Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Measuring Reaction Rates03:09

Measuring Reaction Rates

33.7K
Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical...
33.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Using observations and source specific model tracers to characterize pollutant transport during FRAPPÉ and DISCOVER-AQ.

Journal of geophysical research. Atmospheres : JGR·2020
Same author

Clarifying dairy calf mortality phenotypes through postmortem analysis.

Journal of dairy science·2019
Same author

Short-term methane emissions from 2 dairy farms in California estimated by different measurement techniques and US Environmental Protection Agency inventory methodology: A case study.

Journal of dairy science·2018
Same author

Seasonality of temperate forest photosynthesis and daytime respiration.

Nature·2016
Same author

Response to the Letter on Wormhoudt, J.; Wood, E.; Knighton, W.; Kolb, C.; Herndon, S.; Olaguer, E. 2015. Vehicle emissions of radical precursors and related species observed in the 2009 SHARP campaign; J. Air Waste Manage. Assoc. 65: 699-706.

Journal of the Air & Waste Management Association (1995)·2015
Same author

Vehicle emissions of radical precursors and related species observed in the 2009 SHARP campaign.

Journal of the Air & Waste Management Association (1995)·2015

Related Experiment Video

Updated: Apr 8, 2026

Diffuse Reflectance Infrared Spectroscopic Identification of Dispersant/Particle Bonding Mechanisms in Functional Inks
10:31

Diffuse Reflectance Infrared Spectroscopic Identification of Dispersant/Particle Bonding Mechanisms in Functional Inks

Published on: May 8, 2015

14.3K

New Approaches to Measuring Sticky Molecules: Improvement of Instrumental Response Times Using Active Passivation.

J R Roscioli1, M S Zahniser1, D D Nelson1

  • 1Center for Atmospheric and Environmental Chemistry, Aerodyne Research, Inc. , 45 Manning Road, Billerica, Massachusetts 01821, United States.

The Journal of Physical Chemistry. A
|June 25, 2015
PubMed
Summary

A new method uses continuous passivation with fluorinated surfactants to speed up sampling of sticky molecules like nitric acid (HNO3) and ammonia (NH3). This breakthrough enables faster, more accurate atmospheric measurements for environmental monitoring.

More Related Videos

Surface Passivation for Single-molecule Protein Studies
10:35

Surface Passivation for Single-molecule Protein Studies

Published on: April 24, 2014

43.8K
In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
10:22

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

Published on: June 16, 2014

19.1K

Related Experiment Videos

Last Updated: Apr 8, 2026

Diffuse Reflectance Infrared Spectroscopic Identification of Dispersant/Particle Bonding Mechanisms in Functional Inks
10:31

Diffuse Reflectance Infrared Spectroscopic Identification of Dispersant/Particle Bonding Mechanisms in Functional Inks

Published on: May 8, 2015

14.3K
Surface Passivation for Single-molecule Protein Studies
10:35

Surface Passivation for Single-molecule Protein Studies

Published on: April 24, 2014

43.8K
In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
10:22

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

Published on: June 16, 2014

19.1K

Area of Science:

  • Environmental Chemistry
  • Atmospheric Science
  • Analytical Chemistry

Background:

  • Sampling system surfaces often adsorb "sticky" molecules, leading to slow response times.
  • Historically, accurate real-time measurements of polar molecules like nitric acid (HNO3) and ammonia (NH3) have been challenging.
  • Slow response times hinder the capability of eddy covariance flux and plume-based measurements.

Purpose of the Study:

  • To develop and evaluate a novel method for improving sampling system response times for sticky molecules.
  • To reduce adsorption of HNO3 and NH3 on instrument interfaces.
  • To enable more accurate and faster atmospheric flux measurements.

Main Methods:

  • Implemented active, continuous passivation of instrument interfaces.
  • Utilized fluorinated acidic surfactants (perfluoroheptanoic acid, perfluorobutanesulfonic acid) for HNO3.
  • Employed a fluorinated basic surfactant (1H,1H-perfluorooctylamine) for NH3.
  • Exposed interfaces to 0.01-1 ppm of surfactant vapors.

Main Results:

  • Achieved 75% quantitative recovery of HNO3 in 0.4-0.7 s and 90% in 1-5 s.
  • Obtained <1 s recovery for 75% of NH3 and ~2 s for 90% recovery.
  • Demonstrated utility through field measurements of HNO3 eddy covariance fluxes.

Conclusions:

  • Active, continuous passivation significantly improves sampling system response times for polar molecules.
  • This methodology enhances the capability for real-time atmospheric measurements.
  • Applicable to eddy covariance flux and plume-based studies of challenging atmospheric compounds.