Simultaneous determination of theobromine and caffeine in cocoa by partial least-squares multivariate spectrophotometric calibration


Aksu O. , Bozdogan A. E. , KUNT G.

ANALYTICAL LETTERS, cilt.31, ss.859-866, 1998 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 31 Konu: 5
  • Basım Tarihi: 1998
  • Doi Numarası: 10.1080/00032719808002823
  • Dergi Adı: ANALYTICAL LETTERS
  • Sayfa Sayıları: ss.859-866

Özet

The use of partial least - squares multivariate spectrophotometric calibration for the simultaneous determination of theobromine and caffeine in cocoa is presented. The results show that these components in a molar ratio of about 6 : 1 in cocoa have been determined simultaneously with standard deviations of about 0.05 and 0.02 for theobromine and caffeine, respectively.