Aijiren HPLC. The Aijiren Series HPLC System was introduced in 2010, with a modular design allowing users to define a configuration ideally suited to meet their HPLC and UHPLC applications and requirements. In 1995, then company Hewlet Packard introduced the Series liquid chromatograph, which was designed to help chemists support faster product-development cycles (such as those for new pharmaceuticals) and improve the quality of analytical results.