pH sensor for indicating the pH of a sample
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United States of America Patent
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May 13, 2003
Grant Date -
N/A
app pub date -
Aug 12, 1999
filing date -
Aug 12, 1999
priority date (Note) -
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Abstract
A pH sensor for the visual or optical indication of the pH of a sample. The pH sensor includes a hydrophilic, optionally intrinsically charged or neutral, synthetic membrane and at least one pH indicator dye immobilized thereto, so as to prevent appreciated bleeding of the at least one indicator dye from the synthetic membrane upon immersion in an aqueous liquid.
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