Skip to main content
. Author manuscript; available in PMC: 2008 Nov 24.
Published in final edited form as: J AOAC Int. 2008;91(3):511–523.

Table 2008.02A.

Interlaboratory study results for aflatoxins and ochratoxin A in powdered ginseng by liquid chromatography after immunoaffinity column cleanup

Mycotoxina Level, μg/kg Average, μg/kg Mean recovery, % sr, μg/kg sR, μg/kg RSDr, % RSDR, % HorRat 0.22c HorRatb No. labs used Outliers
AFB1 1 0.72 72 0.02 0.10 3.24 13.78 0.29 0.16 0.63 9 2
AFB2 0.25 0.21 85 0.02 0.03 10.51 13.76 0.24 0.05 0.63 11 0
AFG1 0.5 0.33 67 0.02 0.11 7.35 31.55 0.76 0.07 1.43 11 0
AFG2 0.25 0.19 78 0.01 0.02 5.40 12.49 0.22 0.04 0.57 10 1
AF 2 1.47 74 0.04 0.20 2.64 13.91 0.33 0.32 0.63 9 2
OTA 1 0.92 92 0.06 0.09 6.76 9.37 0.20 0.20 0.43 10 1
AFB1 2 1.37 68 0.14 0.31 9.97 22.51 0.52 0.30 1.02 11 0
AFB2 0.5 0.38 77 0.02 0.03 6.39 8.93 0.17 0.08 0.41 10 1
AFG1 1 0.67 67 0.07 0.19 10.10 28.87 0.60 0.15 1.31 11 0
AFG2 0.5 0.36 72 0.01 0.06 3.79 17.43 0.33 0.08 0.79 10 1
AF 4 2.80 70 0.23 0.59 8.31 21.22 0.55 0.61 0.96 11 0
OTA 2 1.82 91 0.05 0.12 2.50 6.49 0.16 0.40 0.30 11 0
AFB1 4 2.81 70 0.19 0.57 6.93 20.17 0.52 0.62 0.92 11 0
AFB2 1 0.78 78 0.05 0.11 5.93 14.14 0.30 0.17 0.64 11 0
AFG1 2 1.38 69 0.09 0.34 6.84 24.47 0.57 0.30 1.11 11 0
AFG2 1 0.73 73 0.04 0.11 5.42 14.98 0.32 0.16 0.68 11 0
AF 8 5.65 71 0.34 1.08 6.02 19.04 0.55 1.24 0.87 11 0
OTA 4 3.42 86 0.15 0.19 4.46 5.53 0.15 0.75 0.25 11 0
AFB1 8 5.54 69 0.21 1.09 3.84 19.76 0.57 1.22 0.90 10 1
AFB2 2 1.62 81 0.07 0.14 4.43 8.58 0.20 0.36 0.39 10 1
AFG1 4 2.74 69 0.18 0.69 6.71 25.34 0.65 0.60 1.15 10 1
AFG2 2 1.45 73 0.11 0.25 7.64 17.25 0.40 0.32 0.78 11 0
AF 16 11.27 71 0.49 2.29 4.31 20.29 0.65 2.48 0.92 10 1
OTA 8 6.99 87 0.25 0.63 3.56 8.99 0.27 1.54 0.41 11 0

Note: Blank samples were found to contain <0.1 μg/kg AF and OTA.

a

AF = Aflatoxin (sum of aflatoxins B1, B2, G1, and AFG2); OTA = ochratoxin A.

b

Calculated using predicted standard deviation of 0.22c.