acid value


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acid value

[′as·əd ′val·yü]
Also known as acid number.
(chemistry)
The acidity of a solution expressed in terms of normality.
(organic chemistry)
A number indicating the amount of nonesterified fatty acid present in a sample of fat or fatty oil as determined by alkaline titration.
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When the reaction time increased to 5 h, the hydrolysis and polymerization side reactions were increased and this situation was caused increase to acid value and molecular weight of WIF products.
Results of acid value are presented in the Tables 1, 2, 3 and show the same trend for all the three brands.
The Acid Value (AV) is a direct measure of FFAs in the biodiesel.
Acid values (AV--reported in mg of KOH/g of polymer sample) for all polymers were measured by titration method ASTM D-974, which was modified by using potassium hydrogen phthalate (KHP) in place of hydrochloric acid and phenolphthalein as an indicator in place of methyl orange.
Acid value, peroxide value, saponification value and iodine value are also indicators of edible oils that are suitable for food, cosmetic, soap making and lubricants since increase in these values can be associated with rancidity of oils due to oxidation.
Thiobarbituric acid value (TBA values), apparent metabolisable energy (AME) and true metablolisable energy (TME) values of rice polishing Storage period Treatment (weeks) Antioxidant 1 0 Yes 2 0 No 3 4 Yes 4 4 No 5 8 Yes 6 8 No 7 12 Yes 8 12 No 9 16 Yes 10 16 No Significance Storage Antioxidant TBA [+ or -] SE AME [+ or -] SE Treatment (mg MDA/kg) (MJ/kg) 1 0.
01 Table 3: Some Physico-chemical Properties of Lipid (oil) extract from Kargo (Piliostigma reticulatum) Seed Physico-chemical property Value Acid value (%) 0.
Free Fatty Acid value of oil from the oven-dried sample was 6.
The reaction was monitored by periodic determination of percent oxirane oxygen content and acid value of the sample.
5 and the desired acid value was less than 30 mg of KOH per gram of sample.
polyester with Tg at least 60[degrees]C, acid value at least 60, to yield a stable paste or suspension, which is then dried.
It contains polyurethane based on polyester polyol(s), Mn 1000-4000, acid value preferably zero to 10, OH no.