Calcium, sodium, and magnesium were determined with a Thermo Electron, M-Series atomic absorption spectrometer. Phosphate was analyzed with a Varian Cary 300 UV–Vis spectrophotometer as phosphate–molybdenum blue complex.
Calcium, sodium, and magnesium were determined with a ThermoElectron, M-Series atomic absorption spectrometer. Phosphate wasanalyzed with a Varian Cary 300 UV–Vis spectrophotometer asphosphate–molybdenum blue complex.