A kind of determination method of trace dissolved oxygen in organic solvent
An organic solvent and measurement method technology, applied in the field of sensors and analytical chemistry, can solve the problems of accelerated production equipment corrosion and influence, and achieve the effects of long stability, sensitivity and rapid response, and good reproducibility and reversibility.
Active Publication Date: 2018-11-16
JIANGNAN UNIV
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Problems solved by technology
However, dissolved oxygen in organic solvents will not only affect the progress of some organic reactions, but may also accelerate the corrosion of production equipment
Method used
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Effect test
Embodiment 1
[0029] Example 1. With the prepared oxygen sensitive membrane, use figure 1 The measuring device shown determines dissolved oxygen in 1,3-butanediol at room temperature (25° C.).
Embodiment 2
[0030] Example 2. With the prepared oxygen sensitive membrane, use figure 1 The measuring device shown determines dissolved oxygen in chloroform at room temperature (25° C.).
Embodiment 3
[0031] Example 3. With the prepared oxygen sensitive membrane, use figure 1 The measuring device shown determines dissolved oxygen in toluene at room temperature (25° C.).
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The invention discloses a determination method for trace dissolved oxygen in an organic solvent, belonging to the technical field of sensors in the field of analytic chemistry. The determination method is characterized in that mixed liquid prepared by polyvinyl alcohol and octaethyl platinum porphyrin solution is smeared on a glass slide, and then is dried to prepare an oxygen-sensitive film. A detection device for the trace dissolved oxygen in the organic solvent comprises a nitrogen-saturated sample, an oxygen-saturated sample, peristaltic pumps, a cuvette, a fluorophotometric instrument and a recorder. Two cups with covers contain the nitrogen-saturated sample to be determined and the oxygen-saturated sample to be determined respectively, the contents of the nitrogen-saturated sample and the oxygen-saturated sample are adjusted by adjusting the flow speeds of the two peristaltic pumps, the samples to be determined are mixed by a three-way valve to form test liquid with different dissolved-oxygen concentrations, finally the test liquid enters the cuvette containing the oxygen-sensitive film, the fluorescence intensity is determined by using the fluorophotometric instrument for detection under the excitation wavelength of 535nm, a Stern-Volmer curve is drawn and the content of the dissolved oxygen in the organic solvent is measured.
Description
technical field [0001] The invention relates to the preparation of an oxygen-sensitive film and a method for measuring trace amounts of dissolved oxygen in an organic solvent, belonging to the technical field of sensors in the field of analytical chemistry. Background technique [0002] Dissolved oxygen refers to the oxygen that is exchanged between the solution and the atmosphere or dissolved in the solution through chemical or biochemical reactions. The detection of dissolved oxygen has always been the focus of attention in the fields of biology, medicine and environmental monitoring. It is closely related to human production and life, and it is of great significance to accurately and quickly measure oxygen partial pressure or dissolved oxygen in various states. [0003] Commonly used oxygen sensors are roughly divided into the following three categories: O 2 Microelectrode sensor (cathode type), O 2 Microelectrode sensor (Clark type) and O 2 microfiber sensor. There ...
Claims
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IPC IPC(8): G01N21/64
Inventor 朱振中陈旸
Owner JIANGNAN UNIV
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