Air sampling and analytical procedures for benzidine, 3,3'-dichlorobenzidine and their salts.

Details

• Personal Author:
  Hermes RE ; Morales R ; Rappaport SM
• Description:
  A personal air sampling technique for measuring concentrations of benzidine (92875), 3,3'-dichlorobenzidine (91941), and their salts is described. A glass fiber filter is used to collect the aerosols, and a bed of silica gel is used to collect the vapors. Salts are converted to free amines before analysis, and measurement is performed using high performance liquid chromatography. Air sample temperature and humidity do not affect measurement results. Benzidine and its salts show significant loss when stored for several days before analysis at temperatures above minus 15 degrees- C, but 3,3'-dichlorobenzidine does not reveal loss when stored. The authors conclude that the new sampler is small and easy to use, will collect either physical form (aerosol or vapor) with high efficiency, and should be applicable in all situations. The analytical procedure is quick and provides separation between the test compounds and interfering substances. The authors recommend that benzidine samples be stored cold and tested within a few days to avoid loss. [Description provided by NIOSH]
• Subjects:
  Carcinogens Chemistry Environmental Monitoring Occupational Health Safety
• Keywords:
  Air-sampling-equipment Chemical-analysis Contract-IA-74-35 NIOSH-Contract NIOSH-Publication Personal-exposure-detectors Sampling-devices Sampling-methods
• ISSN:
  0002-8894
• Document Type:
  Text
• Funding:
  Contract
• Genre:
  Journal Article
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  40
• Issue:
  11
• NIOSHTIC Number:
  nn:00091606
• Citation:
  Am Ind Hyg Assoc J 1979 Nov; 40(11):970-978
• CAS Registry Number:
  3,3'-Dichlorobenzidine (CAS RN 91-94-1) ; 4,4'-Diaminodiphenyl (CAS RN 92-87-5)
• Federal Fiscal Year:
  1980
• Peer Reviewed:
  True
• Source Full Name:
  American Industrial Hygiene Association Journal
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9b105224808e5fbee6a1fc72fa86d528e369d51dd7cc0e0c548c7afc4079c302c322561500716f39f5077a783d02921320c9366601aa3af74f2bec2f31b59de8
• Download URL:
  https://stacks.cdc.gov/view/cdc/184275/cdc_184275_DS1.pdf
• File Type:
  [PDF - 782.06 KB ]