Table 5.

Mean occurrence data for OTA in various food commodities in Canada.

				Not corrected for recovery		Corrected for recoverya
Commodity assessed	EC ML	Number of samples	Number of positives	1/2 LODb, mean (ng OTA g-1)	Imputed, mean (ng OTA g−1)	Number > ML	No ML (ng OTA g−1)	With ML (ng OTA g−1)c
Health Canada (HC)
Rice	3	17	4	0.90	0.78	0	0.80	0.68
Corn based breakfast cereal	3	34	6	0.04	0.04	0	0.04	0.04
Multigrain based breakfast cereal	3	83	46	0.25	0.25	0	0.27	0.27
Oat based breakfast cereal	3	61	33	0.39	0.38	1	0.43	0.40
Rice based breakfast cereal	3	29	3	0.04	0.03	0	0.03	0.03
Wheat-based breakfast cereal	3	132	54	0.30	0.28	4	0.31	0.30
Infant cereal	0.5	296	101	0.24	0.23	26	0.25	0.17
Soy-based infant formulad	0.5	108	16	0.04	0.03	0	0.04	0.04
Pasta	3	274	205	0.47	0.48	1	0.53	0.52
Beer	–	41	26	0.05	0.05	–	0.05	–
Wine	2	180	63	0.10	0.10	3	0.11	0.09
Grape juice	2	71	9	0.01	0.01	0	0.01	0.01
Raisins	10	151	118	1.83	1.83	9	2.27	1.68
Coffee – ground regular	5	59	38	0.42	0.42	0	0.53	0.53
Coffee – ground decaffeinated	5	12	4	0.22	0.21	0	0.26	0.26
Coffee – instant regular	10	21	15	0.81	0.81	0	1.07	1.07
Coffee – instant decaffeinated	10	9	5	0.52	0.51	0	0.68	0.68
Pork	–	90	19	0.42	0.32	–	0.35	–
Canadian Grain Commission (CGC)
Hard wheat	5	521	92	0.97	0.78	15	0.88	0.70
Soft wheat	5	7(1	6	0.67	0.40	1	0.45	0.38
Durum wheat	5	235	60	1.18	1.05	13	1.19	0.98
Oats	3	54	18	2.41e	2.24e	8	2.54e	0.92
Barley	3	136	13	0.75	0.46	7	0.52	0.41
Peas	3	49	12	1.35	1.17	6	1.33	0.84

Notes: ^aCorrection for recovery was based on the imputed data.

^bValues below the limit of detection (LOD) were set to 1/2 LOD.

^cAll values above the European maximum limits (MLs) were set to the ML.

^dDue to the lack of positives and higher detection limit in 1997, imputing was not possible for 40 of the samples, Thus samples were not included in the analysis.

^eThe high mean values for oats are due to a single sample that was over ten times higher than the other occurrence values.