Skip to main content

Advertisement

Table 3 Descriptive statistics of elements contents (weight%) in KACST402 CRM

From: Between-bottle homogeneity test of new certified reference materials employing wavelength dispersive X-ray fluorescence spectrometry

Element Average SD RSD% RAD% Skewness Kurtosis
Al 6.153 0.0450 0.73 0.61 − 0.20 − 1.86
Ba 0.051 0.0019 3.70 2.78 0.82 0.28
Ca 4.047 0.0382 0.94 0.77 0.84 − 1.29
Cl 0.592 0.0085 1.44 1.20 − 0.26 − 1.57
Cr 0.018 0.0011 6.22 5.55 0.36 − 2.32
Cu 0.009 0.0007 8.09 6.39 0.40 − 0.80
Fe 5.406 0.0223 0.41 0.33 0.63 − 1.04
K 1.424 0.0960 6.74 4.31 2.50 6.41
Mg 1.860 0.0100 0.54 0.46 0.00 − 2.60
Mn 0.088 0.0016 1.84 1.46 0.77 − 1.26
Na 1.160 0.0082 0.70 0.49 0.00 − 1.20
Ni 0.013 0.0001 0.73 0.58 − 0.28 0.04
P 0.079 0.0144 18.3 12.2 − 2.11 4.69
Pb 0.012 0.0009 7.47 4.78 2.22 5.27
Rb 0.004 0.0002 4.78 3.90 − 0.29 − 1.45
S 0.328 0.0050 1.53 1.21 0.70 − 0.06
Si 19.61 0.1574 0.80 0.67 0.04 − 1.68
Sr 0.041 0.0002 0.57 0.40 1.84 3.68
Ti 0.473 0.0088 1.86 1.42 0.93 − 0.11
Zn 0.344 0.0031 0.90 0.81 0.28 − 2.47
Zr 0.027 0.0001 0.50 0.38 − 0.35 − 0.30
  1. SD standard deviation, RSD relative standard deviation, RAD relative average deviation