| Author | dc.contributor.author | Rocco, Gabriela | |
| Author | dc.contributor.author | Toledo, Carla | es_CL |
| Author | dc.contributor.author | Ahumada, Inés | es_CL |
| Author | dc.contributor.author | Sepúlveda, Betsabet | es_CL |
| Author | dc.contributor.author | Cañete, Alvaro | es_CL |
| Author | dc.contributor.author | Richter Duk, Pablo | es_CL |
| Admission date | dc.date.accessioned | 2010-01-14T20:47:23Z | |
| Available date | dc.date.available | 2010-01-14T20:47:23Z | |
| Publication date | dc.date.issued | 2008-06-06 | |
| Cita de ítem | dc.identifier.citation | JOURNAL OF CHROMATOGRAPHY A, Volume: 1193, Issue: 1-2, Pages: 32-36, 2008 | en_US |
| Identifier | dc.identifier.issn | 0021-9673 | |
| Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/120853 | |
| Abstract | dc.description.abstract | An efficient continuous pressurized solvent extraction (PSE) method assisted by ultrasound energy was
developed for the extraction of polychlorinated biphenyls (PCBs) from biosolids. Analytes were determined
in the extracts by gas chromatography–mass spectrometry in selected ion monitoring (SIM) mode.
A screening-type experimental design pointing to dynamic extraction time as the only significant variable
in the extraction processwas carried out to optimize PCB extraction from the biosolids. Final selected
conditions for PSE were extraction temperature, 50 ◦C; static extraction time, 0 min; and dynamic extraction
time, 30 min. Recovery of the PSE method was 73%, which was significantly improved (103%) when
PSE was assisted with 30-min ultrasound (US-PSE). Precision of the overall method, expressed as relative
standard deviation, was 3.6% and the detection limit was 0.037 mg/kg. The method was applied to the
determination of PCBs in biosolids from different water treatment plants from central Chile. | en_US |
| Patrocinador | dc.description.sponsorship | The authors thank to FONDECYT (grants 1070616 and 1050288)
for financial support and to CEPEDEQ for facilities given for carrying
out the GC-MS determinations. | en_US |
| Lenguage | dc.language.iso | en | en_US |
| Publisher | dc.publisher | ELSEVIER SCIENCE BV | en_US |
| Keywords | dc.subject | PCBs | en_US |
| Título | dc.title | Determination of polychlorinated biphenyls in biosolids using continuous ultrasound-assisted pressurized solvent extraction and gas chromatography–mass spectrometry | en_US |
| Document type | dc.type | Artículo de revista | |
