Abstract
A confirmation method for the determination of 18 aromatic amines originating from azo dyes after reductive cleavage was developed. The method is based on the use of high-performance liquid chromatography/tandem mass spectrometry with atmospheric-pressure chemical ionization. For the identification of the analytes one precursor ion and two daughter ions (multi-reaction monitoring, MRM) were selected and the LC-MS/MS parameters optimized to obtain high sensitivity and selectivity. The linear ranges varied from 0.1–1 to 30–50 μg mL−1 with correlation coefficients of 0.99 or better. The applicability of the method to determine o-tolidine (3,3′-dimethylbenzidine) and 3,3′-dimethoxybenzidine in textiles following reductive cleavage of acid red 114, trypan blue, and Chicago sky blue 6B was demonstrated.
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The financial support from the Postgraduate Education and Research Program in Chemistry (PERCH), Royal Golden Jubilee Program and from the Alexander von Humboldt Stiftung are gratefully acknowledged.
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Sutthivaiyakit, P., Achatz, S., Lintelmann, J. et al. LC-MS/MS method for the confirmatory determination of aromatic amines and its application in textile analysis. Anal Bioanal Chem 381, 268–276 (2005). https://doi.org/10.1007/s00216-004-2852-2
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DOI: https://doi.org/10.1007/s00216-004-2852-2