Table of Contents
iv Applied Biosystems
4.4.4 Filling the Nanospray Spray Tip ..................................... Nano-35
4.4.5 Inserting a Filled Spray Tip ............................................ Nano-36
4.4.6 Reinstalling the Nanospray Head ................................... Nano-38
4.5 Optimizing Signal in Nanospray Mode.................................... Nano-39
4.5.1 Preparing the Workstation ..............................................Nano-39
4.5.2 Optimizing Spray Tip Position and Spray Tip Potential ... Nano-42
4.5.3 Installing the Flow-Assist Air Syringe ............................. Nano-47
Section 5 Microspray and Low-Flow Electrospray
Operation ........................................................................................ Nano-53
5.1 Overview ........................................................................ Nano-53
5.2 Sample, Solvent, and LC Column Guidelines........................... Nano-56
5.3 Connecting Injection Devices............................................... Nano-56
5.4 Preparing Samples............................................................ Nano-59
5.4.1 Filtering ......................................................................... Nano-60
5.4.2 Drop Dialysis ................................................................. Nano-60
5.4.3 Desalting .......................................................................Nano-62
5.4.4 LC Cleanup ....................................................................Nano-62
5.5 Preparing the Microspray/ Low-Flow Electrospray Spray Tip........ Nano-63
5.6 Optimizing Signal in Microspray/ Low-Flow Electrospray Mode .... Nano-64
5.6.1 Preparing the Workstation ..............................................Nano-64
5.6.2 Optimizing Spray Tip Position and Spray Tip Potential ... Nano-66
Section 6 Maintenance ............................................................... Nano-73
6.1 Replacing the Nanospray Head O-Ring.................................. Nano-73
6.2 Flushing the Microspray/ Low-Flow Electrospray Tip.................. Nano-75
6.3 Replacing the Microspray/ Low-Flow Electrospray Fused Silica
Spray Tip and Capillary................................................................. Nano-76
6.3.1 Microspray Spray Tip Specifications and Overview ........ Nano-76
6.3.2 Low-Flow Electrospray Spray Tip Specifications
and Overview ................................................................. Nano-78
6.3.3 Removing the Spray Head .............................................Nano-79