Sialic acid (SA) forms a purple red complex with methyl resorcinol in the presence of oxidant, and the absorbance conforms to Lambert-Beer law. By measuring the absorbance of the complex, the sialic acid content can be calculated.
Applications
It is used to detect the content of sialic acid in serum, plasma, saliva, urine, pleural effusion and animal and plant tissue samples.
Procedure
1. Prepare standard samples and experimental samples. 2. Add reaction reagents in order for reaction. 3. Measure the absorbance of each tube. 4. Make the mark curve and calculate the result.