Method for determining glycol and formaldehyde contaminants in g

Details Method for determining glycol and formaldehyde contaminants in g Method for determining glycol and formaldehyde contaminants in g

1997-04-14

1998-09-01

Williams, Hezron E.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

73 6143, 422 681, 423264, C02B 114, G01N 2100, B65B 130

Patent

active

058013008

ABSTRACT:
A method for the qualitative determination of the visible levels of glycol and/or formaldehyde at significant concentrations greater than 10 ppm (10 ppm-10,000 ppm range) in a water sample, in which the sample is treated first with periodic acid, then with iodide-thiosulfate and finally with acetyl acetone to yield a yellow color without the benefit of heat. This yellow color is visible to the naked eye and proportional to the amount of contaminants ethylene glycol, propylene glycol and/or formaldehyde present in the original water sample.

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patent: 4466942 (1984-08-01), Rogers
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patent: 5295761 (1994-03-01), Heacock et al.
patent: 5576482 (1996-11-01), Russ et al.
patent: 5585550 (1996-12-01), Frank

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