[Determination of benzidine in the air using the colorimetry and liquid chromatography methods]

Area of Science:

• Environmental Chemistry
• Analytical Chemistry

Context:

• Benzidine is a potent carcinogen with a maximum admissible concentration (MAC) of zero in the air.
• Accurate detection of airborne benzidine is crucial for public health and environmental safety.

Purpose:

• To evaluate and compare analytical methods for determining airborne benzidine concentrations.
• To assess the suitability of colorimetric and liquid chromatography methods for benzidine detection.

Summary:

• The colorimetric method using T chloroamine can detect 3 µg/m³ of benzidine and offers specificity and accessible reagents.
• Liquid chromatography provides superior sensitivity (0.7 µg/m³) and precision but requires expensive equipment.
• Both methods are evaluated for their effectiveness in monitoring airborne benzidine levels.

Impact:

• Provides insights into selecting appropriate analytical techniques for airborne carcinogen monitoring.
• Highlights the trade-offs between sensitivity, cost, and accessibility in environmental analysis.
• Contributes to the development of strategies for controlling exposure to hazardous airborne substances.