Microsensor for monitoring phosphine and preparation method thereof
AssigneeSensix (Nanjing) Environmental Technology Co., Ltd.
InventorFuxing Kang
Life of this patent
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Abstract
A microsensor for monitoring phosphine and a preparation method thereof are provided, where the microsensor includes an interfering substance removal module, used to remove other impurity gases and keep a phosphine gas; a phosphine signal measuring module, used for measuring a concentration of the phosphine gas; a guard electrode, used to consume excess phosphine gas in the microsensor; and a power supply module, used for supplying power to the phosphine signal measuring module and the guard electrode; the power supply module is respectively connected with the phosphine signal measuring module and the guard electrode; and the interfering substance removal module is located at a front end of the guard electrode.
Claims3
A method for preparing a detective element of a microsensor for monitoring phosphine, comprising:
- preparing a working electrode and a guard electrode, wherein the working electrode comprises a micron-sized platinum wire tip and a platinum wire tail end;
- preparing an electrode protective sleeve based on the micron-sized platinum wire tip;
- developing an electrode protective outer shell;
- assembling the working electrode and the guard electrode into the electrode protective outer shell and sealing the electrode protective outer shell;
- assembling a reference electrode and filling with acidic electrolyte;
- and
- sealing an electrode connection system to complete an assembly of the detective element,
- wherein the process of preparing the electrode protective sleeve comprises:
- drawing a glass tube with a diameter into the electrode protective outer shell with a tip of a micron diameter;
- and
- filling the tip with silica gel to form a permeable layer;
- wherein the glass tube containing an alkaline solution is sleeved outside the tip to remove impurity gases and allow the phosphine to cross such that the microsensor is selective against the phosphine, insensitive to hydrogen, hydrogen sulfide, methane, and carbon monoxide in soil and sediment environment.
Dependencies are inferred from the claim text.