Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Calorimeter
Patent
1991-05-30
1992-04-21
Johnston, Jill A.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Calorimeter
422 58, 436 83, 436 84, 436169, G01N 3122, G01N 3320/21/77
Patent
active
051065819
ABSTRACT:
Improved method and device for detection and semi-quantitative colorimetric determination of molybdate, ferric, and vanadate ions in aqueous solutions and coolant systems containing ethylene glycol and coolant additive. The disclosed device comprises of test strips of absorbent support carrier or water resistant film impregnated uniformly with a hydroxylamine salt and a polyhydroxy organic acid such as gallic acid or its derivatives. Molybdate ions result in an orange/brown colorataion, ferric and vanadate ions result in a grey-blue/black coloration with color intensity directly proportional to concentration of ions.
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Buchwald et al., "The Colorimetric Determination of Molybdenium with Polyhydric Phenols" Talanta, 1962, 9, 631-637.
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Jaunakais Ivars
Jaunakais James K.
Industrial Test Systems, Inc.
Johnston Jill A.
Soderquist Arlen
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