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When is the Silica Gel Treatment (SGT) necessary?

April 26, 2017gel necessary Sgt silica treatment

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When is the Silica Gel Treatment (SGT) necessary?

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Silica Get Treatment (SGT) is for total petroleum hydrocarbon (TPH) measurements only. Total oil and grease (TOG) measurements should not get the SGT as the silica gel removes the polar organics which should be part of the TOG measurement. If a sample contains the polar organics and the customer only wants to measure TPH, it is required. If a TPH only sample has an emulsion after extraction, SGT may help break the emulsion.