There are many methods for classifying pharmaceutical preparation liquid chromatographs. 1. According to the purpose of separation: laboratory pharmaceutical preparation liquid chromatograph and industrial pharmaceutical preparation liquid chromatograph. 2, according to the separation scale can be divided: small pharmaceutical preparation liquid chromatograph and large pharmaceutical preparation liquid chromatograph. 3, according to the polarity of the stationary phase and the mobile phase can be divided into: normal phase pharmaceutical preparation liquid chromatograph and reverse phase pharmaceutical preparation liquid chromatograph. 4, according to the scope of application can be divided into: dedicated pharmaceutical preparation liquid chromatograph and general-purpose pharmaceutical preparation liquid chromatograph. 5, according to the origin can be divided: domestic pharmaceutical preparation liquid chromatograph and imported pharmaceutical preparation liquid chromatograph. 6, according to the number of gradients can be divided: pharmaceutical preparation binary gradient liquid chromatography, pharmaceutical preparation ternary gradient liquid chromatography and pharmaceutical preparation quaternary gradient liquid chromatography. Shanghai Jiapeng Technology Co., Ltd. specializes in: UV analyzer, three-use UV analyzer, dark box UV analyzer, black box UV analyzer, black box UV analyzer, portable UV analyzer, three-use UV analyzer, dark box , UV detectors, partial collectors, constant current pumps, peristaltic pumps, gel imaging systems, gel imaging analysis systems, chemiluminescence imaging analysis systems, photochemical reactors, vortex mixers, vortex mixers, glass chromatography columns, Gradient mixer, gradient mixer, nucleic acid protein detector, glass chromatography column, fluorescent whitening agent analyzer, fraction collector, rubber cutting instrument, blue gel cutting instrument, chromatography system and other products. Welcome to inquire. wireless pet fence,pet fence outdoor,pet fence indoor,portable pet fence,invisible pet fence AUTRENDS INTERNATIONAL LIMITED , https://www.petspetsproducts.com