Sensor membrane for indicating the PH of a sample, the fabrication and use thereof
AssigneeMerck Patent GmbH
InventorOtto S. Wolfbeis
Life of this patent
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Abstract
For the purpose of reversible optical indication of the pH of a sample, a hydrophilic accommodating layer is disposed on a hydrophobic mechanically stable support element, which layer contains the indicator dye proper in an immobilized form. This provides a sensor membrane which can be fabricated in a simple manner and is cost-effective, which has a rapid response time and can also be fabricated as a mass product to be used only once.
Claims10
Sensor membrane for the reversible optical indication of the pH of a sample, having a mechanically stable support element and an indicator dye layer disposed thereon, which comprises a hydrophilic homogeneous, non-fibrous accommodating layer disposed on at least one side of the support element, which layer contains the indicator dye in an immobilized form.
Process for fabricating a sensor membrane for reversible optical indication of the pH of a sample, in which a layer comprising indicator dye is applied onto a mechanically stable support element, wherein a hydrophilic homogeneous, non-fibrous accommodating layer is applied simultaneously with the indicator dye onto the support element, into which layer the indicator dye is introduced and immobilized.
Process for fabricating a sensor membrane for reversible optical indication of the pH of the sample, in which a layer comprising indicator dye is applied onto a mechanically stable support element, wherein a hydrophilic accommodating layer is applied onto the support element following which an indicator dye is introduced into said accommodating layer and immobilized.
Dependencies are inferred from the claim text.