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On Thu, 6 Aug 2009 15:47:10 +0100, Sarah Roberts <[log in to unmask]> wrote: All, In investigating a site which has a potential to have been contaminated with elemental mercury during operation, it is necessary to consider the potential for it to still be present and hence whether there is a requirement to test for it. Available information suggests that elemental mercury will volatilise readily and any remaining will be transformed into much less volatile inorganic mercury salts. My enquiry is then two fold: 1 - Does anyone know of environmental laboratories who have the capability to test for Elemental Mercury with suitable accreditation? Thanks in anticipation Sarah Elementla Hg is no problem, any decent lab should be able to do it, the problem arises for inorganic, response from one of our favoured labs below: "Unfortunately we are unable to analyse for them [methyl and inorganic Hg] in-house, we can subcontract methyl mercury for £70 per sample however as yet we do not have a subcontractor for inorganic mercury as it is not regularly requested." Kind Regards A Laboratory