Effect of temp. on phosphate readings
Effect of temp. on phosphate readings
(OP)
Being Mechanical and not so chemical, I am not sure of this: What effect does sample temperature have on our boiler water phosphate sample tests? Our local operators say temperature does have a bearing on the result. And how about a silica test? I am designing a cooling system for the water samples in our plant.





RE: Effect of temp. on phosphate readings
The majority of the errors involved in sampling and measurement occur in the sampling lines. For example, a high temperature sample saturated with dissolved metal or metal oxide may become supersaturated as it is cooled and the contaminant may plate out on the sampling system surfaces.
It is important to keep the sample flow rate and temperature constant. A change may result in a crud burst that can raise the contaminant concentration by an order of magnitude. Silica monitoring will also require that the samples be continously flowing.
RE: Effect of temp. on phosphate readings