Skip to main content
. 1999 Dec 18;319(7225):1600–1602. doi: 10.1136/bmj.319.7225.1600

Table 2.

Polyphenol content of martinis compared with white wine and blended Scotch whisky

Sample No of samples Catechin equivalent concentration (mmol/l)
Mean SE 95% CI
Shaken martini 8 0.056 0.005 0.044 to 0.068
Stirred martini 9 0.060 0.009 0.039 to 0.081
Sauvignon white wine 9 0.592 0.030 0.523 to 0.661
Scotch whisky 9 0.575 0.025 0.517 to 0.633

Assay performed by adding 20 μl sample to 980 μl Folin reagent diluted 1/10 with distilled water; colour allowed to develop for 0.5-2.5 hours the absorbance of the solution at 750 nm was read. Samples were compared with a standard curve prepared by adding 10-50 μl of 1 mmol/l catechin solution to Folin reagent. Standard curves measured on three days had R2 values of 0.9984-0.9999.