Rapid Elemental Analysis of Aerosols Using Atmospheric Glow Discharge Optical Emission Spectroscopy

Details

• Personal Author:
  Kulkarni P ; Zheng L
• Description:
  A new, low-cost approach based on the application of atmospheric radio frequency glow discharge (rf-GD) optical emission spectroscopy (OES) has been developed for near real-time measurement of multielemental concentration in airborne particulate phase. This method involves deposition of aerosol particles on the tip of a cathode in a coaxial microelectrode system, followed by ablation, atomization, and excitation of the particulate matter using the rf-GD. The resulting atomic emissions are recorded using a spectrometer for elemental identification and quantification. The glow discharge plasma in our system was characterized by measuring spatially resolved gas temperatures (378-1438 K) and electron densities (2-5 × 1014cm-3). Spatial analysis of the spectral features showed that the excitation of the analyte occurred in the region near the collection electrode. The temporal analysis of spectral features in the rf-GD showed that the collected particles were continuously ablated; the time for complete ablation of 193 ng of sucrose particles was found to be approximately 2 s. The system was calibrated using 100 nm particles containing C, Cd, Mn, and Na, respectively. The method provides limits of detection in the range of 0.055-1.0 ng, and a measurement reproducibility of 5-28%. This study demonstrates that the rf-GD can be an excellent excitation source for the development of low-cost hand-held sensors for elemental measurement of aerosols. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Atmosphere Cadmium Chemistry Chemistry, Analytic Manganese Occupational Health Particulate Matter Safety Spectrum Analysis

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• Keywords:
  Aerosol Particles Airborne Particles Analytical Chemistry Analytical Instruments Chemical Analysis Electric Properties Elements Light Emission Measurement Equipment Mobile Equipment Optics Particulates Sensors Sodium Compounds Spectrographic Analysis Spectroscopes Sucrose

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• ISSN:
  0003-2700
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DART - Division of Applied Research and Technology
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  89
• Issue:
  12
• NIOSHTIC Number:
  nn:20050067
• Citation:
  Anal Chem 2017 Jun; 89(12):6551-6558
• Contact Point Address:
  Pramod Kulkarni, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Cincinnati, Ohio 45226, United States
• Email:
  PSKulkarni@cdc.gov
• CAS Registry Number:
  Cadmium (CAS RN 7440-43-9) ; Manganese (CAS RN 7439-96-5) ; Sodium (CAS RN 7440-23-5) ; Sucrose (CAS RN 57-50-1)
• Federal Fiscal Year:
  2017
• NORA Priority Area:
  Manufacturing
• Peer Reviewed:
  True
• Source Full Name:
  Analytical Chemistry
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:403804204067cf4a5dffde19b3d0b4cfee21f035b02e13b2c0b1ced02d68570b8cbb6a32f297e4b7831f7cdf57b58d8ef44bdba47adf1bad81eaa80afebf618c
• Download URL:
  https://stacks.cdc.gov/view/cdc/210584/cdc_210584_DS1.pdf
• File Type:
  [PDF - 1.26 MB ]