Extraction reagent and conditions Concentration (wt%) Concentration (wt%) Concentration (wt%) Concentration (wt%) Concentration (wt%) Concentration (wt%) Concentration (wt%) Concentration (wt%) Concentration (wt%) Concentration (wt%)
Al Fe Si Ti Zr Ca K P Mg O
NIST SRM 600 33.80 13.52 6.20 0.87 0.32 0.24 0.22 0.22 0.14 44.28
0.50 M KHO – 15 g/L 9.70 1.06 34.05 2.81 0.34 0.60 0.82 0.24 0.02 50.54
0.75 M KHO – 15 g/L 8.00 0.94 35.61 2.56 0.29 0.68 0.73 0.24 0.02 50.70
0.25 M KTO – 15 g/L 9.16 1.09 34.51 3.17 0.32 0.08 0.82 0.28 0.03 50.69
0.25 M KTO – 20 g/L 9.45 2.05 33.39 3.23 0.36 0.08 0.74 0.26 0.02 50.21