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Quantification of K+ and Ca2+ in Creek Water Samples by Calibration-free K+ and Ca2+ ISEsa
| K+ (μM) | Ca2+ (μM) | |||
|---|---|---|---|---|
| ICP-OES (N = 3) | ISEs (N = 3) | colorimetric assays (N = 3) | ISEs (N = 6) | |
| creek water sample | 28.0 ± 0.71 | 28.1 ± 1.05 | 262 ± 1.5 | 257 ± 7.27 |
ICP-OES and colorimetric methods also validated the corresponding K+ and Ca2+ concentrations.
