Development of a novel optical sensing method for acid solution using Oil Red O supported by florisil

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Developing sensitive and selective sensors for acid detection is crucial for environmental and industrial monitoring.
• Existing methods for acid sensing may lack sensitivity or require complex instrumentation.

Purpose of the Study:

• To develop a novel field sensing method for concentrated acid solutions using a dye-supported material.
• To investigate the role of the support material in the sensing mechanism.

Main Methods:

• A sensor was constructed using Oil Red O dye immobilized on a florisil support.
• The color change properties of the dye-florisil system were evaluated in the presence of acid solutions.
• Silica gel was used as a control support material for comparison.

Main Results:

• The Oil Red O dye supported on florisil exhibited significantly altered color change properties in acid solutions compared to the dye in solution.
• The sensor demonstrated applicability for sensing acids at relatively low concentrations.
• No similar phenomenon was observed when silica gel was used as the support, highlighting florisil's importance.
• The amount of dye absorbed on the florisil surface correlated with the observed color change.

Conclusions:

• Florisil plays a critical role in the enhanced color change phenomenon of Oil Red O dye for acid sensing.
• The developed dye-florisil sensor offers a promising approach for detecting low-concentration acid solutions.
• Further research into dye-support interactions can lead to improved sensor designs.