9.4.   Quaternary Mixtures by the SPR Setup and the RIfS Array

9.4.1.   Introduction

In this chapter, the quaternary mixtures of methanol, ethanol, 1-propanol and 1-butanol measured by the RIfS array and the SPR setup are investigated. This allows a comparison of the two setups. The RIfS array shows a significantly worse signal to noise ratio than the SPR setup using Makrolon as sensitive layer. Thus, more time of exposure to analyte was necessary for the RIfS array setup than for the SPR setup. Additionally, it is investigated if the smoothing of the data of the RIfS array can improve the calibration (similar to the last section). More details of the data sets can be found in section 4.5.2.4.