Cholesterol Levels in Vegetable Oils Produced in Burkina Faso

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Résumé

Vegetable oils are widely produced and consumed in Burkina Faso. The objective of this work is to evaluate the cholesterol level, refractive value and saponification value of crude peanut oils and refined cottonseeds oils produced in Burkina Faso. The study was carried out on 61 samples of refined cottonseeds oils and crude peanut oils collected in Ouagadougou, Bobo Dioulasso and surrounding areas. Cholesterol level was evaluated by HPLC, refractive and saponification values were determined by physico-chemical standard methods. The results show that 64.52% of the saponification value of peanut oils fall within the compliance range of the Codex Alimentarius standard compared to 63.33% for cottonseeds oils. The average saponification values are respectively 192.06 mg KOH/g and 194.16 mg KOH/g for crude peanut oils and refined cottonseeds oils (p>0.05). All cottonseeds oils have refractive value in accordance with the Codex Alimentarius standard while 90.32% of peanut oils have refractive value in accordance with the standard. The average refractive value are 1.468 and 1.471 for crude peanut oils and refined cottonseeds oils respectively (p<0.05). The majority of the refractive value and saponification value show an acceptable level in terms of oils for food consumption. Cholesterol was detected in 20% and 38.70% of the peanut oils and cottonseeds oils samples analyzed respectively. The cholesterol averages are 0.64 and 2.49 mg/100g for crude peanut oils and refined cottonseeds oils respectively (p>0.05). Almost all cholesterol values of different oil samples are lower to the Codex Alimentarius standard.

Mots-clés

cholesterol, saponification value, refractive value, cottonseeds oils, peanuts oils