Ys Ext 9900 high performance liquid chromatography tandem mass spectrometry detection system is a triple quadrupole mass spectrometer with aim + technology, which can provide the leading sensitivity and resolution in the industry, making it an ideal instrument for the development of quantitative analysis of target substances. It can easily cope with any application from nanoliter flow rate to conventional HPLC high flow rate method, and obtain higher sensitivity of selective ice hockey detection of the lowest level metabolites in peptide quantitative application with high selective reaction monitoring (h-srm) function. Even for very low concentrations in complex biological matrices, our instruments are able to quantitatively analyze all types of compounds. Its simplified workflow and multi-channel technology can maximize the flux, improve the analysis efficiency, and use simple workflow to quickly realize the process from sample analysis to report production. The durability and reproducibility of the instrument can meet the requirements of daily experimental analysis.