Chromatographic fingerprints and quantitative analysis of isoflavones in Tofu-type soybeans

► We detect and identify a total of 19 isoflavones from Tofu-type soybean seeds. ► The chromatographic fingerprint analysis is utilised for qualitative evaluation. ► Development and validation of an LC/UV method for quantitative evaluation. ► A new approach for the quality control of soy isoflavones is established.