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Table 5 Percent recovery of reference material by XRF (Expected Value)

From: Evaluation of heavy metals content in dietary supplements in Lebanon

  Cu (μg/g) Fe (μg/g) Mn (μg/g) Se (μg/) Ti (μ/g) Zn (μg/g)
Tomato leave Certified (NIST 1573a) 4.7 ± 0.14 368 ± 7 246 ± 8 14.89 ± 0.27 - 30.9 ± 0.7
Measurement 4.42 ± 0.18 371 ± 9 242 ± 10 13.12 ± 0.31 - 31.2 ± 0.8
% Recovery 94 101 98 88 - 101
Soil Certified (NIST 2586) - 51610 ± 890 1000 ± 18 - 6050 ± 660 352 ± 16
Measurement - 48513 ± 700 903 ± 27 - 5627 ± 500 335 ± 20
% Recovery - 94 90 - 93 95