Isotope Dilution UPLC-APCI-MS/MS Method for the Quantitative Measurement of Aromatic Diamines in Human Urine: Biomarkers of Diisocyanate Exposure

Details

• Alternative Title:
  Anal Chem
• Personal Author:
  Bhandari, Deepak ; Ruhl, John ; Murphy, Anthony ; McGahee, Ernest ; Chambers, David ; Blount, Benjamin C.
• Description:
  Urinary diamines are biomarkers of diisocyanate exposure. Diisocyanates are considered as skin and respiratory sensitizers and are the most frequently reported cause of occupational asthma. Herein we report on the development and validation of an ultraperformance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method for the measurement of five aromatic diamines, 4,4'-methylenedianiline (MDA), 2,4-toluenediamine (4TDA), 2,6-toluenediamine (6TDA), 1,5-naphthalenediamine (NDA), and p-phenylenediamine (PPDA) in human urine. The method incorporates sample preparation steps, which include a 4 h acid hydrolysis followed by high-throughput solid-phase extraction prior to chromatographic separation. Chromatographic separation was achieved using a C18 reversed phase column with gradient elution of basic mobile phases (pH 9.2). The duty cycle of the method was less than 5 min, including both the column equilibration and autosampler movement. Analytical detection was performed using positive ion atmospheric pressure chemical ionization tandem mass spectrometry (APCI-MS/MS) in scheduled multiple reaction monitoring (sMRM) mode. Excellent linearity was observed over standard calibration curve concentration ranges of 3 orders of magnitude with method detection limit ranging from 10 to 100 pg/mL. The interday and intraday reproducibility and accuracy were within ±15%. This method is fast, accurate, and reproducible and is suitable for assessment of exposure to the most common aromatic diisocyanates within targeted groups as well as larger population studies such as the National Health and Nutrition Examination Survey (NHANES).
• Subjects:
  Aniline Compounds Biomarkers Carbon Isotopes Chromatography, Liquid Diamines Humans Isocyanates Limit Of Detection Naphthalenes Nitrogen Isotopes Su Tandem Mass Spectrometry

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• Source:
  Anal Chem. 88(21):10687-10692.
• Pubmed ID:
  27690384
• Pubmed Central ID:
  PMC5292774
• Document Type:
  Journal Article
• Funding:
  CC999999/Intramural CDC HHS/United States
• Volume:
  88
• Issue:
  21
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:58737f6623c0a6d74a1e8cca6dbd3b0e0efdaa4373ecda560e22dea22470c5e2
• Download URL:
  https://stacks.cdc.gov/view/cdc/44083/cdc_44083_DS1.pdf
• File Type:
  [PDF - 1.23 MB ]