data = thermo.dat verify Na+ = 5 mg/kg K+ = 1 mg/kg Ca++ = 15 mg/kg Mg++ = 3 mg/kg Al+++ = 1 ug/kg SiO2(aq) = 3 mg/kg Cl- = 4 mg/kg SO4-- = 8 mg/kg HCO3- = 50 mg/kg pH = 5 react 400 mg of K-feldspar suppress Quartz suffix _Path