Sulfate concentrations in pure solutions, drainage waters, and soil saturation extracts were determined potentiometrically using a 70% Pb and 30% Hg amalgam indicator electrode and a saturated calomel reference electrode. Adjusting all samples to pH 4.7 allowed titration to a fixed potential on an automatic titrator. Sulfate concentrations ranging from 0.2 to 10 mmole/liter were determined by this method and compared with concentration determined by a turbidimetric method. Results from the two methods did not differ significantly, but the potentiometric titration method was more precise, sensitive, and rapid.
No takes yet. Share an insight, caveat, or question.
Robbins et al. (1973) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: