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Han R.W.,Chinese Academy of Agricultural Sciences | Han R.W.,Ministry of Agriculture Milk and Dairy Product Inspection Center Beijing | Han R.W.,Laboratory of Quality and Safety Risk Assessment for Dairy Products Beijing | Han R.W.,Qingdao Agricultural University | And 15 more authors.
Food Control | Year: 2013

In August 2010, 200 feed samples for dairy cow and 200 milk samples were collected from ten major milk-producing provinces in China. The feed samples were analysed for Aflatoxin (AF) B1, B2, G1 and G2, using the HPLC method. AFM1 in the milk samples was determined using the ELISA method. AFB1 and AFB2, but not AFG1 and AFG2 were detected in the feed samples. In the feeds, 42% of the samples contained AFB1 in the range of 0.05-3.53μg/kg, and 36% of the samples were detected positive for AFB2, with the content ranging from 0.03μg/kg to 0.84μg/kg. The content of AFB1 was significantly (P<0.05) higher than that of AFB2 in the feeds, but it was still below the legal limits of 5μg/kg (in EU) and 10μg/kg (in China), respectively. The total content of AFs was below the U.S. legal limit of 20μg/kg. For the milk samples, 32.5% were detected positive for AFM1, in the range of 5.2-59.6ng/L, far below the legal limit of 500ng/L in China and the US. However, three samples contained AFM1 at the levels of exceeding 50ng/L of the EU legal limit. Furthermore, there was no significant (P>0.05) difference between the north and the south of China in the AF contents in both the dairy cow feed samples and the milk samples. © 2013 Elsevier Ltd.


Zheng N.,Chinese Academy of Agricultural Sciences | Zheng N.,Milk and Dairy Product Inspection Center Beijing | Zheng N.,Laboratory of Quality and Safety Risk Assessment for Dairy Products Beijing | Wang J.-Q.,Chinese Academy of Agricultural Sciences | And 11 more authors.
Food Additives and Contaminants: Part B Surveillance | Year: 2013

Aflatoxin M1 (AFM1) is the only mycotoxin that has a legal limit in milk all over the world. In the present study, 360 raw milk samples were collected from Beijing, Hebei, Shanxi, Shanghai and Guangdong provinces in China in September 2010, and their AFM1 levels were determined by using enzyme-linked immunosorbent assay (ELISA). More than three-fourths (78.1%) of the 360 raw milk samples contained AFM1 at concentrations of 5-123 ng L-1. AFM1 contents in all positive samples were far below the Chinese and US legal limit of 500 ng L-1, but 10% of the raw milk samples exceeded the EU legal limit of 50 ng L-1. Moreover, both incidence and content of AFM1 in milk collected from the southern provinces, including Shanghai and Guangdong, were higher than those collected from the northern provinces, including Beijing, Hebei and Shanxi. © 2013 Copyright Taylor and Francis Group, LLC.


Guo L.Y.,Gansu Agricultural University | Guo L.Y.,Laboratory of Quality and Safety Risk Assessment for Dairy Products Beijing | Guo L.Y.,Milk and Dairy Product Inspection Center Beijing | Guo L.Y.,Chinese Academy of Agricultural Sciences | And 11 more authors.
Food Control | Year: 2016

Total 530 samples of raw milk were collected from the dairy farms in the Tangshan region of north China during four seasons each year from 2012 to 2014, and aflatoxin M1 (AFM1) contents were measured using HPLC-MS/MS. The results showed that AFM1 was detected in 280 samples (52.8%) at the range of 10-200 ng L-1, and the mean level of AFM1 was 73.0 ng L-1, which was below the China and US legal limit of 500 ng L-1. The incidences of AFM1 contamination were 27.5% in spring, 39.0% in summer, 71.7% in autumn and 78.9% in winter, respectively. It indicated that seasonal variations should be considered for the AFM1 control particularly during winter season. In comparison with the data from different years, the incidences of AFM1 contamination in raw milk samples were 87.8% with a range of 10.0-160 ng L-1 in 2012, 29.9% with 10.0-190.0 ng L-1 in 2013 and 36.7% with 12.0-111.0 ng L-1 in 2014. Hence, present study exhibits a significant decrease in the incidence of AFM1 contamination in Tangshan region after 2012. © 2016 Elsevier Ltd.

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