A novel fluorescent distinguished probe for Cr (VI) in aqueous solution

Area of Science:

• Analytical Chemistry
• Environmental Science
• Materials Science

Background:

• Chromate (CrO4(2-)) is a toxic environmental pollutant requiring sensitive detection methods.
• Existing detection techniques may lack selectivity or sensitivity for trace levels of Cr(VI).
• Development of novel probes is crucial for accurate environmental monitoring.

Purpose of the Study:

• To develop a novel spectrofluorimetric probe for selective and sensitive CrO(4)(2-) detection.
• To investigate the reaction mechanism between the probe and CrO(4)(2-) under acidic conditions.
• To validate the probe's efficacy in real-world water samples.

Main Methods:

• Synthesis and characterization of salicylaldehyde rhodamine B hydrazone (SRBH).
• Spectrofluorimetric analysis of SRBH's reaction with CrO(4)(2-) in acidic media.
• Optimization of reaction conditions including pH and probe concentration.
• Validation of the method using drinking water, river water, and synthetic samples.

Main Results:

• SRBH acts as a selective and sensitive probe for CrO(4)(2-) detection via fluorescence enhancement.
• A linear relationship was observed between fluorescence intensity and CrO(4)(2-) concentration (1.0 x 10(-8) to 3.0 x 10(-7)M).
• The method achieved a low detection limit of 1.5 x 10(-9)M with good precision (R.S.D. = 2.0%).

Conclusions:

• The developed SRBH probe offers a robust and reliable method for Cr(VI) determination.
• The probe's high sensitivity and selectivity make it suitable for environmental water analysis.
• This approach provides a valuable tool for monitoring Cr(VI) pollution.