Organic matter detection device and method for anion proton counter-transference reaction mass spectrometry

Abstract

The invention provides an organic matter detection device and method for an anion proton counter-transference reaction mass spectrometry. The organic matter detection device comprises a gas discharge anion source, a reaction tube, an anion mass spectrometry detection system, a discharge power source, an ion extraction power source and an ion drift power source, wherein the reaction tube is positioned between the gas discharge anion source and the anion mass spectrometry detection system; the gas discharge anion source consists of a discharge cathode, a discharge anode, a discharge gasket and an extraction gasket, the discharge cathode is positioned at the top end of the gas discharge anion source, the discharge gasket is positioned between the discharge cathode and the discharge anode, and the extraction gasket is positioned between the discharge anode and the reaction tube; a discharge gas inlet is formed in the discharge cathode, and a discharge gas pumping hole is formed in the extraction gasket; the reaction tube consists of a sample introduction electrode, a tail electrode, a plurality of ring electrodes and ring gaskets, the negative pole of the discharge power source is connected in series with a resistor and connected with the discharge cathode, and the positive pole of the discharge power source is connected with the discharge anode. Through electric field extraction and guiding of negative reaction ions, such as OH<-1>, the organic matter detection device and method for the anion proton counter-transference reaction mass spectrometry are successfully realized.

Description

technical field [0001] The invention belongs to the field of analysis and detection, and in particular relates to an organic matter detection device and a detection method of negative ion proton reverse transfer reaction mass spectrometry. Background technique [0002] Flow afterglow mass spectrometry studies show that: H 3 O + Positive reactive ions can undergo proton transfer reaction with organic matter, provide protons to organic matter, and ionize organic matter; OH - Negative ions can also be used as reactive ions to undergo a proton reverse transfer reaction with organic matter, that is, to extract protons from the organic matter to be tested and ionize the organic matter (Patrik Spanel, International Journal of Mass Spectrometry and Ion Processes, 145 (1995) 177-186). H 3 O + or OH - Both ions and organics have high rate constants, and have broad application prospects in the field of trace detection, especially OH - Plasma negative ions have more advantages in ...

AI Technical Summary

Problems solved by technology

However, the electric field extracts OH - The proton reverse transfer reaction mass spectrometry of negative reactant ions has not been successfully realized in public reports

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