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Table 2 Lipid oxidation indices of maize oil used in the experiment

From: Addition of tert-butylhydroquinone (TBHQ) to maize oil reduces lipid oxidation but does not prevent reductions in serum vitamin E in nursery pigs

Maize oila Unoxidized Oxidized
Antioxidantb + +
Oil used in phase 1 diets
 Peroxide value, mEq O2/kgc 1.85 1.99 5.98 3.75
 TBARS, mg MDA/gd,e 0.06 0.06 0.11 0.12
 AnVf 3.0 3.1 134.9 131.9
 Oil stability index, h 20.85 28.30 16.05 27.20
Oil used in phase 2 diets
 Peroxide value, mEq O2/kg 1.95 2.00 5.99 5.89
 TBARS, mg MDA/g 0.06 0.06 0.11 0.11
 AnV 3.1 3.3 140.8 142.0
 Oil stability index, h 10.25 23.15 4.65 11.15
  1. aOils were sampled after manufacturing phase 1 and 2 diets (15 d after mixing phase 1 diets), and stored at −20 °C until analysis at the University of Missouri Agricultural Experiment Station Chemistry Laboratory
  2. bAntioxidant = Rendox CQ (active ingredient is TBHQ; Kemin Industries, Des Moines, IA) was added at 1000 mg/kg in maize oil
  3. cMilliequivalents peroxide per kg of oil. W/W% = g/100 g of sample
  4. dTBARS = thiobarbituric acid reactive substances
  5. eMDA = malondialdehyde
  6. fAnV = p-anisidine value