A Bipolar Hadamard Transform Ion Mobility Spectrometer
An ion mobility spectrometer and ion mobility spectrometry technology, which is applied in the field of analytical instruments and detection, can solve problems such as reducing the signal-to-noise ratio of ion mobility spectrometry, analyzing and detecting interference, and improving signal background noise, so as to improve ion signal strength and signal Noise ratio, ion signal strength and signal-to-noise ratio are high, and the effect of improving analysis and recognition ability
Active Publication Date: 2019-08-27
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] However, in the Hadamard transform ion mobility spectrometry technique, due to factors such as modulation defects, there are a large number of false peaks in the Hadamard transform ion mobility spectrogram. These false peaks increase the background noise of the signal and reduce the ion mobility spectrum. The signal-to-noise ratio; in addition, the existence of false peaks also brings interference to the analysis and detection of substances
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The present invention will be further described below by taking Hadamard transformation ion gate control module to generate 255-bit periodic digital sequence and air corona discharge ion mobility spectrum negative ion detection as examples.
[0022] Such as figure 1 As shown, the present invention is a bipolar Hadamard transform ion mobility spectrometer, which includes an ion transfer tube 1 , a bipolar Hadamard transform ion gate control module 2 and a signal analysis and processing unit 3 . The ion transfer tube 1 is composed of an ionization source 4 , a reaction area 5 , an ion gate 6 , an ion transfer area 7 and a signal detector 8 . The difference from the traditional ion mobility spectrometer is that the bipolar Hadamard transform ion gate control module 2 first generates a 255-bit positive Hadamard transform gate digital sequence, which contains 127 0s and 128 1s in the 255-bit digital sequence. Among them, 0 means to close the ion gate, and 1 means to open th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a bipolar Hadamard conversion ionic migration spectrometer. The bipolar Hadamard conversion ionic migration spectrometer includes an ion migration tube composed of an ionization source, a reaction zone, an ionic migration zone, an ion gate and a signal detector; a bipolar Hadamard conversion ion gate control module composed of a forward Hadamard conversion control module and a backward Hadamard conversion control module; a signal analysis and data processing unit used for collection of Hadamard conversion ion migration spectrum signals, restoration of superposition spectrums and arithmetical operation. The bipolar Hadamard conversion ion gate control module is connected with the ion gate, generates a forward Hadamard conversion gate control digital sequence and a backward Hadamard conversion gate control digital sequence in sequence, converts the sequences to voltage signals and connects th voltage signals to two ends of the ion gate. The opening and closing of the ion gate are controlled and forward / backward Hadamard conversion ion migration spectrums are obtained. Then through combination of arithmetical operation, the bipolar Hadamard conversion ion migration spectrum is obtained. According to the invention, false peaks in a traditional Hadamard conversion ion migration spectrum can be eliminated or weakened, ion signal strength and signal to noise ratio of the Hadamard conversion ion migration spectrum are increased, and the analysis and identification capability of the Hadamard conversion ion migration spectrum is improved.
Description
technical field [0001] The invention belongs to the field of analysis instruments and detection, in particular to a bipolar Hadamard transformation ion mobility spectrometer. Background technique [0002] Signal-to-noise ratio is one of the core parameters of ion mobility spectrometry. Improving the signal-to-noise ratio of ion mobility spectrometry can effectively reduce the detection limit of ion mobility spectrometry and improve the analysis and detection ability of ion mobility spectrometry. In 2006, scientists applied Hadamard transform technology to ion mobility spectrometry for the first time, and developed a new technology of Hadamard transform ion mobility spectrometry. This technology uses Hadamard transform control module to generate positive periodic digital sequence, which is used to control ion mobility spectrometer ion gate. It can be turned on and off to improve the use efficiency of ions, and finally the signal-to-noise ratio of ion mobility spectrum can be...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H01J49/02H01J49/26
Inventor 黄超群洪炎夏磊沈成银储焰南江海河
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI