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6. Noosa River DMP Ver0 (Combined)
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Page : 25 of 25
Work Order : EB2201825
Client : BMT COMMERCIAL AUSTRALIA PTY LTD
Project : A10342 - Noosa SAP
Preparation Methods Method Matrix Method Descriptions
Organotin Sample Preparation ORG35 SOIL In house: 20g sample is spiked with surrogate and leached in a methanol:acetic acid:UHP water mix and
vacuum filtered. Reagents and solvents are added to the sample and the mixture tumbled. The butyltin
compounds are simultaneously derivatised and extracted. The extract is further extracted with petroleum ether.
The resultant extracts are combined and concentrated for analysis.
QuECheRS Extraction of Solids ORG71 SOIL In house: Sequential extractions with Acetonitrile/Methanol by shaking. Extraction efficiency aided by the addition
of salts under acidic conditions. Where relevant, interferences from co-extracted organics are removed with
dispersive clean-up media (dSPE). The extract is either diluted or concentrated and exchanged into the
analytical solvent.
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