Determination of meta-phenlylenediamine in air by collection on acid-coated silica gel and spectrophotometric measurement as an azo dye derivative
Technical Report
·
OSTI ID:6059300
Meta-phenylenediamine (MPDA), an aromatic-amine curing agent, is one of the volatile components of a heat-cured, epoxy-resin system used in the Y-12 Plant. An analytical procedure was developed for monitoring the MPDA concentration in the work-area atmosphere for employee protection. The MPDA is collected on sulfuric-acid-coated silica gel as a sulfate salt. The MPDA salt is then rinsed from the silica gel with 3.6 N H/sub 2/SO/sub 4/, diazotized with sodium nitrite, and coupled with N-1-naphthylethylenediamine (NEDA) to form an azo dye which is measured spectrophotometrically at 520 nm.
- Research Organization:
- Oak Ridge Y-12 Plant, TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6059300
- Report Number(s):
- Y/DK-231
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
AIR
AIR POLLUTION MONITORS
AMINES
AZO COMPOUNDS
AZO DYES
CURING
DYES
EPOXIDES
FLUIDS
GASES
MAXIMUM PERMISSIBLE DOSE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
SAFETY STANDARDS
SPECTROPHOTOMETRY
STANDARDS
400104* -- Spectral Procedures-- (-1987)
AIR
AIR POLLUTION MONITORS
AMINES
AZO COMPOUNDS
AZO DYES
CURING
DYES
EPOXIDES
FLUIDS
GASES
MAXIMUM PERMISSIBLE DOSE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
SAFETY STANDARDS
SPECTROPHOTOMETRY
STANDARDS