Instituto Argentino de Oceanografía (IADO), Universidad Nacional del Sur (UNS-CONICET), Bahía Blanca, Argentina.
Departamento de Química, Instituto de Química del Sur, INQUISUR (UNS-CONICET), Sección Química Analítica, Universidad Nacional del Sur, Av. Alem 1253, B8000CPB, Bahía Blanca, Argentina.
Arch Environ Contam Toxicol. 2018 May;74(4):645-655. doi: 10.1007/s00244-017-0494-6. Epub 2018 Jan 3.
The goal of this study was to improve an already established reference method, such as the one devoted to organotin compounds determination (Reference Method for Marine Pollution Studies, No. 59, UNEP). The proposed upgrade consists of replacing the mechanical shaking by ultrasound energy and applying low temperature throughout the whole procedure. The optimization of the new operational conditions was performed by using a factorial design. Quality control was performed using a certified sediment reference material (PACS-2) for sediments (82.5-97% of recovery) and recoveries on spiked samples for suspended particulate matter (SPM) and mussels (94-100%). The proposed procedure was applied to surface sediment samples, SPM, and native bivalve mollusks (Brachidontes rodriguezii) collected in Bahia Blanca estuary, a very industrialized zone. The relative standard deviation (RSD %) of the environmental samples were less than 7.9%. It is important to note that the proposed procedure reduced the sample pretreatment time about seven times.
本研究的目的是改进已建立的参考方法，例如用于有机锡化合物测定的方法（UNEP 海洋污染研究参考方法第 59 号）。所提出的升级包括用超声能量替代机械摇动，并在整个过程中应用低温。通过使用析因设计来优化新的操作条件。使用沉积物标准物质（PACS-2）对沉积物（回收率为 82.5-97%）和悬浮颗粒物（SPM）和贻贝类（94-100%）进行加标样品的回收率进行质量控制。所提出的程序应用于表面沉积物样品、SPM 和在布宜诺斯艾利斯省 Bahia Blanca 河口采集的天然双壳类软体动物（Brachidontes rodriguezii）。环境样品的相对标准偏差（RSD%）小于 7.9%。值得注意的是，所提出的程序将样品预处理时间缩短了约七倍。
