Probably your question is related to water.Piper diagram is one of the oldest method for the classification of water and provide significance information. All major chemical constituents present in water are used in epm ( equivalent parts per million ), further into percentage, plotted in a standard procedure.. As piper diagram is a standard diagram and we have to follow its procedure, and induction of bicarbonate can not be ruled out.
If you are using Aquachem to make your plots and you don't have a value for bicarbonate Aquachem can calculate a value. You could also approximate a value using TDS.
Dear Mr. Henry
Thank you for your answer.
you mean by using this equation?
Bicarbonate=TDS-(Cation+Anions)
Piper diagram is a standard diagram, which has recommended procedure. This is made with the main cations and anions. TDS indicate sum of cations and anions. In Piper diagram, the considered chemical constituents are Na+K, Ca, and Mg included as cations and HCO3, Cl, and SO4 as anions. In additions to this there are various other cations and anions which also have some impact on TDS though they are in traces but can not be ignored. Thus if piper diagram is constructed with calculated HCO3 (approximate) may termed as some new diagram.
Dear Mr. Henry
I saw in the internet and in some references that the equation is :
TDS=(Sum of anions and cations + 0.5xBicarbonate) not 0.6xBicarbonate as you mentioned.
could you please check for me which one is more correct?
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