Flow injection analysis of total inorganic phosphate

G - Physics – 01 – N

Patent

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G01N 21/27 (2006.01) G01N 21/77 (2006.01) G01N 21/78 (2006.01) G01N 33/00 (2006.01) G01N 35/08 (2006.01)

Patent

CA 2053489

A method for flow injection analysis of total inorganic phosphate contained in an aqueous system such a cooling tower or boiler is described which uses a reducing agent and preservative composition therefore as the carrier for he sample to be analyzed, thereby creating a facile process which permits conversion of the various polyphosphates to orthophosphate and development of the molybdenum blue complex color reaction at 60°-95°C and under 2-10 psi. This method has less stringent pressure and temperature requirements than those employed heretofore, thus permitting the use of more reliable and economic devices for measuring total inorganic phosphate in the field.

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