Acid Value. Example Determination. Figure 1: Determination of the acid value (blue = titration curve, pink = ERC). Comments. ASTM D7253 is similar to ASTM D4662. The key differences are ...

Fig 1. Determination of the acid value (blue = titration curve, pink = ERC). Image Credit: Metrohm Middle East FZC. Comments . For less soluble materials, it is recommended that the sample size is ...

The quantity of potassium hydroxide needed for neutralization of half of the anhydride groups, all free acids and all carboxyl-terminated groups of an unsaturated polyester resin (UPR), is indicated ...

In the case of certain plant tissues, then, a simple extraction and titration procedure does not give the complete value of ascorbic acid, but only measures the free acid. Nature - Estimation of ...

WHEN an equal volume of 3 percent hydrogen peroxide is added to a slightly acidified ascorbic acid solution, no appreciable effect on the indophenol titration value is observed, unless iron or ...

Acid value, hydroxyl value, and isocyanates in raw materials for the fabrication of plastics by automatic potentiometric titration Sample Source: Metrohm Middle East FZC ...