The used Waters 2410 refractive index detector has a 10 µl flow cell and uses an LED as a light source. The measurement range of the refractive index is between 1.00 and 1.75 RIU. The flow rate can be adjusted from 0.03 up to 10 ml/min. Additionally there are sensitivity settings at values of 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 and 1024. The analog outputs range from -2.0V to +2.0V Labprocure is responsible for this device .