Hach POCKET COLORIMETER II, Instruction Manual

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Digestion for Total Phosphorus
(Also called Organic and Acid Hydrolyzable)
Method 8190
For water, wastewater, and seawater.
Acid Persulfate Digestion Method*
USEPA accepted for reporting
wastewater analysis**
Measuring Hints
•
If the expected total phosphate concentration is greater than 3 mg/L, dilute the
sample and apply the appropriate dilution factor to the results.
* Adapted from Standard Methods for the Examination of Water and Wastewater.
** Procedure is equivalent to USEPA Method 365.2 and Standard Method 4500-P B,
5 and PE.