Calibration Science, Part III: Calibration Lines and Correlation Coefficients.

This article discusses the process of creating calibration lines and calculating correlation coefficients in calibration science. It uses the example of measuring the amount of isopropyl alcohol (IPA) dissolved in water using mid-infrared spectroscopy. The article explains how calibration lines are two-dimensional mathematical models that relate two sets of data, and how the correlation coefficient measures the linearity of the relationship between the data sets. It also emphasizes the importance of using calibration lines only within the range of calibration data. The article provides examples and equations to illustrate these concepts. [Extracted from the article]