Porous chemical indicator for gaseous media
A chemical indicator and indicator technology, which is applied in the field of porous chemical indicators for gas media, and can solve problems such as being unsuitable for detection
Inactive Publication Date: 2017-08-18
3M INNOVATIVE PROPERTIES CO
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- Summary
- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
Techniques suitable for detecting acids or bases in liquids are not suitable for detecting acids or bases in gaseous media
Method used
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Experimental program
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Embodiment 2
[0056] Embodiment 2 is the chemical indicator of embodiment 1, wherein the inert porous substrate comprises a microporous substrate wherein substantially all of the pores are less than 1,000 microns in diameter.
Embodiment 3
[0057] Embodiment 3 is the chemical indicator of embodiment 2, wherein substantially all of the pores have a diameter of 1-500 microns.
Embodiment 4
[0058] Embodiment 4 is the chemical indicator of embodiment 2, wherein substantially all of the pores are 1-100 microns in diameter.
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Abstract
Chemical indicators for acidic or basic gases include an inert, porous substrate, an indicator dye or mixture of dyes contained within at least some of the pores of the inert, porous substrate, and an inert adhesive layer attached to the inert, porous substrate. The porous substrate may be a microporous substrate.
Description
[0001] This patent application is a divisional application of the patent application with the application number 201180044074.X, the application date is September 15, 2011, and the invention title is "porous chemical indicator for gas medium". technical field [0002] The present disclosure pertains to chemical indicators for acidic or basic gases, devices employing such indicators and methods of making chemical indicators for acidic or basic gases. Background technique [0003] A variety of techniques are used to detect the presence of acids, acids, bases, and basics in liquids. For example, electronic devices such as pH meters may be used, or chemical detection techniques such as litmus paper may be used. [0004] Detection of the presence of acids or bases in gases is more difficult and is becoming increasingly important. In a variety of work environments and other environments, acidic or alkaline gases may be present, and their presence may be hazardous to those environ...
Claims
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IPC IPC(8): G01N31/22G01N21/78
CPCA61B10/0045G01N21/783G01N31/22G01N31/221G01N2021/773G01N2021/7796Y10T156/10G01N21/78A61B17/083A61B17/085B01L2200/16B01L2300/044B01L2300/046G01N2001/028G01N2035/00108G01N2035/00148
Inventor 约翰·克里斯托弗·托马斯尼尔·A·拉科杜安·D·范斯勒
Owner 3M INNOVATIVE PROPERTIES CO