%0 Journal Article
%T Immediate drop on demand technology (I-DOT) coupled with mass spectrometry via an open port sampling interface.
%A Van Berkel GJ
%A Kertesz V
%A Boeltz H
%J Bioanalysis
%V 9
%N 21
%D Nov 2017
%M 29095038
%F 2.695
%R 10.4155/bio-2017-0104
%X <B>OBJECTIVE: </B>The aim of this work was to demonstrate and evaluate the analytical performance of coupling the immediate drop on demand technology to a mass spectrometer via the recently introduced open port sampling interface and ESI. Methodology & results: A maximum sample analysis throughput of 5 s per sample was demonstrated. Signal reproducibility was 10% or better as demonstrated by the quantitative analysis of propranolol and its stable isotope-labeled internal standard propranolol-d7. The ability of the system to multiply charge and analyze macromolecules was demonstrated using the protein cytochrome c.<BR><B>CONCLUSIONS: </B>This immediate drop on demand technology/open port sampling interface/ESI-MS combination allowed for the quantitative analysis of relatively small mass analytes and was used for the identification of macromolecules like proteins.