Preparation for oxygen sensing film and device and method for measuring micro dissolved oxygen in non-aqueous media

Abstract

The invention discloses preparation for an oxygen sensing film and a device and a method for measuring micro dissolved oxygen in non-aqueous media, and belongs to the technical field of oxygen sensors. Mixed solution prepared from aqueous solution of polyvinylbutyral and ruthenium polypyridyl is coated on a glass slide, and is dried for standby to prepare the oxygen sensing film; the oxygen sensing film is put into a cuvette with a plug; the measuring device consists of nitrogen saturation, oxygen saturation, two peristaltic pumps, the cuvette in which the oxygen sensing film is placed, a fluophotometer, a recorder and an effluent liquid pipe; non-aqueous media to be measured are respectively put into two reagent bottles; one reagent bottle is introduced with O2 to saturation, and the other reagent bottle is introduced with N2 to saturation; the rotating speed of the two peristaltic pumps is accurately adjusted and controlled, so that the total flow rate of the oxygen saturated solution and the nitrogen saturated solution is kept constant; the volume ratio of the oxygen saturated solution to the nitrogen saturated solution is adjusted to prepare non-aqueous media solution to be measured with different oxygen concentration by a tee valve mixing method; the fluorescence intensity is measured under excitation wavelength of 465nm, a Stern-Volmer curve of a sample is drawn, and the fluorescence intensity is reduced along the increase of the oxygen content in the non-aqueous media.

Description

technical field [0001] The invention discloses a preparation of an oxygen-sensitive film, a device and a method for measuring trace dissolved oxygen in a non-aqueous medium, and belongs to the technical field of oxygen sensors. Background technique [0002] The chemical properties of oxygen are very active, and it is a reactant or product of many chemical or biochemical reactions. It exists in many states in nature, and dissolved oxygen is one of them. Dissolved oxygen (Dissolvedoxygen DO) refers to the oxygen that is exchanged between the solution and the atmosphere or dissolved in the solution through chemical and biochemical reactions. Dissolved oxygen is closely related to human production and life. Accurate and rapid determination of oxygen partial pressure or dissolved oxygen in various states is of great significance to environmental science, industrial production, medicine and life science. [0003] Commonly used oxygen sensors can be roughly divided into three cate...

AI Technical Summary

Problems solved by technology

Although it has little effect on the determination of oxygen in the gas phase, if it is used for the determination of dissolved oxygen in solution (especially in non-aqueous media), it will directly affect the performance of the sensor, especially the reproducibility of the measurement results

[0005] However, the current development of oxygen sensors is basically aimed at the determination of dissolved oxygen in water or the partial pressure of gaseous oxygen, and there are very few studies on sensors for the determination of trace dissolved oxygen in non-aqueous media.

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