Table 1. Contamination levels of fumonisins (µg/kg) and the positive rate of detection in the 6th China TDS, 2015−2020.

Food category	FB1	FB2	FB3	FBs
Note: for samples in which toxins were not detected, values were assumed to be half the LOD and for samples in which toxin levels were below the LOQ, values were assumed to be half the LOQ. There are 24 samples for each food category. Abbreviations: FB1=fumonisin B1; FB2=fumonisin B2; FB1=fumonisin B1; TDS=total diet study; LOD=limit of detection; LOQ=limit of quantification.
Cereals
Positive, %	95.8	25.0	20.8	95.8
Mean	5.33	0.58	1.68	7.59
Median	2.57	0.02	0.02	2.74
Legumes
Positive, %	58.3	0.0	12.5	58.3
Mean	0.78	0.01	0.10	0.90
Median	0.16	0.01	0.01	0.23
Potatoes
Positive, %	66.7	4.2	16.7	66.7
Mean	0.57	0.02	0.13	0.72
Median	0.09	0.01	0.01	0.14
Meats
Positive, %	62.5	4.2	4.2	62.5
Mean	1.08	0.02	0.03	1.13
Median	0.25	0.01	0.01	0.27
Eggs
Positive, %	16.7	8.3	0.0	16.7
Mean	0.02	0.06	0.01	0.09
Median	0.01	0.01	0.01	0.03
Aquatic products
Positive, %	8.3	20.8	0.0	25.0
Mean	0.03	0.75	0.01	0.79
Median	0.01	0.01	0.01	0.03
Dairy products
Positive, %	4.2	0.0	0.0	4.2
Mean	0.02	0.01	0.01	0.04
Median	0.01	0.01	0.01	0.03
Vegetables
Positive, %	20.8	0.0	0.0	20.8
Mean	0.17	0.01	0.01	0.19
Median	0.01	0.01	0.01	0.03
Fruits
Positive, %	0.0	0.0	0.0	0.0
Mean	0.01	0.01	0.01	0.03
Median	0.01	0.01	0.01	0.03
Sugars
Positive, %	0.0	0.0	0.0	0.0
Mean	0.01	0.01	0.01	0.03
Median	0.01	0.01	0.01	0.03
Beverages and water
Positive, %	0.0	4.2	0.0	4.2
Mean	0.01	0.01	0.01	0.03
Median	0.01	0.01	0.010	0.03
Alcohols
Positive, %	33.3	4.2	4.2	33.3
Mean	0.52	0.16	0.50	1.17
Median	0.01	0.01	0.01	0.03
Total samples (N=288)
Positive, %	30.6	5.9	4.9	32.6