Related Experiment Video
Updated: Jul 3, 2026

Tea Aroma Analysis Based on Solvent-Assisted Flavor Evaporation Enrichment
Published on: May 26, 2023
Evaluation of the umami taste intensity of green tea by a taste sensor
Nobuyuki Hayashi1, Roggang Chen, Hidekazu Ikezaki
1National Institute of Vegetable and Tea Science, 2769 Kanaya, Shimada, Shizuoka 428-8501, Japan. hayn@affrc.go.jp
Abstract:
A method for evaluating the umami taste intensity of green tea by a taste sensor system was established. Interference in the measurement from catechins was solved by removing the catechins from sample solutions with poly(vinylpolypyrrolidone). A 5.00 mM aqueous solution of glutamic acid monosodium salt was used as the standard solution. Sensor outputs were converted into EIT uma (estimated intensity of taste concerning umami) values. One unit on the EIT uma scale was defined as the amount of the sensor output corresponding to a difference in 1.2 times the concentration of the standard substance (glutamic acid monosodium salt). The umami taste intensity of green tea was classified into six grades on the EIT uma scale. Sensory tests proved that the EIT uma value had a high correlation to the human gustatory sense.
Related Concept Videos
Gustation
The Physiology of Taste
Taste Buds and Receptors
Conditioned Taste Aversion
A notable characteristic of conditioned taste aversion is that it often requires only a single exposure...

