Method for rapidly detecting nitrogen, absorbed by atoms, in expiratory air

Abstract

The invention discloses a method for rapidly detecting nitrogen, absorbed by atoms, in expiratory air. The method comprises the following steps that alveolar air in the expiratory air is collected, exhaust gas is discharged, component separation is carried out, a nitrogen component obtained through separation of a chromatographic separation column enters a micro plasma detector, is stimulated by existing high-energy metastable-state particles in the micro plasma detector and jumps back to a ground state to give out characteristic light signals, the characteristic light signals are transmitted to a spectrometer through optical fibers for detection processing and processed through a computer, data are stored, and rapid detection on the nitrogen in the expiratory air is achieved. A specially designed expiratory air selective collector is adopted, the alveolar air in the expiratory air can be collected rapidly, easily and conveniently, pollution and attenuation on the expiratory air by dead volume gas is avoided, complex operation for collecting the alveolar air by measuring CO2 concentration in the expiratory air is avoided, the method is simple, detection of the expiratory air can be achieved stably and repeatedly, and therefore stable and reliable detection results can be obtained.

Description

technical field [0001] The invention specifically relates to a rapid detection method for nitrogen in exhaled gas by atomic absorption. Background technique [0002] The occurrence of many diseases in the human body is related to changes in trace amounts of volatile organic compounds (volatile organic compounds, VOCs) in exhaled breath. For example, before the onset of disease symptoms, the oxidative stress in the human body will be different, corresponding to [0003] The corresponding VOCs will appear in the exhaled breath. The reported VOCs include isoprene, acetone, a series of alkanes represented by pentane, etc. These VOCs widely exist in the exhaled breath of different individuals, and reflect certain human physiological and pathological conditions. Since the products of human metabolism can be transported to the lungs through the blood, enter the alveoli through gas exchange and appear in the alveoli [0004] Exhaled breath, in recent years, breath detection has ...

AI Technical Summary

Problems solved by technology

However, conventional blood collection often requires collection of venous blood or fingertip blood samples. Too many collections will bring great pain to patients, especially the elderly, pregnant women and children, and it is inconvenient to monitor the condition in real time.