Table 4 shows the results for the content of AFM1 in the raw
milk. Contamination by AFM1 was detected in 45 of the 200 raw
milk samples, in the range from 5.2 to 59.6 ng/L. For the positive
raw milk samples, 38 samples contained AFM1 in the range of 5.1e
20.0 ng/L. Four samples contained AFM1 in the range of 20.1e
50.0 ng/L. Three samples, including one sample from Tianjin
province, one sample from Hebei province and one sample from
Guangdong province, contained AFM1 in the range of 50.1e60.0 ng/
L. The mean and the median of AFM1 in the positive samples were
15.3 ng/L and 10.1 ng/L, respectively. In the ten provinces, the
samples collected from Shandong province had the most serious
contamination of AFM1, with an incidence of 95%. AFM1 was not
detected in the samples collected from Heilongjiang province. The
percentage of positive samples in the raw milk from the north of
China was 21.9%, with the concentrations of 5.2e59.6 ng/L. The
figure was 25% in the raw milk from the south of China, and the
concentrations were 5.3e51.8 ng/L. There was no difference
observed between the north and the south in the contents of AFM1
(Table 4).