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Orthophosphate calculations

Guest Tazman
Guest Tazman
in Inorganic Chemistry

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Hey, just wondering if any of you could give me a hand with some calculations. I was just carrying out the Vanadomolybdate phosphoric acid method for orthophosphate in wastewater. I don't know how to convert mg/L PO4 3- to mg/L P or to mg/L PO4 3- -P. Just wondering if any of you have a quick calculation for converting this...

just use percent masses... phosphorus is ________% of PO4-3

thus, you multiply that percent, converted to a decimal by the amount of phosphate

Yeah, i got that as PO4, i don't know what to do with the 3- valence, is this not used...?

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