Air sampling of N-methylmorpholine on solid sorbent and determination by capillary gas chromatography and a nitrogen-phosphorus detector
A method for sampling and determination of N-methyl-morpholine in workroom air is presented. Sampling was performed on the adsorbent Amberlite XAD-7 at air levels of 2-100 mg/m/sup 3/ methylmorpholine, and desorption was effected by solvent extraction with ethyl acetate. Analysis of the free amine was carried out by means of capillary gas chromatography with flame ionization or nitrogen-phosphorus detection (FID and NPD, respectively). The recovery tests were performed at 20% and 85% relative air humidity, giving recoveries of 90-96% with a relative standard deviation of 2-5%. After 6 weeks of storage in a deep freezer at -20 /sup 0/C, the recovery was even higher than 90%. The gas chromatographic detection limits of methylmorpholine were 0.5 ng (FID) and 0.05 ng (NPD). The method was applied to the polyurethane industry.
- Research Organization:
- National Board of Occupational Safety and Health, Umea, Sweden
- OSTI ID:
- 5698259
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:7; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Evaluation of three sorbents for retention of PCBs in a natural gas stream
Related Subjects
400102* -- Chemical & Spectral Procedures
400105 -- Separation Procedures
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
AIR
AIR SAMPLERS
AMINES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DATA
DESORPTION
ELEMENTS
EQUIPMENT
ETHERS
EXPERIMENTAL DATA
EXTRACTION
FLUIDS
GAS CHROMATOGRAPHY
GASES
HETEROCYCLIC COMPOUNDS
INFORMATION
ION EXCHANGE MATERIALS
MATERIALS
MORPHOLINES
NITROGEN
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC ION EXCHANGERS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PERFORMANCE
PHOSPHORUS
QUANTITATIVE CHEMICAL ANALYSIS
SAMPLERS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TRACE AMOUNTS