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

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

ANALYTICAL LETTERS, vol.31, no.5, pp.859-866, 1998 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 5
  • Publication Date: 1998
  • Doi Number: 10.1080/00032719808002823
  • Journal Name: ANALYTICAL LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.859-866
  • Yıldız Technical University Affiliated: Yes

Abstract

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.