Analysis of organic micropollutant in water through combining extraction methods and high resolution chromatographic methods

• Grant number: 96/09269-5
• Support type: Research Projects - Thematic Grants
• Duration: November 01, 1997 - December 31, 2004
• Field of knowledge: Physical Sciences and Mathematics - Chemistry
• Principal Investigator: Fernando Mauro Lanças
• Grantee: Fernando Mauro Lanças
• Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated grant(s): 99/03276-8 - Open tubular SFC determination of steroid hormones in biological samples, AR.EXT

Abstract

The determination of organic substances in water commonly involves the isolation of compounds of interest and subsequent separation through a chromatography technique. "On-line” techniques, which combine the preparation of the sample and the separation/detection in a single analytical montage, are relatively new. The analysis of volatile substances has generally been carried out through the coupling between a sweep technique of the analytes with the help of a gas ("purge"), its imprisonment in an adsorbant ("trap") and subsequent thermal desorption with the introduction of the desorbed analytes into a chromatograph column. This technique, generally called "purge-and-trap", permits many organic pollutants detected at the level of ppt (parts per trillion). For the analysis of semi-volatile compounds, the extraction in solid phase (SPE) is generally preferred in relation to liquid-liquid extraction, given that it offers several benefits such as the use of small quantities of sample, is not very troublesome, uses a small amount of organic solvent, an permits a greater enrichment of the compounds of interest. For the elucidation of the presence of certain pollutants mass spectrometry coupled with chromatographic techniques have been widely used. In the present decade, various interfaces were developed aimed at the "on-line" transference of the organic solvent used to dissolve the analyte of interest in an enrichment cartridge for the gas chromatograph system, permitting the "on-line" SPE-CGC coupling. (AU)

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BARRIONUEVO, WILMA REGINA; LANÇAS, FERNANDO MAURO. Extração em fase sólida (SPE) e micro extração em fase sólida (SPME) de piretróides em água. Química Nova, v. 24, n. 2, p. 172-175, mar.-abr. 2001.

PINTO, JAIR S. S.; CAPPELARO, ESMERALDO A.; LANÇAS, FERNANDO MAURO. Design and construction of an on-line SPE-SFE-CGC system. Journal of the Brazilian Chemical Society, v. 12, n. 2, p. 192-195, Mar.-Apr. 2001.

ELAINE A. A. F. GOBATO; FERNANDO M. LANÇAS. Comparação entre injeção na coluna ("on-column") e headspace dinâmico na determinação de benzeno, tolueno e xilenos (BTX) em amostras de água. Química Nova, v. 24, n. 2, p. -, Abr. 2001.

BARRIONUEVO, WILMA REGINA; LANÇAS, FERNANDO MAURO. Solid-Phase Microextraction of Pyrethroid Pesticides from Water at Low and Sub-ppt Levels at Different Temperatures. Journal of High Resolution Chromatography, v. 23, n. 7/8, p. 485-488, Aug. 2000.