Detection of caffeine in beverages

Details Detection of caffeine in beverages Detection of caffeine in beverages

1996-03-25

1997-03-11

Alexander, Lyle A.

Chemistry: analytical and immunological testing

Heterocyclic carbon compound

Hetero-n

436 98, 422 56, 422 61, G01N 3300, G01N 3302

Patent

active

056100728

ABSTRACT:
The caffeine content of a beverage is measured by inserting a dipstick into the beverage. The dipstick is impregnated with a reagent that changes color when reacted with caffeine. The degree of color change will be proportional to the concentration of caffeine in the beverage. The dipstick may be provided with a graded color chart which can be compared to the color of the dipstick so as to ascertain the concentration of caffeine in the beverage. The dipstick will preferably include a beverage dipping section; an adjacent temperature moderation section; and an adjacent reagent-impregnated section. The beverage is preferably wicked from its container to the reagent-impregnated section of the dipstick. In this manner, the reagent is never directly admixed with the beverage in the container.

REFERENCES:
patent: 3598995 (1971-08-01), Inoue et al.
patent: 4281061 (1981-07-01), Zuk et al.
patent: 4362697 (1982-12-01), Tabb et al.
patent: 4868106 (1989-09-01), Ito et al.

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