[Toxicokinetic exposure tests for chromium].

Area of Science:

• Occupational Health
• Environmental Toxicology
• Analytical Chemistry

Background:

• Hexavalent chromium exposure poses significant health risks, including toxicity, carcinogenicity, and allergic reactions.
• Monitoring occupational chromium exposure is crucial for worker safety and health surveillance.
• Biological monitoring provides a direct measure of internal dose and health effects.

Purpose of the Study:

• To evaluate the accuracy and applicability of biological tests for assessing occupational chromium exposure.
• To establish dose-effect relationships between chromium exposure and biological markers.
• To recommend biological exposure indices for workplace monitoring.

Main Methods:

• Analysis of chromium concentrations in urine (CrY), erythrocytes (CrE), and nails (CrH) from 151 exposed and control individuals.
• Statistical assessment of the correlation between exposure levels and biomarker concentrations.
• Comparison of biomarker data with established occupational exposure limits.

Main Results:

• Urinary chromium (CrY) is a suitable indicator for recent exposure.
• Nail chromium (CrH) effectively detects both increased exposure and deficiency.
• Established dose-effect relationships allowed for the recommendation of biological maximum allowable concentrations (BMAC).

Conclusions:

• Biological monitoring using CrY, CrE, and CrH is effective for evaluating occupational chromium exposure.
• Recommended BMAC values for CrY (2.3 µg/l), CrE (3.6 µg/l), and CrH (2.2 µg/g) aid in workplace health surveillance.
• Accurate assessment of chromium exposure through biological tests supports preventative occupational health strategies.