The pump is the heart of HPLC and it must must must a constant and pulse-free flow (stability: less than f0.5%, or usually ly s than than 0.1 sl/min) who must must be reproducible under high pressures to 50 MPa. The in-one volume of the pump must be very small to<br>enable rapid eluent changes and enable a precise gradient to be formed.<br> Widely ly used are the syringe pump and comuating piston pumps.<br> A syringe pump is used for micro-scale liquid chromatography and capilary liquid/supercritical fluid chromatography.<br> The most most widely-used double-piston comauto is for a wide range of flow rates, semi-micro LC to the preparative-scale LC under high pressure.<br> The master/slave moonating pump: one piston works to pump the eluent and the second piston works as the flow.<br> A precise flow rate (1 sl/min) the re-rinol of the elution on the standard size column (6 mm s column i.d. s 3 mm) ...
正在翻譯中..