During a separate inquiry, I encountered the examination of sulfate ion concentrations. Although Spectrophotometric sulfate measurement is suitable for low concentrations between 1 mg/L and 40 mg/L, Ion-Selective Electrodes (ISEs) are highly successful in identifying sulfate ion concentrations at larger concentrations ranging from 20 g/L to 50 g/L. I would appreciate it if you could propose further techniques for this investigation. Could you kindly furnish links to videos, books, or study materials pertaining to these methodologies, if available?