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Maybe this clarifies.
To convert from mg/l to ug/l which is converting ppm to ppb you can simply move the decimal over 3 places. For example- any reading that is .016 ppm or mg/l (milligrams pr litre) would translate to to 16.0 ppb or ug/l (micrograms pr litre)
To convert phosphorous to phosphate you would first take care of the conversion factor which is decimal place related. Then you would do the math conversion which is roughly a factor of three.
Take gdemos value of phosphorous for example which was determined by the ICP to be 5.26 ppb.
This converts to .00526 ppm after moving the decimal place to the left three spaces.
Then the conversion to phosphate gives a value of .016ppm which is almost three times the value of phosphorous.
To convert from mg/l to ug/l which is converting ppm to ppb you can simply move the decimal over 3 places. For example- any reading that is .016 ppm or mg/l (milligrams pr litre) would translate to to 16.0 ppb or ug/l (micrograms pr litre)
To convert phosphorous to phosphate you would first take care of the conversion factor which is decimal place related. Then you would do the math conversion which is roughly a factor of three.
Take gdemos value of phosphorous for example which was determined by the ICP to be 5.26 ppb.
This converts to .00526 ppm after moving the decimal place to the left three spaces.
Then the conversion to phosphate gives a value of .016ppm which is almost three times the value of phosphorous.