Accessories and Standards

Column Switching Valve (EcoSEC HT)

The optional Column Switching Valve allows the user to reduce column switching time and easily switch between low MM and high MM range columns on the EcoSEC® High Temperature GPC System with RI Detector.  This option can help to eliminate temperature related baseline drift that is normally seen following a column change.  By installing an optional column switching valve and replacing the reference column with another analytical column, an analysis can be performed on column 1 while equilibrating column 2. After switching the valve, column 2 becomes the analytical column while column 1 will be in the flow path to the reference side of the RI detector flow cell. Since the column switching valve changes column sets while the oven door remains closed and switches to an already equilibrated column set, a stable baseline is rapidly established.


23804Column Switching Valve (EcoSEC HT)1,955


Overlay of Refractive Index Detector Signals During Equilibration Following a Column Change Using the Column Switching Valve (Blue) and Without Use of the Column Switching Valve (Red)



A: Flow Path with Column 1 as the Analytical Column 



B: Flow Path with Column 2 as the Analytical Column