Table 4: Quality control data for coal fly ash 1633b (NIST) and IAEA-soil-7 reference material.

Elements Coal fly ash 1633bPDC valuesIAEA-soil-7PDC values
This work Certified valuesThis work Certified values

Dy (%)18.1017.00
Na (%)0.210.20 0.260.24
Mg (%)0.890.49 0.681.1339.82
Al (%)14.615.052.994.944.70
Ca (%)1.411.516.620.310.30
Ti (%)0.740.796.3316.1116.301.16
K (%)1.801.957.691.231.21
V (ppm)280.00295.605.2869.4066.00
Mn (ppm)128.70131.802.35647.00631.00