Table 2. Pairwise comparison matrix to assess the relative astringency of polyphenols.
| as compared to | EC | EGC | ECG | EGCG | methyl gallate |
score |
|---|---|---|---|---|---|---|
| EC | 0 | −1 | −1 | 0 | −2 | |
| EGC | 0 | −1 | −1 | 0 | −2 | |
| ECG | 1 | 1 | 0 | 1 | 3 | |
| EGCG | 1 | 1 | 0 | 1 | 3 | |
| methyl gallate | 0 | 0 | −1 | −1 | −2 |
An entry “1” indicates the polyphenol in the row to be more astringent than the polyphenol of the corresponding column at an equimolar concentration (5.0 mmol/L), “−1” indicates the polyphenol in the row to be less astringent as compared to the polyphenol in the respective column, and “0” implies no difference between the pairs. Polyphenols were overall ranked in astringency by horizontally adding up the scores of each compound: EGCG (3) ≈ ECG (3) > EGC (−2) ≈ EC (−2) ≈ methyl gallate (−2).