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The devastating effects of Organotins (OTCs) have been well documented in the past. They are considered to be one of the most hazardous pollutants affecting aquatic ecosystems today. As such, a directive was passed in 2008 in which all ships are required to have the OTCs removed or adequately sealed by an approved method. Nevertheless, their high persistence will mean that they will pose a risk for a long time in the future.

Most of the focus has been put onto tributyltin (TBT) as this was used the most. However, with improvements in methodology and instrumentation, there has been an increased awareness of triphenyltin (TPhT). This compound was used nearly as much as TBT in some parts of the World and it is also of extra concern as it is known to bioaccumulate in the fatty tissues of the shell fish and fish. Both are still found in many soils, sediments and waters although phenyltins are generally found in lower concentrations. In major shipping lanes, OTCs find their way into the sediment which is frequently termed as the final sink. However, they do have the ability to desorb from the sediment back into the aquatic environment.

Both TBT and TPhT will form mono/dibutyltin and mono/diphenyltin degradation products over time. As such, it will become more and more important to analyse all three forms of butyltins and all three forms of phenyltins as these will become more dominant.
As with PCBs, OTCs were very good at what they were designed to do. They were mainly used as antifouling agents on ship hulls and on bridges, as stabilisers in the manufacture of PVCs, as agriculture biocides, as wood preservatives and as insecticides/fungicides.

SGS is pleased to announce the analysis of Organotin Compounds in the following matrices:

  • Water: Monobutyltin, Dibutyltin, Tributyltin, Monophenyltin, Diphenyltin, Triphenyltin. Butyltins LOR 5ng Sn/L. Phenyltins LOR10ng Sn/L.
  • Solid: Monobutyltin, Dibutyltin, Tributyltin, Monophenyltin, Diphenyltin, Triphenyltin. Butyltins LOR 1µg Sn/kg. Phenyltins LOR 2µg Sn/kg.

For more information on Organotion compounds please contact your nearest SGS office.

Alex Rodriguez
Unit 16 / 33 Maddox Street
Alexandria NSW 2015
t: 02 8594 0400
f: 02 8594 0499

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The SGS Group is the global leader and innovator in inspection, verification, testing and certification services. Founded in 1878, SGS is recognised as the global benchmark in quality and integrity. With more than 53,000 employees, SGS operates a network of over 1,000 offices and laboratories around the world.