Determining the pH of sol-gel matrix by α-naphtholphthalein (CAT#: STEM-PPA-0058-LJX)

Introduction

This service considers the nature of interactions between the sol gel derived inorganic matrix and α‐naphtholphthalein pH‐indicator, the method is based on the physical entrapment of the indicator molecules in sol gel matrix, the immobilized α‐naphtholphthalein pH‐indicator shows similar behavior as its solution counterpart.

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Principle Applications Procedure Materials Notes Related Products

Principle

Acid-base indicators produce different colors in aqueous solutions of their specific pH range. The indicator is added to the standard buffer solution, and the resulting color is used as the standard colorimetric tube. The pH value of the water sample can be measured by visual colorimetric comparison with the water sample colorimetric tube with the same indicator.

Applications

For determining the approximate PH value of solutions in food production, wastewater treatment, pharmaceutical and chemical industries

Procedure

1. Add ph indicator to the standard solution, and the solution with different pH will show different colors. Use these solutions as standard colorimetric tubes
2. Add the same ph indicator to the solution to be tested, and compare the color of the solution to be tested with the standard colorimetric tube to determine the approximate ph value of the solution

Materials

• Sample Type:
Sol-gel matrix

Notes

After dropping the indicator into the solution, it should be gently shaken to avoid inaccurate detection.

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