Fading of organic artists' colorants by atmospheric nitric acid: reaction products and mechanisms
Article Abstract:
A study was conducted to identify the reaction products that form when artists' colorants are exposed to gas-phase nitric acid. The reaction products of nine colorants were studied by using chemical ionization mass spectrometry. The chloride cationic dye basic fuchsin and the carbinol pararosaniline were the most nitric acid-fugitive colorants. Both of these were derivatives of triphenylmethane. The remaining colorants produced small amounts of oxidation. These results can be applied to the analysis of the effect of atmospheric nitric acid on museum collections.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1992
User Contributions:
Comment about this article or add new information about this topic:
Fate of atmospheric particles within the Buddhist cave temples at Yungang, China
Article Abstract:
The dynamic of air circulation in the Yungang Grottoes at Yungang, China was analyzed to determine the effects of air-borne pollutants and particle deposition due to extensive coal mining near the surrounding areas. The 12-month monitoring program indicated the presence of high concentrations of airborne particles. Furthermore, the pollutants are composed mainly of soil dust and carbon-containing particles that are deposited by natural convection inside the caves.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
Hydrofluoric acid in the Southern California atmosphere
Article Abstract:
An eight-month long air monitoring experiment to measure atmospheric hydrofluoric acid in Southern California yielded a long-term average HF concentration between 0.13 microgram/cu.m to 0.22 microgram/cu.m. Of the nine air monotoring sites, two showed significant abrupt rises in HF concentrations, which was surmised to come from an accidental discharge of HF by industrial sources. HF concentration was collected through the tandem filter method.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Modeling the atmospheric concentrations of individual gas-phase and particle-phase organic compounds. Evolution of atmospheric particles along trajectories crossing the Los Angeles basin
- Abstracts: Sorbent organic domains: discovery of a humic acid glass transition and an argument for a polymer-based model
- Abstracts: Laser mass spectrometric analysis of organic atmosphere aerosols. 2. Elucidation of urban air pollution processes
- Abstracts: Use of UV spectroscopy to characterize the reaction between NOM and free chlorine. Solubilization rates of n-alkanes in micellar solutions of nonionic surfactants
- Abstracts: Modified anisotropic Gurson yield criterion for porous ductile sheet metals. Stress-based forming limits in sheet-metal forming