Alkaline Absorption-Raman Spectroscopy Method for Determination of Nitrogen Oxide Content in Air
A lye absorption and Raman spectroscopy technology, applied in the field of analytical chemistry, can solve the problems of increased blank value, low detector sensitivity, poor specificity, etc. Effect
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[0033] Below in conjunction with embodiment further illustrate invention.
[0034] The method for measuring nitrogen oxides content in air by lye absorption-Raman spectrometry may further comprise the steps:
[0035] (1) Two-way sampling of lye:
[0036] Add 50mL of 0.8g / L sodium hydroxide solution to the lye absorption bottle A and lye absorption bottle B respectively, and then take an oxidation bottle, which contains 10ml of acidic potassium permanganate with a concentration of 25g / L solution, the liquid level in the oxidation bottle is 80 mm. according to figure 1 The two-way sampling system is connected as shown, the gas outlet of the drying bottle is connected to the atmospheric sampler (flow meter and gas sampling pump), and a water-stop clip is set between the two to prevent the solution from being sucked back. At the same time period at the same point in A, the air sampler continuously collects air at a flow rate of L=0.3L / min for 24 hours, and the volume of each sa...
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