Digestion For Total Phosphorus; Measuring Hints - Hach POCKET COLORIMETER II Instruction Manual

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Digestion for Total Phosphorus

(Also called Organic and Acid Hydrolyzable)

For water, wastewater, and seawater.

Acid Persulfate Digestion Method*

wastewater analysis**

•

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.

USEPA accepted for reporting

1—31

Method 8190

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