Method for detecting acid value of vegetable oil containing oryzanol
A technology of vegetable oleic acid and detection method, applied in the field of vegetable oil detection, can solve the problems of color interference, difficulty in observing indicator discoloration, difficulty in judging the titration end point, etc., to achieve the effect of improving accuracy
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[0030] Oil samples: corn oil without oryzanol (oil sample 1), corn oil with oryzanol content 1700mg / kg (oil sample 2), corn oil with oryzanol content 5000mg / kg (oil sample 3), oryzanol content 8000mg / kg corn oil (oil sample 4), oryzanol content 10000mg / kg corn oil (oil sample 5), oryzanol content 15000mg / kg corn oil (oil sample 6), oryzanol content 17000mg / kg corn oil (oil sample 7), oryzanol content 19000mg / kg corn oil ( Oil sample 8), oryzanol content 20000mg / kg corn oil (oil sample 9).
[0031]Reagent: the preparation method of potassium hydroxide-ethanol standard solution comprises the following steps: take by weighing 7.5-8g of potassium hydroxide, place it in a polyethylene container, add 6-7ml of water to dissolve, dilute to 1000mL with 95% ethanol, Place it airtightly for 24 hours, siphon the supernatant liquid into another polyethylene container with a plastic tube; weigh 0.75g of the working standard reagent potassium hydrogen phthalate and dry it in an electric oven...
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