Determination of sub-part-per-million levels of formaldehyde in air using active or passive sampling on 2,4-dinitrophenylhydrazine-coated glass fiber filters and high-performance liquid chromatography
Formaldehyde is sampled from air with the use of a standard miniature glass fiber filter impregnated with 2,4-dinitrophenylhydrazine and phosphoric acid. The formaldehyde hydrazone is desorbed from the filter with acetonitrile and determined by high-performance liquid chromatography using UV detection at 365 nm. Recovery of gas-phase-generated formaldehyde as hydrazone from a 13-mm impregnated filter is 80-100% in the range 0.3-30 ..mu..g of formaldehyde. This corresponds to 0.1-10 mg/m/sup 3/ in a 3-L air sample. When the filter sampling system is used in the active mode, air can be sampled at a rate of up to 1 L/min, affording an overall sensitivity of about 1 ..mu..g/m/sup 3/ based on a 60-L air sample. Results are given from measurements of formaldehyde in indoor air. The DNP-coated filters were also evaluated for passive sampling. In this case 37-mm standard glass fibers were used and the sampling rate was 55-65 mL/min in two types of dosimeters. The diffusion samplers are especially useful for personal exposure monitoring in the work environment. 24 references, 2 figures, 4 tables.
- Research Organization:
- National Board of Occupational Safety and Health, Umeae, Sweden
- OSTI ID:
- 5414160
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 57:6; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
Similar Records
2,4 - dinitrophenylhydrazine - coated silica gel cartridge method for determination of formaldehyde in air: Identification of an ozone interference
Measurement of indoor formaldehyde concentrations with a passive sampler
Related Subjects
400102* -- Chemical & Spectral Procedures
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR
AIR FILTERS
AIR POLLUTION MONITORS
AIR SAMPLERS
ALDEHYDES
AROMATICS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DATA
DINITROPHENOL
EQUIPMENT
EXPERIMENTAL DATA
FILTERS
FILTRATION
FLUIDS
FORMALDEHYDE
GASES
GLASS
HYDRAZINE
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ACIDS
LIQUID COLUMN CHROMATOGRAPHY
MEASURING INSTRUMENTS
MONITORS
NITRO COMPOUNDS
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PERFORMANCE
PHENOLS
PHOSPHORIC ACID
POLLUTION CONTROL EQUIPMENT
QUANTITATIVE CHEMICAL ANALYSIS
SAMPLERS
SENSITIVITY
SEPARATION PROCESSES
TRACE AMOUNTS