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Table 3 LOD, LOQ, precision and recovery for 4 heavy metals analyzed

From: Monitoring heavy metals, residual agricultural chemicals and sulfites in traditional herbal decoctions

Element

Reference Value

Found

Recovery

(%)

Precision

(CV%)

LOD

LOQ

Mean ± SD (mg/kg)

AS

0.285 ± 0.014a

0.298 ± 0.007

104.7

2.5

0.004 μg/kg

0.014 μg/kg

Cd

1.52 ± 0.04b

1.462 ± 0.005

96.2

0.3

0.003 μg/kg

0.009 μg/kg

Pb

0.87 ± 0.03c

0.703 ± 0.021

80.9

2.9

0.079 μg/kg

0.264 μg/kg

Hg

0.034 ± 0.004b

0.031 ± 0.003

100.0

4.7

0.017 mg/kg

0.057 mg/kg

  1. aRice flour Certified Reference Material (NIST 1568b), bTomato leaves Certified Reference Material (NIST 1573a), cPeach leaves Certified Reference Material (NIST 1547), LOD: limits of detection, LOQ: limits of quantification