Warwick Analytical Service (WAS) offers a routine service for the micro-determination of sulphur in organic and inorganic compounds with analytical uncertainty of less than +/-0.3 per cent absolute.
The sulphur method is covered by the company's ISO 17025 and UKAS accreditation.
The analysis of sulphur at WAS is carried out by combustion of an accurately weighed sample in a silica oxygen flask over an accurately measured volume of aqueous peroxide solution.
Combustion of the sample in oxygen yields water-soluble inorganic compounds.
The percentage of sulphur is determined by titration with Barium Perchlorate using Thorin screened with Methylene Blue as an indicator.
Sets of work typically include certified reference materials or organic analytical standards to monitor detection trends in the method.
Requiring just a few milligrams of sample, the WAS method has been fully validated and is linear from 0.006mg to 1mg sulphur.
WAS, an ISO 17025-, UKAS- and GMP-accredited company, has also developed special procedures to remove interferences from samples containing fluorine, chromium, arsenic and metals.
The accurate micro-determination of sulphur in organic and inorganic compounds is of interest to a range of industries, including chemicals, petrochemicals, pharmaceuticals, biotechnology, environmental monitoring and geochemistry.
