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Table 7 Concentration of heavy metals, sulfur dioxide and pesticides in herbal decoctions

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

Clarification (Sample N.) Average ± SD (Range value, ug/kg, but mg/kg for sulfites)
As Cd Pb Hg Pesticides Sulfites
Nutritional disorders (41) 82.9 ± 97.6 (1.3–582.4) 17.8 ± 12.6 (2.9–41.2) 66.5 ± 100.4 (0.0–631.7) NDa ND 17.6 (1 sample)
Respiratory disorders (36) 78.5 ± 84.7 (0.0–374.4) 25.4 ± 39.5 (0.0–219.0) 75.8 ± 71.6 (0.0–242.8) ND ND ND
Digestive disorders (22) 67.3 ± 67.2 (0–106.9) 14.9 ± 11.9 (0–22.1) 67.1 ± 55.8 (0–121.6) ND ND ND
Genitourinary disorders (12) 82.6 ± 85.3 (13.5–245.9) 18.2 ± 22.9 (1.7–86.2) 65.7 ± 78.1 (0.5–25.3) ND ND ND
Muscular disorders (12) 118.6 ± 59.6 (7.4–229.4) 36.3 ± 21.4 (3.2–93.9) 107.2 ± 51.0 (21.0–04.7) ND ND ND
Gynecological disorders (10) 117.1 ± 74.4 (0.0–237.1) 27.6 ± 14.3 (0.0–45.9) 118.7 ± 95.7 (0–308.4) ND ND ND
Psychiatric disorders (10) 30.2 ± 25.7 (0.0–91.5) 11.7 ± 13.1 (0.0–39.9) 21.2 ± 35.2 (0.0–119.2) ND ND ND
Circulatory disorders (6) 50.9 ± 34.4 (14.6–112.6) 16.6 ± 16.7 (2.9–46.8) 43.5 ± 28.3 (0.0–79.8) ND ND ND
Skin disorders (6) 58.9 ± 42.5 (4.0–129.7) 20.0 ± 12.8 (0.4–38.1) 52.8 ± 27.2 (9.7–81.7) ND ND 17.6 (1 sample)
Total (155) 96.1%b 97.4% 90.3% 0% 0% 0.7%
77.0 ± 79.7 20.4 ± 23.7 68.8 ± 76.5 - - -
(0.0–582.4) (0.0–219.0) 54 (0.0–631.7) - - -
95th percentile 304.4 ± 121.1 90.1 ± 56.2 285.8 ± 144.1    
  1. aND: Not detected in any sample over detectable level; bDetection rate for each heavy metal