A method of measuring an oxygen atom concentration by utilizing a titration technology

A technology of technical measurement, oxygen atom, applied in material excitation analysis, fluorescence/phosphorescence, etc., can solve problems such as complex application
CN105699342AActive Publication Date: 2016-06-22DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2016-06-22

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Abstract

A method of measuring an oxygen atom concentration by utilizing a titration technology is provided. The method adopts nitric oxide as a fluorescent indicator, wherein the nitric oxide and an oxygen atom are subjected to a three-body recombination reaction to generate a nitrogen dioxide excited state molecule, and the excited state molecule emits wide-spectrum fluorescence during spontaneous radiation. The method adopts iodine molecules or mercury atoms, and the like as a titrant. The titrant rapidly reacts with oxygen atoms, the nitrogen dioxide molecule fluorescence quenches when the oxygen atoms are completely consumed through the titrant, and quenching of the nitrogen dioxide molecule fluorescence during titration is adopted as a titration end point. The method only needs to measure the concentration of the titrant, can determine the titration end point by observing the fluorescence of the indicator through naked eyes, and is advantaged by being simple, direct, rapid and convenient.
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Description

technical field

[0001] The invention belongs to the detection field of oxygen atoms, and in particular relates to a method for measuring the concentration of oxygen atoms, which is suitable for electrically excited oxygen-iodine lasers. Background technique

[0002] The first chemical laser operating between electronic states was the oxygen iodine chemical laser, the basic principle of which is:

[0003] metastable particle O 2 ( 1 Δ) Generation:

[0004] Cl 2 +2KOH+H 2 o 2 →O 2 ( 1 Δ)+2KCl+2H 2 o

[0005] Dissociation of iodine molecules (approximately consuming 4-6 singlet oxygen molecules):

[0006] I 2 +nO 2 ( 1 Δ)→2I+nO 2 ( 3 Σ)n=4-6

[0007] metastable particle O 2 ( 1 Δ) Near resonance energy transfer with iodine atom:

[0008]

[0009] Laser emission: I( 2 P 1 / 2 )+hν→I( 2 P 3 / 2 )+2hν(λ=1.315μm)

[0010] In a conventional chemical oxygen-iodine laser, the metastable energy-storing particle O 2 ( 1 Δ) when using toxic and explosive Cl 2 、H...

Claims

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