Aquatic passive sampling of a short-term thiacloprid pulse with the Chemcatcher: impact of biofouling and use of a diffusion-limiting membrane on the sampling rate.
J Chromatogr A
; 1203(1): 1-6, 2008 Aug 29.
Article
en En
| MEDLINE
| ID: mdl-18656882
ABSTRACT
We examined the performance of the Chemcatcher (University Portsmouth, UK) in two different configurations when used for the aquatic passive sampling of a 1-day pulse contamination with thiacloprid under field-relevant conditions. The configuration without diffusion-limiting membrane led to biofouling of the Empore disk receiving phase resulting in a fourfold reduction in analyte uptake compared to unfouled passive samplers. The sampling rate for the configuration with diffusion-limiting polyethersulfone membrane was also much lower than in a long-term exposure scenario, although no biofouling occurred. Both configurations of the Chemcatcher exhibited high variation in analyte uptake with up to 100% RSD. Short-term contamination events may be underestimated in passive sampling when the receiving phase is biofouled or a diffusion-limiting membrane is employed.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Piridinas
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Tiazinas
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Contaminantes Químicos del Agua
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Monitoreo del Ambiente
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Biopelículas
Idioma:
En
Revista:
J Chromatogr A
Año:
2008
Tipo del documento:
Article
País de afiliación:
Alemania