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Table 4 The content of arsenic species in the dilute nitric acid solution (HNO3: H2O = 2: 98) extract

From: Bioaccessibility and risk assessment of heavy metals, and analysis of arsenic speciation in Cordyceps sinensis

Sample ID Total As (mg kg−1) Inorganic arsenic (mg kg−1)a Organic arsenic (µg kg−1) Unknown (mg kg−1)
As(III) As(V) Inorganic arsenic extraction efficiency (%) MMA DMA AsC AsB  
W1 9.00 ± 0.21 0.41 ± 0.04 0.26 ± 0.01 7.45 N/A ND ND ND 8.33
W2 9.93 ± 0.09 0.55 ± 0.02 0.35 ± 0.01 9.06 N/A ND ND ND 9.03
W3 10.18 ± 0.15 0.73 ± 0.02 0.25 ± 0.01 9.56 N/A ND ND ND 9.20
\( \overline{w} \) 9.70 ± 0.62 0.56 ± 0.16 0.29 ± 0.06 8.69 N/A ND ND ND 8.85
S1 1.38 ± 0.14 0.08 ± 0.01 0.50 ± 0.01 41.80 N/A ND ND ND 0.80
S2 1.41 ± 0.06 0.08 ± 0.00 0.39 ± 0.02 32.66 N/A ND ND ND 0.95
S3 1.68 ± 0.08 0.07 ± 0.01 0.40 ± 0.02 28.14 N/A ND ND ND 1.19
\( \overline{\text{S}} \) 1.49 ± 0.17 0.08 ± 0.01 0.43 ± 0.06 34.20 N/A ND ND ND 0.98
C1 14.23 ± 0.10 0.59 ± 0.04 0.30 ± 0.01 6.30 N/A ND ND ND 13.34
C2 13.62 ± 0.48 0.64 ± 0.07 0.28 ± 0.02 6.70 N/A ND ND ND 12.71
C3 12.57 ± 0.03 0.48 ± 0.02 0.32 ± 0.00 6.35 N/A ND ND ND 11.76
\( {\bar{\text{C}}} \) 13.47 ± 0.84 0.57 ± 0.08 0.30 ± 0.02 6.45 N/A ND ND ND 12.60
  1. Results are expressed as mean ± SD, (n = 3)
  2. N/A: trace amounts (LOD < N/A < LOQ); ND: not detected
  3. a The concentration calculated based on the original samples. \( \bar{\varvec{x}} \): the average value