Used to detect and quantify D-galacturonic acid in biological and food samples through a colorimetric reaction. The kit is commonly applied in research and quality control to measure pectin degradation products, as D-galacturonic acid is a primary unit of pectin. It is useful in studying plant cell wall metabolism, monitoring enzymatic activity of pectinases, and analyzing food composition, especially in fruit processing and juice production. The colorimetric method allows measurement using a spectrophotometer, providing a simple and reliable way to assess concentration based on color intensity.