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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

On-line solid-phase extraction of pharmaceutical compounds from wastewater treatment plant samples using restricted access media in column-switching liquid chromatography-tandem mass spectrometry

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Marasco Junior, Cesar A. [1] ; Sartore, Douglas M. [2] ; Lamarca, Rafaela S. [1] ; da Silva, Bianca F. [1, 3] ; Santos-Neto, Alvaro J. [2] ; Gomes, Paulo Clairmont F. de Lima [1]
Total Authors: 6
[1] Sao Paulo State Univ UNESP, Natl Inst Alternat Technol Detect Toxicol Evaluat, Inst Chem, BR-14800060 Araraquara, SP - Brazil
[2] Univ Sao Paulo, Sao Carlos Inst Chem, BR-13566590 Sao Carlos, SP - Brazil
[3] Univ Florida, Dept Physiol Sci, Coll Vet Med, POB 490, Gainesville, FL 32601 - USA
Total Affiliations: 3
Document type: Journal article
Web of Science Citations: 0

An on-line solid phase extraction using a lab-made restricted access media (RAM) was developed as sample preparation procedure for determination of the pharmaceutical compounds caffeine (CAF), carbamazepine (CBZ), norfloxacin (NOR), ciprofloxacin (CIP), fluoxetine (FLX) and venlafaxine in wastewater treatment plant samples by liquid chromatography-tandem mass spectrometry (LC-MS/MS). This method is suitable for use in routine of analysis, avoiding cross-contamination and requiring only a small sample volume (50 mu L), with minimal handling. The method was validated according to international guidelines. The chromatographic efficiency was evaluated using peak resolution and asymmetry parameters. Carryover was also evaluated, in order to ensure reliability of the analysis and the ability to reuse the cartridge. Satisfactory linearity (r2 > 0.99) was obtained for all the compounds. The intra- and inter-day precision values were lower than 5.79 and 14.1%, respectively. The limits of detection ranged from 0.01 to 3 mu g L-1 and the limits of quantification were from 0.1 to 5 mu g L-1. The method was applied to 20 environmental wastewater samples, with caffeine being the most widely detected compound, at the highest concentration of 392 mu g L-1, while other compounds were detected in fewer samples at lower concentrations (up to 9.60 mu g L-1). The lab-made modification is a cheaper option for on-line sample preparation, compared to commercially available on-line SPE cartridges and RAM columns. Moreover, a highthroughput procedure was achieved, with an analysis time of 16 min including sample preparation and chromatographic separation. The same RAM column was applied over 200 injections including method optimization, validation and application in wastewater samples without loss of analytical response. (AU)

FAPESP's process: 18/22393-8 - Biochar applied in the removal of emerging contaminants present in wastewater
Grantee:Paulo Clairmont Feitosa de Lima Gomes
Support type: Regular Research Grants
FAPESP's process: 18/11700-7 - Determination of pharmaceuticals in wastewater
Grantee:César Augusto Marasco Júnior
Support type: Scholarships in Brazil - Master
FAPESP's process: 16/03369-3 - Development of paper-based microfluidic devices for pharmaceuticas analysis in wastewaters.
Grantee:Paulo Clairmont Feitosa de Lima Gomes
Support type: Regular Research Grants
FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support type: Research Projects - Thematic Grants