Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1996-08-30
1997-12-16
Brock, Michael
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
73 6154, G01N 3090
Patent
active
056987749
ABSTRACT:
A test apparatus for use in determining the concentration of oils or other soluble contaminants in a petroleum hydrocarbon solvent. The apparatus includes a positioner for a two-layer fibrous sheet, or two separate sheets, in either case providing an upper layer of material that is sorptive to polar materials and a lower layer that is absorptive to non-polar hydrocarbon liquids. When the contaminated liquid evaporates either, as by being heated, a characteristic stain indicative of contaminant level remains on the lower layer. The method includes applying contaminated solvent, separating particulates in the upper fibrous level, and allowing the soluble materials to stain the lower layer. Some embodiments of the apparatus include built-in heating and air circulation means.
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patent: 5313824 (1994-05-01), Herguth et al.
Brock Michael
Fitzgibbon James T.
Safety-Kleen Corp.
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