Pinochet Hugo, Tessini Catherine, Bravo Manuel, Quiroz Waldo, De Gregori Ida
Laboratorio de Química Analítica y Ambiental, Instituto de Química, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2950, P.O. Box 4059, Valparaíso, Chile.
Environ Monit Assess. 2009 Aug;155(1-4):341-53. doi: 10.1007/s10661-008-0439-7. Epub 2008 Jul 24.
Tributyltin and its degradation products, mono-and dibutyltin have been determined in sediments collected in some representative sites in San Vicente Bay, Chile. The organic matter contents of sediments and water collected simultaneously from the same sampling sites were also determined. High levels of total organic carbon were found in sediments, especially in those from the northern part of the bay (1.80-8.87%). Good correlations were found between total organic carbon and the oxidizable and refractory carbon fractions. Among the butyltin species determined, TBT presented the highest levels, ranging from 14 to 1,560 ng Sn g(-1) dry weight. Concentration ratios of TBT to DBT ranged between 1.33 and 3.10, showing a high degree of contamination in sediments of this Chilean bay. All data obtained were analysed by the chemometric method of principal components analysis. A strong correlation was found between TBT and DBT concentrations in sediments, the different organic matter contents in sediments and water. In marine organisms only TBT was detected, containing the filterer organism Semele solida higher level than Perumytilus purpuratus and Pyura chilensis (220, 150 and 120 ng Sn g(-1) dry weight, respectively). For the alga Rodoficea iridae the TBT concentration was 60 ng Sn g(-1) dw. Comparatively, these values are higher than those reported for the same kind of marine organisms worldwide. The different samples from San Vicente Bay were found to be contaminated by TBT. This contamination can be attributed to the different anthropogenic activities taking place in the bay.
在智利圣维森特湾一些具有代表性的地点采集的沉积物中，已测定了三丁基锡及其降解产物单丁基锡和二丁基锡。同时还测定了从相同采样点采集的沉积物和水体中的有机物含量。沉积物中发现了高水平的总有机碳，尤其是在海湾北部的沉积物中（1.80 - 8.87%）。总有机碳与可氧化碳和难熔碳组分之间存在良好的相关性。在所测定的丁基锡物种中，三丁基锡含量最高，范围为14至1560 ng Sn g(-1)干重。三丁基锡与二丁基锡的浓度比在1.33至3.10之间，表明该智利海湾的沉积物受到高度污染。所获得的所有数据均通过主成分分析的化学计量方法进行分析。沉积物中三丁基锡和二丁基锡的浓度、沉积物和水体中不同的有机物含量之间存在很强的相关性。在海洋生物中仅检测到三丁基锡，滤食性生物Semele solida中的含量高于紫贻贝和智利海鞘（分别为220、150和120 ng Sn g(-1)干重）。对于藻类Rodoficea iridae，三丁基锡浓度为60 ng Sn g(-1)干重。相比之下，这些值高于全球报道的同类海洋生物的值。发现圣维森特湾的不同样本受到三丁基锡的污染。这种污染可归因于海湾中发生的不同人为活动。
