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Water soluble sulphate to BS1377

Water soluble sulphate to BS1377

Water soluble sulphate to BS1377

(OP)
I work for a soils laboratory in UK.  We analyse 2:1 water:soil sulphates to BS1377.  Usually this method is fine but occasionally I find after soaking and shaking certain samples it is difficult to extract 'clean' liquid.  I have tried filtration through a Buchner funnel, centrifuging and allowing sample to stand for a longer time but I have not found a successful method. Has anybody had a similar problem and got any solutions?

RE: Water soluble sulphate to BS1377

I made 4:1 extract then muliply final tesult by 2

RE: Water soluble sulphate to BS1377

That is not BS1377 though and would therefore be classed as a laboratory in-house developed method, which would need to be verified against another recognised standard before being accepted by most customers. In my experience, stick to the 1377 method.

LindsayS, I will get back to you regarding your problem, I don't often test sulphates but I know a man who can!!

RE: Water soluble sulphate to BS1377

I am in Canada and use a CSA method for testing water soluble sulphates.  I would be interested in taking a look at the BS1377 method that you are using to see how it compares.  Is there any way you can send me the BS1377 testing procedures?

RE: Water soluble sulphate to BS1377

Not without incurring the wrath of HM The Queen. You can purchase them on-line through www.BSIStandards.co.uk

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