As an excellent buffer, the main function of CAPS is to stabilize the pH value of the solution. In analytical chemistry, many reactions are very sensitive to changes in pH value. Therefore, using CAPS as a buffer can effectively control the pH of the solution, improve the repeatability and reliability of the reaction. For example, in acid-base titration, it can be used as a titrant to accurately determine the acidity or alkalinity of the sample by adjusting the pH value of the solution. It can also improve the accuracy of analysis. In analytical chemistry, many analytical methods require specific pH conditions. Using CAPS as a buffer can maintain the stability of the solution pH, reduce errors, and improve the accuracy of analysis. For example, in spectrophotometry, it can be used as a buffer to maintain the stability of the solution pH value, thereby improving the accuracy of the measurement. In addition to being widely used in conventional chemical analysis, it also plays an important role in biochemical analysis. For example, it can serve as a buffer for enzyme reactions, providing a suitable reaction environment for enzymes and maintaining stable enzyme activity. In addition, it can also be used to prepare various biological buffers, providing a suitable environment for biochemical reactions, and improving the efficiency and accuracy of the reaction. In addition to the aforementioned applications, CAPS has other broad applications in analytical chemistry. For example, it can be used as a termination electrolyte in capillary electrophoresis analysis, to increase the retention sensitivity of sulfites during flow injection, and to prepare various agar culture media. These applications fully demonstrate the important role of CAPS in analytical chemistry.