G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 31/22 (2006.01) G01N 21/78 (2006.01)
Patent
CA 2160233
A test method and device is described for determining biguanides in aqueous fluids such as swimming pool water which involve contacting the fluid with a matrix incorporating a pH sensitive indicator material which exhibits the biguanide error effect A buffer is advantageously used to maintain the test system within a defined constant pH range to eliminate the effect of pH changes on the test system.
Blake Kenneth Allen
Rupe Chauncey Orvis
Terry Carol Ann
Environmental Test Systems Inc.
Hach Company
Osler Hoskin & Harcourt Llp
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