Table 2008.02B.

Interlaboratory study results for aflatoxins and ochratoxin A in powdered ginger 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	0.88	88	0.06	0.07	6.39	7.71	0.17	0.19	0.35	10	1
AFB2	0.25	0.22	90	0.02	0.02	7.55	7.94	0.14	0.05	0.36	10	1
AFG1	0.5	0.41	82	0.03	0.09	6.46	21.80	0.42	0.09	0.99	11	0
AFG2	0.25	0.22	86	0.01	0.03	4.79	12.30	0.22	0.05	0.56	10	1
AF	2	1.74	87	0.10	0.24	5.70	13.76	0.33	0.38	0.63	11	0
OTA	1	0.93	93	0.08	0.10	8.14	10.72	0.23	0.20	0.49	10	1
AFB1	2	1.65	83	0.07	0.10	4.51	5.79	0.14	0.36	0.26	9	2
AFB2	0.5	0.45	89	0.03	0.04	7.05	8.60	0.17	0.10	0.39	11	0
AFG1	1	0.69	69	0.05	0.14	7.97	20.99	0.44	0.15	0.95	11	0
AFG2	0.5	0.40	79	0.03	0.05	8.07	13.17	0.25	0.09	0.60	11	0
AF	4	3.11	78	0.16	0.47	5.10	15.07	0.40	0.69	0.68	11	0
OTA	2	1.86	93	0.08	0.16	4.31	8.56	0.21	0.41	0.39	11	0
AFB1	NCc	8.44	NAd	0.65	0.68	7.69	8.06	0.25	1.86	0.37	9	2
AFB2	NC	0.83	NA	0.07	0.13	7.79	15.89	0.34	0.18	0.72	10	1
AFG1	NC	6.33	NA	0.76	2.82	11.96	44.56	1.30	1.39	2.03	11	0
AFG2	NC	1.03	NA	0.13	0.31	12.88	30.58	0.68	0.23	1.39	11	0
AF	NC	16.22	NA	1.46	4.64	9.00	28.60	0.96	3.57	1.30	11	0
OTA	NC	7.27	NA	0.39	0.52	5.36	7.20	0.21	1.60	0.33	10	1
AFB1	8	6.47	81	0.19	0.46	2.96	7.10	0.21	1.42	0.32	11	0
AFB2	2	1.74	87	0.05	0.10	3.00	5.81	0.14	0.38	0.26	11	0
AFG1	4	2.60	65	0.09	0.68	3.34	26.00	0.66	0.57	1.18	11	0
AFG2	2	1.52	76	0.05	0.23	3.61	15.19	0.36	0.33	0.69	11	0
AF	16	12.85	80	0.29	0.74	2.22	5.74	0.19	2.83	0.26	9	2
OTA	8	9.02	113	0.46	0.93	5.15	10.31	0.32	1.99	0.47	10	1

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

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

^bCalculated using predicted SD of 0.22c.

^cNC = Naturally contaminated.

^dNA = Not applied.