samples from the city São Carlos, in the state of São Paulo, Brazil. A comparison of the results of the pesticide and benzo[a]pyrene residues at μg L-1 level obtained by the two methods showed good agreement.

KW - Benzo[a]pyrene

KW - Membrane-assisted solvent extraction

KW - Organochlorine and organophosphorus pesticides

KW - Pesticide metabolites

KW - Stir bar sorptive extraction

KW - Sugarcane juice

KW - Triazine

KW - Chemistry

UR - http://www.scopus.com/inward/record.url?scp=33646091280&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/98adc50f-491a-3210-8e8a-6a8e59ee43f4/

U2 - 10.1016/j.chroma.2006.03.035

DO - 10.1016/j.chroma.2006.03.035

M3 - Journal articles

C2 - 16597442

AN - SCOPUS:33646091280

VL - 1114

SP - 180

EP - 187

JO - Journal of Chromatography A

JF - Journal of Chromatography A

SN - 0021-9673

IS - 2

ER -