New analytical method for determining formaldehyde in aqueous samples

Details

• Personal Author:
  Que Hee-S ; Tso-JC
• Description:
  Carbonyl compounds (especially low molecular weight aldehydes) are receiving increasing attention in workplace air exposures and water pollution. Formaldehyde, acetaldehyde, furfural, and crotonaldehyde are known animal carcinogens. There is a need to have a method that can be utilized to analyze trace amounts of aldehydes, particularly in groundwater from hazardous waste sites and waste streams after oxidation or combustion treatments. The reagent 0-(2,3,4,5,6-pentafluorophenyl) methylhydroxylamine hydrochloride (PFBHA) is a promising reagent to analyze carbonyl compounds. A batch method to form derivatives is the only method type for aqueous samples; however, it is time-consuming. A new analytical method with solid phase extraction has been developed by using a cation exchange cartridge to hold PFBHA ions to react with aldehyde in the aqueous sample. The cation exchange cartridge was activated by 10 mL of 0.5 M sulfuric acid and charged with 10 mL of 1 % (w Iv) PFBHA aqueous solution at a flow rate of 0.5 mL/min. After loading aldehyde aqueous samples and a microwave heating treatment, the oxime product was eluted from the SCX cartridge by 5 mL of hexane and analyzed qualitatively and quantitatively by gas chromatography/ electron capture detection and gas chromatography/ mass spectrometry using a nonpolar capillary column. The capacity of PFBHA in the SCX cartridge was 80 mmole/0.38 g (210 mmole/g sorbent). The recoveries of formaldehyde in the concentration range 3B30 ppm were >83%. This method is suitable for field sampling. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Air Pollution, Indoor Carcinogens Chromatography Environmental Monitoring Laboratories Occupational Health Particulate Matter Safety Water Purification
• Keywords:
  Air-contamination Air-monitoring Air-quality-measurement Air-samplers Air-samples Air-sampling Air-sampling-equipment Air-sampling-techniques Airborne-particles Chromatographic-analysis Exposure-assessment Exposure-levels Gas-chromatography Laboratory-testing Mathematical-models Quantitative-analysis Sampling-methods Standards Water-analysis Water-industry Water-sampling

  More +
• Publisher:
  American Industrial Hygiene Association
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Abstract or Summary
• Place as Subject:
  California ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  15
• NIOSHTIC Number:
  nn:20039214
• Citation:
  American Industrial Hygiene Conference and Exposition, May 9-15, 1998, Atlanta, Georgia. Fairfax, VA: American Industrial Hygiene Association, 1998 May; :15
• Federal Fiscal Year:
  1998
• NORA Priority Area:
  Research Tools and Approaches: Exposure Assessment Methods
• Performing Organization:
  University of California Los Angeles, Los Angeles, CA
• Peer Reviewed:
  False
• Start Date:
  19950901
• Source Full Name:
  American Industrial Hygiene Conference and Exposition, May 9-15, 1998, Atlanta, Georgia
• End Date:
  19990831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:8c546ec35a7ce93f3ff6d9189594d4d94522763c2bd902e25b586fc1a5d3a5778b93693d8a070f5d130e42a981982ee039e1bab348c78f8390c97d498727283b
• Download URL:
  https://stacks.cdc.gov/view/cdc/192642/cdc_192642_DS1.pdf
• File Type:
  [PDF - 756.28 KB ]