Direct Analysis of Intact Proteins using the ADVION TOUCH EXPRESS™ Open Port Sampling Interface (OPSI) with the ADVION expressionL Compact Mass Spectrometer

Introduction

The Touch Express OPSI is a new sampling device for mass spec analysis using a technique developed by Gary Van Berkel and Vilmos Kertesz of Oak Ridge National Laboratory[1]. This fast, versatile sample inlet paired with the Advion expression CMS provides simple molecular weight determination of surfaces, solids and liquids in < 30 sec.