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- Posts: 11
- Joined: Wed Aug 25, 2021 3:05 pm
I am looking for recommendations on what concentrations my anion calibration standards should be. I purchase premade stock solutions from AccuStandard. I noticed that many premade multielement standards have different concentrations for each species - is there a reason for this, or does it solely depend on the method/what you're looking for? I did find one standard that contains 100 ppm across the board of all species of interest, so I was planning on using this.
For my purposes, I want to be able to analyze F, Cl, Br, NO3, PO4, SO4 at concentrations of 0.1-20 ppm. I need to use linear curves, preferably unweighted to make uncertainty calculations simpler. How many calibration points should I use, and at what concentrations?
Just looking for some opinions to make sure my thinking is reasonable. All suggestions and advice are appreciated!