What is pH indicator paper?
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pH indicator paper is a type of paper that is used to determine the pH level of a solution. It is made by immobilizing certain substances on filter paper that undergo a color change in response to different pH values. These substances, known as indicators, can be natural compounds such as turmeric extract or anthocyanin from purple rice bran , or synthetic compounds like fluorescein mono-acrylate . The indicator paper can be used to rapidly monitor the pH of various liquids, including food . The color change of the indicator paper is dependent on the pH of the solution, and different colors correspond to different pH values. The pH indicator paper can be used as a low-cost and highly sensitive method for pH sensing . It can be applied in various fields, including food quality monitoring , environmental analysis , and chemical reactions .
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| Papers (5) | Insight |
|---|---|
Patent 13 Oct 2016 3 Citations | The paper does not explicitly define what pH indicator paper is. The paper is about a pH sensor using colorimetry, which includes indicators that induce a color change in a pH range of 0 to 14. |
6 Citations | pH indicator paper is a type of paper that contains embedded Au nanoparticles and is used in combination with Surface Enhanced Raman Scattering (SERS) to directly measure the pH of microdroplets. |
4 Citations | The provided paper does not explicitly mention "pH indicator paper." |
01 Mar 2021 1 Citations | The paper describes the development of a paper-based pH indicator using anthocyanin from purple rice bran for rapid food quality monitoring. The pH indicator paper changes color in response to different pH levels in liquid foods. |
| The paper does not provide a specific definition of pH indicator paper. |
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