简介:For the determination of vitamin C, there are two main methods; iodine titration method and
indophenol method. In this application note, vitamin C is quantified by titrating with indophenol
titrant after acidifying the简介:For the determination of vitamin C, there are two main methods; iodine titration method and
indophenol method. In this application note, vitamin C is quantified by titrating with indophenol
titrant after acidifying the sample with a mixture of metaphosphoric acid and acetic acid
solution. The end point will be determined in the presence of an excess of indophenol, at the
moment where the color of the solution changes from blue to red. This color change is
detected photometrically in this measurement.
Citric acid contained in fruit juice is quantified by acid/base titration with sodium hydroxide. The
chemical reaction occurring in this titration is shown by the following formula.详细>