CN207441654U - A kind of ionic migration spectrometer - Google Patents
A kind of ionic migration spectrometer Download PDFInfo
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- CN207441654U CN207441654U CN201721443983.1U CN201721443983U CN207441654U CN 207441654 U CN207441654 U CN 207441654U CN 201721443983 U CN201721443983 U CN 201721443983U CN 207441654 U CN207441654 U CN 207441654U
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Abstract
The utility model discloses a kind of ionic migration spectrometers, including ionization source and transference tube, ionization source is a vacuum UV lamp, vacuum UV lamp light extraction optical window or so two sides are respectively equipped with first electrode piece and second electrode piece, area is generated in forming reagent ion outside vacuum UV lamp light extraction optical window, inside transference tube, by controlling the placement location of vacuum UV lamp, the internal diameter in vacuum UV lamp lamp cap reagent ion generation area, lamp cap voltage and the direction of air-flow, the generation of reagent ion is controlled, obtains the O of high yield2 ‑(H2O)nReagent ion improves the sensitivity of ion mobility spectrometry, is conducive to the industrialization of ion mobility spectrometry.
Description
Technical field
The utility model is related to the ionization source technologies of ion mobility spectrometry, specifically a kind of ionic migration spectrometer.
Background technology
Ion mobility spectrometry is the technology of a kind of difference according to sample products Ion transfer speed and separation detection, has knot
The advantages of structure is simple, high sensitivity, detection speed is fast.
Ionization source is the important component of ion mobility spectrometry, and effect is that reagent molecule is ionized generation reagent ion,
Reagent ion and example reaction generation product ion, product ion reach in migration area separation and successively inspection under the action of electric field
Device is surveyed, so as to fulfill the separation and detection of target compound.
The vacuum UV lamp of traditional ionization source structure in the negative ion mode, due to the generation and axially and radially of ozone
Diffusion so that the reagent ion of generation is not pure, and ion transfer spectrogram is complicated, is unfavorable for the analysis and detection of sample, so needing
Obtain purer O2 -(H2O)nReagent ion.
Utility model content
The utility model devises a kind of ionic migration spectrometer, it is therefore an objective to solve the generation of ozone under traditional ionization source structure
And axially and radially spread, caused reagent ion is not single, and reactivity is not high, the problem of Ion transfer spectral sensitivity is low, excellent
Point is the volume for reducing ozone formation zone, and gas flow purging reduces the diffusion axially and radially of ozone, vacuum UV lamp
First two electrode slices apply voltage and effectively shift the low-energy electron of generation onto reaction zone, form O2 -(H2O)n, so as to improve examination
The sensitivity of the yield and sample of agent ion.
A kind of ionic migration spectrometer, including ionization source and transference tube, ionization source is a vacuum UV lamp, vacuum ultraviolet
Lamp is placed in the side wall surface on the left of cylindric transference tube, vacuum UV lamp light extraction optical window towards transference tube axis,
And the axis perpendicular of vacuum UV lamp emerging beam and transference tube, along the axis direction of transference tube in vacuum ultraviolet
Lamp light extraction optical window or so two sides are respectively equipped with first electrode piece and second electrode piece, and first electrode piece and second electrode piece are mutually flat
Row；First electrode piece and second electrode piece are connected respectively with high voltage power supply；In outside vacuum UV lamp light extraction optical window, transference tube
Inside forms reagent ion and generates area；
In including the reaction zone close to left side and the ion migration zone close to right side in the transference tube, in ion
The right end of migration tube is equipped with drift gas air inlet, and sample carrier gas air inlet is equipped in the transference tube side wall surface where reaction zone
Mouthful, the reagent molecule import carried by carrier gas is equipped between sample carrier gas air inlet and second electrode piece, in transference tube
Left end be equipped with gas outlet, sample carrier gas and drift gas flow rates be 100-1000ml/min.
Reagent molecule import is connected by pipeline with the outlet of reagent molecule generating means, and reagent molecule generating means is equipped with
The reagent molecule carrier gas air inlet being connected with carrier gas source of the gas, reagent molecule carrier gas air inlet flow rates are 20-200ml/min.
The axial direction that the optical window of vacuum UV lamp generates area with reagent ion is parallel, and the radial direction in area is generated with reagent ion
Direction is vertical, and reagent ion generates the internal diameter in area as 4-8mm, and spacing 20-30mm, is applied between first electrode piece and second electrode piece
The voltage being added between first electrode piece and second electrode piece is 300-1000V.
Description of the drawings
Fig. 1 is a kind of structure diagram of ion mobility spectrometry；
Vacuum UV lamp including 1 side placement, first, second electrode slice 2 and 3 of vacuum ultraviolet lamp cap both sides, 4 reagents
Molecule generating means, 5 reagent molecule carrier gas air inlets, 6 sample carrier gas air inlets, 7 drift gas air inlets, 8 high voltage power supplies and 9
Gas outlet；
Fig. 2 is O under the different sample flow rate of carrier gas of embodiment 12 -(H2O)nThe yield of reagent ion；
Fig. 3 is O under the different drift gas velocities of embodiment 22 -(H2O)nThe yield of reagent ion.
Specific embodiment
A kind of ionic migration spectrometer, including ionization source and transference tube, ionization source is a vacuum UV lamp, vacuum ultraviolet
Lamp is placed in the side wall surface on the left of cylindric transference tube, vacuum UV lamp light extraction optical window towards transference tube axis,
And the axis perpendicular of vacuum UV lamp emerging beam and transference tube, along the axis direction of transference tube in vacuum ultraviolet
Lamp light extraction optical window or so two sides are respectively equipped with first electrode piece and second electrode piece, and first electrode piece and second electrode piece are mutually flat
Row；First electrode piece and second electrode piece are connected respectively with high voltage power supply；In outside vacuum UV lamp light extraction optical window, transference tube
Inside forms reagent ion and generates area；
In including the reaction zone close to left side and the ion migration zone close to right side in the transference tube, in ion
The right end of migration tube is equipped with drift gas air inlet, and sample carrier gas air inlet is equipped in the transference tube side wall surface where reaction zone
Mouthful, the reagent molecule import carried by carrier gas is equipped between sample carrier gas air inlet and second electrode piece, in transference tube
Left end be equipped with gas outlet.
Reagent molecule import is connected by pipeline with the outlet of reagent molecule generating means, and reagent molecule generating means is equipped with
The reagent molecule carrier gas air inlet being connected with carrier gas source of the gas.
The axial direction that the optical window of vacuum UV lamp generates area with reagent ion is parallel, and the radial direction in area is generated with reagent ion
Direction is vertical, and reagent ion generates the internal diameter in area as 4-8mm, and spacing 20-30mm, is applied between first electrode piece and second electrode piece
The voltage being added between first electrode piece and second electrode piece is 300-1000V.
Embodiment 1
A kind of ion spectrometer, including ionization source and transference tube, ionization source is a vacuum UV lamp, and vacuum UV lamp is put
In side wall surface on the left of the cylindric transference tube, vacuum UV lamp light extraction optical window is towards the axis of transference tube and true
The axis perpendicular of empty ultraviolet lamp emerging beam and transference tube, goes out along the axis direction of transference tube in vacuum UV lamp
Two side of light optical window or so is respectively equipped with first electrode piece and second electrode piece, and first electrode piece and second electrode piece are mutually parallel,
First electrode piece and second electrode piece are connected respectively with high voltage power supply, in outside vacuum UV lamp light extraction optical window, in transference tube
Portion forms reagent ion and generates area.
The axial direction that the optical window of vacuum UV lamp generates area with reagent ion is parallel, and the radial direction in area is generated with reagent ion
Direction is vertical, and reagent ion generates the internal diameter in area as 6mm, and spacing 26mm, is applied between first electrode piece and second electrode piece
Voltage between first electrode piece and second electrode piece is 800V.
Include the reaction zone close to left side and the ion migration zone close to right side in transference tube, drift gas is moved by ion
The drift gas air inlet for moving pipe right end enters ion migration zone, and drift gas velocity is 200ml/min, and sample carrier gas is where reaction zone
Transference tube side wall surface on sample carrier gas air inlet enter reaction zone, sample flow rate of carrier gas scope is 100-
1000ml/min, reagent molecule carrier gas is through reagent molecule generating means by pipeline by sample carrier gas air inlet and second electrode piece
Between carrier gas carry reagent molecule import enter in transference tube close to left side reaction zone, reagent molecule carrier gas stream
Speed is 50ml/min, is finally discharged from the gas outlet of transference tube left end.
In the negative ion mode, sample flow rate of carrier gas scope is 100-1000ml/min, ion mobility spectrometry reagent ion O2 -
(H2O)nIon yield stabilization more than 85%, as shown in Figure 2.
Embodiment 2
A kind of ionic spectrum, including ionization source and transference tube, ionization source is a vacuum UV lamp, and vacuum UV lamp is placed in
In side wall surface on the left of cylindric transference tube, vacuum UV lamp light extraction optical window is towards the axis and vacuum of transference tube
The axis perpendicular of ultraviolet lamp emerging beam and transference tube, along the axis direction of transference tube in vacuum UV lamp light extraction
Two side of optical window or so is respectively equipped with first electrode piece and second electrode piece, and first electrode piece and second electrode piece are mutually parallel, the
One electrode slice and second electrode piece are connected respectively with high voltage power supply, in outside vacuum UV lamp light extraction optical window, inside transference tube
It forms reagent ion and generates area.
The axial direction that the optical window of vacuum UV lamp generates area with reagent ion is parallel, and the radial direction in area is generated with reagent ion
Direction is vertical, and reagent ion generates the internal diameter in area as 6mm, and spacing 26mm, is applied between first electrode piece and second electrode piece
Voltage between first electrode piece and second electrode piece is 800V.
Include the reaction zone close to left side and the ion migration zone close to right side in transference tube, drift gas is moved by ion
The drift gas air inlet for moving pipe right end enters ion migration zone, and drift gas velocity scope is 100-1000ml/min, sample carrier gas by
Sample carrier gas air inlet in transference tube side wall surface where reaction zone enters reaction zone, and sample flow rate of carrier gas is
500ml/min, reagent molecule carrier gas is through reagent molecule generating means by pipeline by sample carrier gas air inlet and second electrode piece
Between carrier gas carry reagent molecule import enter in transference tube close to left side reaction zone, reagent molecule carrier gas stream
Speed is 50ml/min, is finally discharged from the gas outlet of transference tube left end.
In the negative ion mode, when drift gas velocity scope is 100-1000ml/min, ion mobility spectrometry reagent ion O2 -
(H2O)nIon yield stabilization more than 85%, as shown in Figure 3.
Claims (3)
1. a kind of ionic migration spectrometer, including ionization source and transference tube, it is characterised in that：The ionization source is purple for a vacuum
Outer lamp (1), vacuum UV lamp (1) are placed in the side wall surface on the left of cylindric transference tube, vacuum UV lamp (1) light extraction optical window
Towards axis and vacuum UV lamp (1) emerging beam of transference tube and the axis perpendicular of transference tube, moved along ion
The axis direction for moving pipe is respectively equipped with first electrode piece (2) and second electrode in vacuum UV lamp (1) light extraction optical window or so two sides
Piece (3), first electrode piece (2) and second electrode piece (3) are mutually parallel；First electrode piece (2) and second electrode piece (3) respectively with
High voltage power supply (8) is connected；Reagent ion, which is formed, outside vacuum UV lamp (1) light extraction optical window, inside transference tube generates area；
In including the reaction zone close to left side and the ion migration zone close to right side in the transference tube, in Ion transfer
The right end of pipe is equipped with drift gas air inlet (7), and sample carrier gas air inlet is equipped in the transference tube side wall surface where reaction zone
(6), the reagent molecule import carried by carrier gas is equipped between sample carrier gas air inlet (6) and second electrode piece (3), in ion
The left end of migration tube is equipped with gas outlet (9).
2. ionic migration spectrometer according to claim 1, it is characterised in that：
Reagent molecule import is connected by pipeline with reagent molecule generating means (4) outlet, and reagent molecule generating means is set on (4)
There is the reagent molecule carrier gas air inlet (5) being connected with carrier gas source of the gas.
3. ionic migration spectrometer according to claim 1, it is characterised in that：
The axial direction that the optical window of vacuum UV lamp generates area with reagent ion is parallel, and the radial direction in area is generated with reagent ion
Vertically, reagent ion generates the internal diameter in area as 4-8mm, spacing 20-30mm between first electrode piece (2) and second electrode piece (3),
The voltage being applied between first electrode piece (2) and second electrode piece (3) is 300-1000V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721443983.1U CN207441654U (en) | 2017-11-02 | 2017-11-02 | A kind of ionic migration spectrometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721443983.1U CN207441654U (en) | 2017-11-02 | 2017-11-02 | A kind of ionic migration spectrometer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220687A (en) * | 2018-11-26 | 2020-06-02 | 中国科学院大连化学物理研究所 | Ion mobility spectrometer with built-in sample introduction region |
| CN111220688A (en) * | 2018-11-26 | 2020-06-02 | 中国科学院大连化学物理研究所 | Ion mobility spectrometer with solid-liquid-gas sampling device |
| CN114068286A (en) * | 2021-11-25 | 2022-02-18 | 中国科学院大连化学物理研究所 | Photoionization source ion migration tube |
-
2017
- 2017-11-02 CN CN201721443983.1U patent/CN207441654U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220687A (en) * | 2018-11-26 | 2020-06-02 | 中国科学院大连化学物理研究所 | Ion mobility spectrometer with built-in sample introduction region |
| CN111220688A (en) * | 2018-11-26 | 2020-06-02 | 中国科学院大连化学物理研究所 | Ion mobility spectrometer with solid-liquid-gas sampling device |
| CN114068286A (en) * | 2021-11-25 | 2022-02-18 | 中国科学院大连化学物理研究所 | Photoionization source ion migration tube |
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