The "RF-10 AXL" is a highly sensitive detector for determining derivatized amino acids and other compounds showing fluorescent activity in trace analysis. The instrument offers an improved Raman line signal/noise ratio and wavelength accuracy. Light intensity fluctuations are compensated with a new procedure, therefore, minimizing the noise level. Several integrated GLP functions such as self diagnosis or displaying service information (e.g. lamp energy and number of operating hours) demonstrate some of the powerful options.