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 Measuring time: 100 seconds

 Unit: ppm

 Arsenic (As) condition: Rb_Re‐Tl

 Secondary target: ZrFigure 6.3 Calibration curve for measurement of arsenic (As).Table 6.1 Analytical results of Orchard Leaf (NIST1571) obtained from Compact EDXRF system as the purpose to fulfill the requirement of method validation.ElementsElemental concentration (mg/kg)MeanSDCertified valueRE (%)CV (%)Exp‐1Exp‐2K14 90013 98714 44464614 7001.744.47Ca19 98119 62819 80525020 9005.241.26Mn90.8992.7291.811.2991−0.881.41Fe302311306.506.36300−2.172.08Cu12.2213.0112.620.5612−5.134.43Zn25.1925.5725.380.2725−1.521.06As9.489.659.570.12104.351.26Rb11.3711.4111.390.03125.080.25Sr39.2139.8839.550.4737−6.881.20Pb44.7145.0344.870.23450.290.50