National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)
“ Change the position of the valve for switch ing betwe en pum ping aqueous solutions and organic solvents to the position for organic and connect the tubing from the ICP to the end of the HPLC column. Check the valve on the inside of the ICP side panel for leaks. 9. Allow mobile phase to run through ICP for about 10 min before injecting. ”
