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BSI BS 6337-1: English -- General Methods of Chemical Analysis Part 1: Method for Determination of Traces of Sulphur Compounds by Reduction and Titrimetry
Abstract: Applicable to amounts of sulphate between 4.5 and 450 μg either in solution or in the test portion. The sulphate can be present as such or can be produced by suitable pre-treatment.
BSI BS 6376-1: English -- Reagents for Chemical Analysis Part 1: Methods of Test
Abstract: Test methods for verifying compliance of reagents for chemical analysis with specifications to be published in further parts of this standard.