Skip to main content

Advertisement

Table 8 Descriptive statistics of elements contents (weight%) in KACST201 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 0.0047 0.0007 15.57 13.37 0.25 − 2.00
As 0.0099 0.0045 45.62 37.74 0.92 − 0.56
Br 0.0159 0.0003 1.78 1.39 − 0.57 − 0.55
Ca 0.6066 0.0300 4.95 3.75 0.17 − 0.43
Cl 1.2443 0.0079 0.63 0.49 1.76 2.36
Fe 0.0233 0.0010 4.26 3.41 − 0.39 − 1.17
K 6.1057 0.0237 0.39 0.31 0.30 − 1.46
Mg 0.1866 0.0010 0.52 0.42 − 0.28 0.04
Na 0.3049 0.0034 1.11 0.98 0.17 − 2.41
P 1.3471 0.0111 0.83 0.67 − 0.25 − 0.94
S 1.9457 0.0223 1.14 0.99 − 0.13 − 2.22
Si 0.0355 0.0012 3.33 2.67 0.20 − 1.11
Sr 0.0067 0.0004 5.61 4.60 − 0.76 − 1.29
Zn 0.0161 0.0005 3.06 2.34 − 0.23 − 0.57
  1. SD standard deviation, RSD relative standard deviation, RAD relative average deviation