Chemistry: analytical and immunological testing – Nitrogen containing – Nitrite or nitrate
Patent
1989-08-18
1991-10-29
Lacey, David L.
Chemistry: analytical and immunological testing
Nitrogen containing
Nitrite or nitrate
436 52, 436114, 436115, 436128, 436161, 2101982, 210635, 210656, G01N 3000
Patent
active
050616382
ABSTRACT:
A system and method for determining the concentration of nitrate ions in a nitrate ion-containing water sample which also contains chloride ions and bicarbonate ions is disclosed. The potentially interfacing chloride ions are suppressed by reaction with a cation exchange resin in the silver form. The potentially interferring bicarbonate ions are suppressed by reaction with a cation exchange resin in the hydrogen form. The sample, after having been treated with the two resins is passed into a conductivity cell with the conductivity being directly related to the nitrate ion concentration of the sample. The device and method find advantageous application in automated systems for monitoring and controlling water treatment facilities.
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CA 105(6): 53690t, "Applications of Ion-Exchange Minicolumns in a Flow-Injector System for the Spectrophotometric Determination of Anions".
Boyle Engineering Corporation
Lacey David L.
Redding David
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