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ISO 4052:1983

Coffee — Determination of caffeine content (Reference method)
1. 6. 1983.
95.99   Povučen   23. 10. 2013.

Опште информације

95.99     23. 10. 2013.

ISO

ISO/TC 34/SC 15

Međunarodni standard

67.140.20  

francuski   engleski  

Kupovina

Povučen

Jezik na kome želite da primite dokument.

Apstrakt

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.

Životni ciklus

TRENUTNO

POVUČEN
ISO 4052:1983
95.99 Povučen
23. 10. 2013.

REVIDIRAN OD

NAPUŠTEN
ISO/WD 4052

NAPUŠTEN
ISO/PWI 4052

Nacionalna preuzimanja

SRPS ISO 4052:1997  
ISS

Kafa - Određivanje sadržaja kofeina (referentna metoda) (identičan sa ISO 4052:1983)

95.99   Povučen

E034-7,8,15,18 Saznaj više