Non-radioactive method for online monitoring ammonia
An ammonia gas and carrier gas technology, which is applied in the field of subordinate ion mobility spectrometry, can solve problems such as limiting wide application, and achieve the effect of improving selectivity and facilitating large-scale application.
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[0026] Reagent molecule-assisted photoionization positive ion mobility spectrometry is used to detect ammonia gas, and the reagent molecules of acetone, 2-butanone and p-xylene are optimized to be screened. The drift flow rate range is 200-400ml / min, and the tail gas flow rate range is 350-650ml / min. The electric field strength range in the migration zone is 200-250V / cm, and the ion migration spectrum of ammonia gas is shown in figure 2 with image 3 As shown, there is no signal response of ammonia gas when acetone and anisole are added as reagent molecules. Such as Figure 4 with 5 As shown, both 2-butanone and p-xylene have signal responses when they are used as reagent molecules, but the product ions of the obtained ammonia gas are different, and the reduced mobility of the reagent ions 2-butanone and p-xylene are 1.66cm 2 V -1 the s -1 , 2.00cm 2 V -1 the s -1 , the reduced mobility of the product ions are 1.74 cm 2 V -1 the s -1 , 2.37cm 2 V -1 the s -1 , ...
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