What is the factor to convert from PO4 to PO4-P?

ID Artigo

ID Artigo TE6485

Data da Publicação

Data da Publicação 02/02/2022
What is the factor to convert from PO4 to PO4-P?
To convert from units of orthophosphate (PO43-) to orthophosphate as phosphorus (PO4-P), multiply the value by 0.3261. To convert from orthophosphate as phosphorus (PO4-P) to orthophosphate (PO43-) divide the value by 0.3261.

Many Hach spectophotometers and colorimeters give the option to change the chemical form of the reported value. This number is a ratio of the atomic mass of the elements in the chemical form. This calculation does not change the concentration of phosphorus in the sample, it only changes the value in relation to the units it is expressed in.

For example:
Changing a height from 6 feet to 72 inches, or to 183 cms, does not change the actual height, it only changes the units in which it is reported. They are all mathematically equivalent.

Please also see: What is the difference between reactive, acid hydrolyzable, and total phosphorus?

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