Determination method for mono- and diethanolamine in workplace air by high-performance liquid chromatography.

Objectives: The purpose of this research was to develop a simultaneous determination method for monoethanol-amine (MEA) and diethanolamine (DEA) in workplace air for risk assessment.

Methods: The characteristics of the proposed method, such as recovery, quantitation limit, reproducibility and storage stability of the samples, were examined.

Results: An air sampling cassette containing two sulfuric acid-treated glass fiber filters was chosen as the sampler.

Determination method for xylidines in workplace air.

Objectives: The purpose of this research was to develop a determination method for xylidines (XLDs) in workplace air for risk assessment.

Methods: The characteristics of the proposed method, such as recovery, detection limit, reproducibility, and storage stability of the samples were examined.

Results: An air sampler cassette containing two sulfuric acid-treated glass fiber filters was chosen as the sampler.

Correcting diacetyl concentrations from air samples collected with NIOSH method 2557.

Diacetyl (2,3-butanedione), a diketone chemical used to impart a buttery taste in many flavoring mixtures, has been associated with bronchiolitis obliterans in several industrial settings. For workplace evaluations in 2000-2006, National Institute for Occupational Safety and Health (NIOSH) investigators used NIOSH Method 2557, a sampling and analytical method for airborne diacetyl utilizing carbon molecular sieve sorbent tubes. The method was subsequently suspected to progressively underestimate diacetyl concentrations with increasing sampling site humidity.

Validation of analytical methods and instrumentation for beryllium measurement: review and summary of available guides, procedures, and protocols.

This document provides a listing of available sources that can be used to validate analytical methods and/or instrumentation for beryllium determination. A literature review was conducted of available standard methods and publications used for method validation and/or quality control. An annotated listing of the articles, papers, and books reviewed is given in the Appendix.

On wiping the interior walls of 37-mm closed-face cassettes: an OSHA perspective.

As early as 1976, Occupational Safety and Health Administration (OSHA) methods for analyzing metal samples collected using 37-mm polystyrene closed-face cassettes specified that any loose dust be transferred from the cassette to the digestion vessel, that the cassette be rinsed, and that, if necessary, the cassette be wiped out to help ensure that all particles that enter the cassette are included along with the filter as part of the sample for analysis. OSHA analytical methods for metal analysis were recently revised to explicitly require cassette wiping for all metal samples. This change was based on policy that any material entering the collection device constitutes part of the sample and on OSHA Salt Lake Technical Center research showing that invisible residue on the cassette walls can significantly contribute to the total sample results reported.