Objective To study the best formulation and technology of quercetin-loaded polylactic-co-glycolic acid-D-α-tocopheryl polyethylene glycol 1000 succinate( PLGA-TPGS) nanoparticles( QPTN) with QT as model drug and PLGA-TPGS as polymer materials by orthogonal tests,and to investigate the in vitro stability of QPTN. Methods To ensure the best formulation and technology for preparing QPTN,single-factor test was established to determine the influence of the ratio of quercetin to PLGA-TPGS,the concentration of TPG...