title: [Survey of aflatoxins contamination of foodstuffs and edible oil in Shenzhen].
abstract: OBJECTIVE
  To identify the aflatoxins contamination of foodstuffs and edible oil sold in Shenzhen.
  
  
  METHODS
  As research subjects stratified random sampling of 238 foodstuffs and edible oil, and applied with immuno-affinity column clean-up plus UPLC to determine the content of aflatoxin B1, B2, G1, and G2.
  
  
  RESULTS
  Positive ratio of aflatoxin in rice, rice products, wheat flour, corn flour, edible oil were 35.3%, 33.8%, 13.9%, 46.7% and 24.5%,respectively. There were statistical differences between the positive ratio of aflatoxin in stereotypes packaged rice (26.5%) and bulk rice (56.3%) (chi2 = 11.6, P < 0.05). There were statistical differences between the positive ratio of aflatoxin in the rice produced in the area north of the Yangtze River (27.3%) and in the rice (41.4%) produced in the area south of the Yangtze River (chi2 = 7.257, P < 0.05). Aflatoxin B1 and B2 were detected in rice products, wheat flour, corn flour. Positive ratio of aflatoxin B1, B2, G1, and G2 were 24.5%, 24.5%, 11.3% and 3.8% in the edible oil,respectively. The over standard rate of aflatoxin B1 was 5.66%, excessive samples were producted bulk and self-pressed peanut oil from unlicensed workshop.
  
  
  CONCLUSIONS
  All the four kinds of aflatoxin were detected, while subtype B1 and B2 dominated aflatoxin contamination in the rice and edible oil samples. There are differences between in the northern and southern rice, and the same as in the stereotypes packaged and bulk rice sold at Shenzhen.
authors.affiliation: Disease Control and Prevention of Futian in Shenzhen, Shenzhen 518040, China. like06@163.com
authors.forename: Ke
authors.initials: K
authors.lastname: Li
authors.forename: Fen
authors.initials: F
authors.lastname: Qiu
authors.forename: Mei
authors.initials: M
authors.lastname: Yang
authors.forename: Zhaohai
authors.initials: Z
authors.lastname: Liang
authors.forename: Haitao
authors.initials: H
authors.lastname: Zhou
mesh_terms: D016604:Aflatoxin B1 / Q000032:analysis; D000348:Aflatoxins / Q000032:analysis*; D002681:China; D002947:Cities; D005504:Food Analysis / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D012275:Oryza / Q000737:chemistry / Q000382:microbiology; D010938:Plant Oils / Q000032:analysis*
chemical_list: D000348:Aflatoxins; D010938:Plant Oils; C029753:aflatoxin B2; D016604:Aflatoxin B1