The AS-2055/2057 offer 5 operating modes; normal, two methods of pre-column derivatization, dilution, and zerosample loss injection in stand-alone mode. In the zero-sample loss mode, the sample is sandwiched between two zones of mobile phase solvent, and the entire sample volume is drawn into the loop and injected without loss.
The AS-2055/2057 can be easily combined with the JASCO HPLC system and the HSS-2000 software for Windows 2000. The HSS-2000 program offers full automation of your JASCO HPLC system including the AS-2055/2057.