[Organic pollutant residues of different origins in Navarra]. / Residuos de contaminantes orgánicos de diferentes orígenes en Navarra.

An analysis was made of residues of polychlorobyphenyls and trihalomethanes through GC-ECD and of herbicides through HPLC-PAD in samples proceeding from Navarra. Polychlorobyphenyls were detected (0.30 +/- 0.05 and 0.11 +/- 0.05 microg/l) in two of the 106 water samples analysed. Sixty-six food samples were analysed, and polychlorobyphenyls were only found in 8 samples of trout (dissimilar to dioxins: 21-194 microg/kg of fat; similar to dioxins: 41-139 microg/kg of fat). Of 107 fat samples analysed, polychlorobyphenyls dissimilar to dioxins were detected in two (27 +/- 5 and 30 +/- 5 microg/kg). Out of a total of 94 feed samples analysed, polychlorobyphenyls were detected in all the samples (12) of feed for aquaculture and their raw materials; the concentration of polychlorobyphenyls dissimilar to dioxins varied by an interval of 8-247 microg/kg of fat; polychlorobyphenyls similar to dioxins, between 18 and 107 microg/kg of fat. Contamination by polychlorobyphenyls of the fish from aquaculture could be due to the feed used in these exploitations. The average of trihalomethanes in the waters of the southern zone of Navarra (44 +/- 4 microg/l) was higher than those of the middle zone (16 +/- 1 microg/l) and the mountain zone (12 +/- 1 microg/l). The concentration of 99% of the samples fulfilled the norms on halomethanes. A relation was observed between muddiness and the concentration of trihalomethanes. Herbicide (cianazine) was only detected in one of the 135 samples of water analysed, with a concentration of (0.4 +/- 0.2 microg/l) which exceeded the established limit. The use of confirmation techniques (GC-MS, HPLC-MS/MS) would make it possible to validate these results and to expand the number of compounds analysed.

Residuos de contaminantes orgánicos de diferentes orígenes en Navarra / Organic pollutant residues of different origins in Navarra

Se analizaron residuos de policlorobifenilos, de trihalometanos mediante GC-ECD y de herbicidas mediante HPLC-PAD en muestras procedentes de Navarra.Se detectó policlorobifenilos (0,30 ± 0,05 y 0,11 ± 0,05 µg/l) en dos de las 106 aguas analizadas. Se analizó 66 muestras de alimentos, y sólo se halló policlorobifenilos en 8 muestras de trucha (no similares a dioxinas: 21-194 µg/kg de grasa; similares a dioxinas: 41-139 µg/kg de grasa). De 107 grasas analizadas, se encontró policlorobifenilos no similares a dioxinas en dos de ellas (27 ± 5 y 30 ± 5 µg/kg). De un total de 94 piensos, se detectó policlorobifenilos en todas las muestras (12) de pienso para acuicultura y sus materias primas; la concentración de policlorobifenilos no similares a dioxinas varió en el intervalo 8-247 µg/kg de grasa; la de los similares a dioxinas, entre 18 y 107 µg/kg de grasa. La contaminación por policlorobifenilos del pescado de acuicultura pudo deberse a los piensos utilizados en estas explotaciones.La concentración media de trihalometanos en las aguas de la Ribera de Navarra (44 ± 4 µg/l) fue superior a la de la zona media (16 ± 1 µg/l) y a la de la montaña (12 ± 1 µg/l). La concentración del 99% de las muestras cumple la normativa sobre halometanos. Se observó una relación entre la turbidez y la concentración de trihalometanos.Sólo se detectó un herbicida (cianazina) en una de las 135 muestras de agua analizadas, con una concentración (0,4 ± 0,2 µg/l) que superaba el límite establecido.La utilización de técnicas confirmatorias (GC-MS, HPLC-MS/MS) permitiría convalidar estos resultados, y ampliar el número de compuestos analizados

An analysis was made of residues of polychlorobyphenyls and trihalomethanes through GC-ECD and of herbicides through HPLC-PAD in samples proceeding from Navarra. Polychlorobyphenyls were detected (0.30 ± 0.05 and 0.11 ± 0.05 µg/l) in two of the 106 water samples analysed. Sixty-six food samples were analysed, and polychlorobyphenyls were only found in 8 samples of trout (dissimilar to dioxins: 21-194 µg/kg of fat; similar to dioxins: 41-139 µg/kg of fat). Of 107 fat samples analysed, polychlorobyphenyls dissimilar to dioxins were detected in two (27 ± 5 and 30 ± 5 µg/kg). Out of a total of 94 feed samples analysed, polychlorobyphenyls were detected in all the samples (12) of feed for aquaculture and their raw materials; the concentration of polychlorobyphenyls dissimilar to dioxins varied by an interval of 8-247 µg/kg of fat; polychlorobyphenyls similar to dioxins, between 18 and 107 µg/kg of fat. Contamination by polychlorobyphenyls of the fish from aquaculture could be due to the feed used in these exploitations. The average of trihalomethanes in the waters of the southern zone of Navarra (44 ± 4 µg/l) was higher than those of the middle zone (16 ± 1 µg/l) and the mountain zone (12 ± 1 µg/l). The concentration of 99% of the samples fulfilled the norms on halomethanes. A relation was observed between muddiness and the concentration of trihalomethanes. Herbicide (cianazine) was only detected in one of the 135 samples of water analysed, with a concentration of (0.4 ± 0.2 µg/l) which exceeded the established limit. The use of confirmation techniques (GC-MS, HPLC-MS/MS) would make it possible to validate these results and to expand the number of compounds analysed