Figure 4. Calibration curve relating quantities of caffeine analyzed by thin layer chromatography and areas of the corresponding spots, regression equation and correlation coefficient

From

TLC Procedure for Determination of Approximate Contents of Caffeine in Food and Beverages

Carmen Palacios, Maria L. F. Salatino, Antonio Salatino

World Journal of Chemical Education. 2017, 5(5), 148-152 doi:10.12691/wjce-5-5-1