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Determination method for xylidines in workplace air.

Akito Takeuchi¹, Shinobu Yamamoto, Warren Hendricks

¹Osaka Occupational Health Service Center, Japan Industrial Safety and Health Association, Japan. a-takeuchi@jisha.or.jp

Journal of Occupational Health

|March 23, 2011

Summary

A new method accurately measures xylidines (XLDs) in workplace air, aiding risk assessment. This validated technique ensures reliable personal exposure monitoring for improved worker safety.

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Area of Science:

Occupational Health
Analytical Chemistry
Environmental Monitoring

Background:

Xylidines (XLDs) are industrial chemicals requiring accurate workplace air monitoring for risk assessment.
Existing methods may lack the sensitivity or practicality for comprehensive exposure evaluation.

Purpose of the Study:

To develop and validate a robust method for determining xylidine levels in occupational air.
To establish a reliable tool for personal exposure monitoring and risk assessment in industrial settings.

Main Methods:

Development of an air sampler using sulfuric acid-treated glass fiber filters.
Extraction and derivatization of XLDs with heptafluorobutyric anhydride.
Analysis using gas chromatography coupled with mass spectrometry (GC-MS).

Main Results:

High average recoveries (83-101%) for personal exposure monitoring.
Excellent storage stability with over 90% recovery after 5 days refrigerated.
Low limit of quantitation (LOQ) of 0.600 µg/sample and good reproducibility (0.8-10.3% RSD).

Conclusions:

The validated method allows for 4-hour personal exposure monitoring of XLDs.
Effective for assessing worker exposure at concentrations relevant to the TLV-TWA.
Provides a valuable tool for occupational risk assessment and management.