Letter 6096

Total, free and phenolphthalene Alkalinity 

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Total, free and phenolphthalene Alkalinity. The Hach manual (and I am sure others do as well) shows how to measure these. Does anyone have information on alkaline silicated aluminum cleaners and what the upper and lower limits for these alkalinities needs to be and why?

Mike McGinness
CPSSCO - S.Houston, Texas

Does anyone know the equation used to determine free and total alkalinity for determination of an unknown using a known standard? I know there is a general equation but I cannot remember what it is.

Richard Alexander Robles
- Monterey Park, California, United States

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