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ISO 4052:1983

Coffee — Determination of caffeine content (Reference method)

Jun 1, 1983
95.99   Withdrawal of Standard   Oct 23, 2013

General information

95.99     Oct 23, 2013

ISO

ISO/TC 34/SC 15

International Standard

67.140.20  

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Scope

The method consists in extracting of the caffeine from a test portion, in an ammoniacal medium, successive purifying, with diethyl ether, on two chromatographic columns, the first in an alkaline medium, the second in an acid medium, followed by elution by chloroform. Spectrometric measurement of the eluate at the wavelength of maximum absorbance (in the ultraviolet region). A first figure shows examples of chromatographic columns. A second figure gives an example of spectrometric measurement.

Life cycle

NOW

WITHDRAWN
ISO 4052:1983
95.99 Withdrawal of Standard
Oct 23, 2013

REVISED BY

ABANDON
ISO/WD 4052

ABANDON
ISO/PWI 4052

National adoptions

SRPS ISO 4052:1997  
ISS

Coffee — Determination of caffeine content (Reference method)

95.99   Withdrawal of Standard

E034-7,8,15,18 more