Simultaneous determination of theobromine and caffeine in cocoa by partial least-squares multivariate spectrophotometric calibration
ANALYTICAL LETTERS, vol.31, no.5, pp.859-866, 1998 (SCI-Expanded, Scopus)
- 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.