·ATP-enhanced PB@MIL-100(Fe) nanozyme enables dual-mode ratiometric colorimetric and smartphone-based hydrogel detection of nitrite in food samples

Key Points

• Nitrite detection achieved through ratiometric colorimetric methods, enabling precise measurement.
• Key measurement showed a significant color change with varying nitrite concentrations, enhancing detection capabilities.
• Innovation employs a novel nanzyme design combined with ATP to facilitate rapid, smartphone-compatible detection.
• Findings support the potential for on-site food safety assessments using colorimetric techniques in diverse settings.