Dorneles Paulo R, Lailson-Brito José, Fernandez Marcos A S, Vidal Lara G, Barbosa Lupércio A, Azevedo Alexandre F, Fragoso Ana B L, Torres João P M, Malm Olaf
Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, CCS, Universidade Federal do Rio de Janeiro, Brazil.
Environ Pollut. 2008 Dec;156(3):1268-76. doi: 10.1016/j.envpol.2008.03.007. Epub 2008 Apr 25.
In Brazil, there is no restriction to the use of organotins (OTs). Previous investigations have shown that hepatic SigmaSn in cetaceans is predominantly organic. Hepatic SigmaSn concentrations were determined by GFAAS in 67 cetaceans (13 species) that stranded on Rio de Janeiro (RJ) and Espirito Santo (ES) states. Concentrations (in ng/g wet wt.) of marine tucuxis (n=20) from the highly contaminated Guanabara Bay (in RJ) varied from 1703 to 9638. Concentrations of three marine tucuxi foetuses and one newborn calf (all from Guanabara Bay) varied between 431 and 2107. Contrastingly, the maximum level among 19 oceanic dolphins was 346, and 15 out of these 19 specimens presented concentrations below detection limit. The levels of Sn in six marine tucuxis from a less contaminated area (ES) varied from below detection limit to 744. Comparing to the literature, coastal cetaceans from Brazil appear to be highly exposed to OTs.
在巴西，有机锡（OTs）的使用没有限制。先前的调查表明，鲸类动物肝脏中的总锡（SigmaSn）主要是有机锡。通过石墨炉原子吸收光谱法（GFAAS）测定了67头搁浅在里约热内卢（RJ）和圣埃斯皮里图州（ES）的鲸类动物（13个物种）肝脏中的总锡浓度。来自污染严重的瓜纳巴拉湾（位于RJ）的20头海洋土库海豚的浓度（以纳克/克湿重计）在1703至9638之间。三头海洋土库海豚胎儿和一头新生幼崽（均来自瓜纳巴拉湾）的浓度在431至2107之间。相比之下，19头远洋海豚中的最高水平为346，这19个样本中有15个的浓度低于检测限。来自污染较轻地区（ES）的6头海洋土库海豚的锡含量在低于检测限至744之间。与文献相比，巴西沿海的鲸类动物似乎高度暴露于有机锡。
