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Near Real-time, Low-cost, Hand-held Sensors for Measuring Elemental Concentration of Airborne Particles for Indoor or Outdoor Air Quality Monitoring
Case ID:
TAB-3250
Web Published:
12/6/2022
Description:
Airborne particles can have great impact on air quality, weather, and human health. In particular, long-term inhalation of toxic particulate matter in workplaces could pose a significant health risk. NIOSH scientists have developed a new, low-cost approach based on application of atmospheric radio frequency glow discharge (rf-GD) optical emission spectroscopy for near real-time measurement of elemental concentration in aerosols. The method involves collection of aerosol particles on an electrode tip in a coaxial microelectrode system, followed by excitation of the particles using rf-GD. NIOSH scientists identified far less expensive excitation sources for the rf-GD than traditional spark and laser-based excitation sources. Additionally, these excitation sources are compact and can be miniaturized for development of sensors for personal air sampling. The scientists developed a laboratory instrument, calibrated it for various elements including carbon, cadmium, manganese, and sodium, and established analytical detection limits for these elements. They demonstrated that these limits are well below most occupational exposure limits, allowing sensitive near real-time detection. This technology provides an excellent resource for air quality monitoring and the development of low-cost, hand-held sensors for aerosol measurement.
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Direct Link:
https://nih.technologypublisher.com/tech?title=Near_Real-time%2c_Low-cost%2c_ Hand-held_Sensors_for_Measuring_Elemental_Concentration_of_Airborne_Particle s_for_Indoor_or_Outdoor_Air_Quality_Monitoring
Category(s):
Collaboration
Licensing
Diagnostics
Research Materials
Cardiology
Occupational Safety and Health
Vaccines
Endocrinology
Infectious Disease
Dental
Therapeutics
Ophthalmology
Oncology
Consumer Products
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For Information, Contact:
Jeremiah Mitzelfelt
NIH Technology Transfer
301-443-8518
jeremiah.mitzelfelt@nih.gov
Inventors:
Lina Zheng
Pramod Kulkarni
Keywords:
AEROSOLS
analysis
Atmospheric
DART
Discharge
Elemental
Emission
Glow
NIOSH-DART
SPECTROSCOPY
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