title: [Comparison of organic component and di-n-butyl phthalate between human milk and cow milk products].
abstract: OBJECTIVE
  To explore types of organic components and pollution level of di-n-butyl phthalate (DBP) between human milk and cow milk products.
  
  
  METHODS
  Forty healthy postpartum women with an average age of (27.44 ± 3.43) years old were selected, and a 5 ml sample of breast milk were collected. Four different brands of fresh cow milk and 1 brand of milk powder were randomly selected in the market. A total of 15 samples were collected with 3 from each brand, and the qualitative analysis of types of organic components and quantitative analysis of DBP were conducted by gas-chromatography and mass-spectrometry (GC/MS) method.
  
  
  RESULTS
  A total of 176 different types of organic components were detected in 40 samples of human milk (averaged at (10.58 ± 4.16) types per sample); 37 different types were detected in 12 samples of fresh cow milk (averaged at (8.67 ± 1.61) types per sample); while 31 types of organic components were detected in 3 samples of milk powder (averaged at (12.67 ± 0.58) types per sample). It was obvious that the types of organic components in milk powder were significantly higher than the other two groups (t = 2.09, 4.00, P < 0.05). The most frequent organic component in human milk and cow milk was 9-octadecenoic acid (45.00% (18/40) in human milk; 53.33% (8/15) in cow milk). DBP concentrations were (57.78 ± 35.42) µg/L, (20.76 ± 6.60) µg/L and (0.45 ± 0.05) mg/kg (equal to (66.78 ± 7.60) µg/L) in human milk, fresh cow milk and milk powder, respectively. The DBP concentration in fresh cow milk was significantly lower than those in human milk and milk powder (t = 37.02, 46.02, P < 0.05).
  
  
  CONCLUSIONS
  Both human milk and cow milk contain different types of organic pollutants, some of which have toxic effects on reproduction and human development.
authors.affiliation: Department of Environmental Hygiene, School of Preventive Medicine, the Third Military Medical University, Chongqing 400038, China.
authors.forename: Hui-jie
authors.initials: HJ
authors.lastname: Liu
authors.forename: Jia
authors.initials: J
authors.lastname: Cao
authors.forename: Wei-qun
authors.initials: WQ
authors.lastname: Shu
mesh_terms: D000328:Adult; D000818:Animals; D002417:Cattle; D003993:Dibutyl Phthalate / Q000032:analysis*; D004051:Diethylhexyl Phthalate / Q000032:analysis; D004785:Environmental Pollutants / Q000032:analysis*; D005260:Female; D006801:Humans; D008892:Milk / Q000737:chemistry*; D008895:Milk, Human / Q000737:chemistry*
chemical_list: D004785:Environmental Pollutants; D003993:Dibutyl Phthalate; D004051:Diethylhexyl Phthalate