Aijiren Autosampler - GenTech Scientific. The Aijiren HPLC Autosampler is a variable volume autosampler with a sample capacity of 100 samples. Features Injection Range: 0.1 – 900 µl in 0.1 µl increments Injection Cycle Speed: 50s for draw speed 200 µl/min, ejection speed 200 µl/min.