Ion molecule reactor and setup for analyzing complex mixtures
An ion molecule reactor for generating analyte ions from analytes comprises: a) a reaction volume in which reagent ions can interact with the analytes in order to form analyte ions; b) at least one analyte inlet for introducing the analytes along an inlet path into the reaction volume whereby, preferably, the inlet path runs essentially along at least a first section of the predefined transit path in the reaction volume; c) at least one reagent ion source and/or at least one reagent ion inlet for providing reagent ions into the reaction volume; d) optionally, at least one ion guide comprising an electrode arrangement which is configured for producing an alternating electrical, magnetic and/or electromagnetic field, that allows for guiding the reagent ions and/or the analyte ions at least along a section of the predefined transit path, preferably along the whole transit path, through the reaction volume.
1 . Ion molecule reactor for generating analyte ions from analytes, the ion molecule reactor comprising:
a) a reaction volume in a hollow housing which reagent ions can interact with the analytes in order to form analyte ions;
b) at least one analyte inlet for introducing the analytes along an inlet path into the reaction volume;
c) at least one reagent ion source and/or at least one reagent ion inlet for providing reagent ions into the reaction volume;
d) at least one ion guide comprising an electrode arrangement which is configured for producing an alternating electrical, magnetic and/or electromagnetic field, that allows for guiding the reagent ions and/or the analyte ions at least along a section of the predefined transit path through the reaction volume;
e) the at least one reagent ion source and/or the at least one reagent ion inlet comprising at least one guiding element for guiding reagent ions before entering the reaction volume;
whereby the at least one reagent ion source and/or the at least one reagent ion inlet is/are arranged coaxially around the analyte inlet and
whereby the at least one reagent ion source and/or at least one reagent ion inlet and the at least one analyte inlet are located in front of the hollow housing, and configured to introduce the analytes and the reagent ions into the hollow housing along a direction running in parallel or coaxially with a longitudinal axis of the ion guide and/or the ion molecule reactor.
2 . Ion molecule reactor for generating analyte ions from analytes, the ion molecule reactor comprising:
a) a reaction volume in which reagent ions can interact with the analytes in order to form analyte ions;
b) at least one analyte inlet for introducing the analytes along an inlet path into the reaction volume;
c) at least one reagent ion source and/or at least one reagent ion inlet for providing reagent ions into the reaction volume;
d) at least one ion guide comprising an electrode arrangement which is configured for producing an alternating electrical, magnetic and/or electromagnetic field, that allows for guiding the reagent ions and/or the analyte ions at least along a section of the predefined transit path through the reaction volume;
e) the ion molecule reactor further comprises a tubular element at least partially, surrounding the reaction volume, the tubular element comprising at least one porous and/or gas permeable section for removing neutrals and ions having left the predefined transit path out of the reaction volume.
3 . Ion molecule reactor according to any of claim 1 or 2 , whereby the at least one reagent ion source and/or the at least one reagent ion inlet is configured to produce an overall beam of reagent ions with rotational symmetry or with circular symmetry with regard to an axis defined by a direction of the first section of the transit path, the inlet path and/or the analyte inlet.
4 . Ion molecule reactor according to any of claim 1 or 2 , whereby the ion guide comprises an electrode arrangement with at least two electrodes, whereby the electrodes are individually addressable.
5 . Ion molecule reactor according to any of claim 1 or 2 , whereby the ion guide comprises a multipole electrode arrangement, an ion funnel and/or an ion carpet.
6 . Ion molecule reactor according to any of claim 1 or 2 , whereby reagent ions can be introduced into the reaction volume along at least two distinct directions and/or from at least two distinct positions.
7 . Ion molecule reactor according to claim 1 , whereby the ion molecule reactor comprises at least one porous and/or gas permeable section.
8 . Ion molecule reactor according to claim 2 , whereby the at least one reagent ion source and/or the at least one reagent ion inlet comprises at least one guiding element for guiding reagent ions before entering the reaction volume.
9 . Ion molecule reactor according to any of claim 1 or 8 , whereby the at least one guiding element produces an electrical, magnetic and/or electromagnetic field that allows for guiding the reagent ions before entering the reaction volume.
10 . Ion molecule reactor according to any of claim 1 or 8 , whereby the at least one guiding element comprises an electrode arrangement.
11 . Ion molecule reactor according to claim 5 , whereby the ion funnel comprises a stack of at least two ring electrodes whose inner diameter gradually decreases.
12 . Ion molecule reactor according to any of claim 1 or 2 , whereby the inlet path runs essentially along at least a first section of the predefined transit path in the reaction volume.
13 . Method for generating analyte ions with an ion molecule reactor according to any of claim 1 or 2 comprising the steps of:
a) Introducing analytes into a reaction volume of a chamber of the ion molecule reactor through an analyte inlet;
b) Providing reagent ions and introducing the reagent ions into the reaction volume;
c) Letting the reagent ions interact with the analytes in order to form analyte ions;
d) Guiding the reagent ions and/or the analyte ions with an ion guide along a predefined transit path through the reaction volume.
14 . Method according to claim 13 , whereby the analytes are introduced into the reaction volume along an inlet path into the reaction volume whereby a direction of the inlet path runs essentially along at least a first section of the predefined transit path in the reaction volume.
15 . Method according to claim 13 , whereby the analytes are introduced into the reaction volume in the form of a mixture together with a plurality of further chemical species.
16 . Method according to claim 15 , whereby the mixture comprises or consists of vapour containing substances evaporated from cork.
17 . Method according to claim 13 , whereby the analytes comprise or consist of at least one compound selected from the group of 2,4,6-trichloroanisole (TCA), 2,3,4,6-tetrachloroanisole (TeCA), 2,3,4,5,6-pentachloroanisole (PCA) and 2,4,6-tribromoanisole (TBA).
18 . Method according to claim 15 , whereby the mixture furthermore comprises a carrier gas.
19 . Method according to claim 13 , whereby a pressure in the ion molecule reactor is below 500 mbar.
20 . Method according to claim 13 , whereby the analyte ions are generated from the analytes and the reagent ions by chemical ionisation.
21 . Method according to claim 20 , whereby the reagent ions are chosen such that a population of unprotonated analyte ions (M + ) formed is greater than a population of protonated analyte ions (MH + ) formed.
22 . Method according to claim 13 , whereby the reagent ions are chosen from NO + and/or O 2 + .
23 . Method according to claim 13 , whereby the analyte ions produced in the ion molecule reactor are introduced into a mass analyzer selected from a time-of-flight mass analyzer, a quadrupole mass analyzer, an ion trap analyzer, a sector field mass analyzer, and/or a Fourier transform ion cyclotron resonance analyzer.