Determination method for p-Phenylazoaniline and 2-methyl-4-(2-tolylazo)aniline in workplace air by high-performance liquid chromatography.

Objectives: The purpose of this research was to develop a method for the simultaneous determination of p-Phenylazoaniline (also called 4-aminoazobenzene, AAB) and 2-methyl-4-(2-tolylazo)aniline (also called o-aminoazotoluene, AAT) in workplace air for risk assessment.

Methods: The characteristics of the proposed method, such as recovery, limit of quantitation, 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 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.