Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Rida Al-Horr"'
Autor:
Noreen D. Poor, Carlo Amalfitano, S M Rahmat Ullah, Scott W. Campbell, Rida Al-Horr, Purnendu K. Dasgupta, Jianzhong Li
Publikováno v:
Atmospheric Environment. 41:4242-4257
Equilibrium modeling predicts that atmospheric sea salt can partition gas-phase HNO3 to solid- or aqueous-phase NaNO3. One month of semi-continuous and simultaneous measurements of particulate chloride and nitrate and gaseous HCl and HNO3 concentrati
Publikováno v:
Atmospheric Environment. 41:4258-4269
Oxalic acid is the dominant dicarboxylic acid (DCA), and it constitutes up to 50% of total atmospheric DCAs, especially in non-urban and marine atmospheres. A significant amount of particulate H 2 Ox/oxalate (Ox) occurred in the coarse particle fract
Autor:
Brett D. Grover, Jeremy S. Richards, S M Rahmat Ullah, Michael Kleinman, Delbert J. Eatough, Cory Carter, Rida Al-Horr, Purnendu K. Dasgupta, Norman L. Eatough
Publikováno v:
Aerosol Science and Technology. 40:941-951
Under the EPA Science to Achieve Results (STAR) and the Environmental Monitoring for Public Access and Community Tracking (EMPACT) programs an intensive sampling campaign was performed during the month of August 2002 at the state of Utah Air Quality
Measurement of Both Nonvolatile and Semi-Volatile Fractions of Fine Particulate Matter in Fresno, CA
Autor:
Douglas W. Later, Delbert J. Eatough, M. Meyer, Judith C. Chow, Jeffrey L. Ambs, Philip K. Hopke, Rida Al-Horr, John G. Watson, Brett D. Grover, Norman L. Eatough, William E. Wilson
Publikováno v:
Aerosol Science and Technology. 40:811-826
An intensive sampling campaign was performed in Fresno, CA during December 2003 measuring fine particulate matter including both the semi-volatile and nonvolatile fractions of the aerosol. Both the newly developed R&P FDMS Monitor and a PC-BOSS have
Autor:
William F Smith, Rida Al-Horr, Zhang Genfa, Purnendu K. Dasgupta, C.Bradley Boring, Michael W. Martin
Publikováno v:
Analytical Chemistry. 74:1256-1268
We present a new fully automated instrument for the measurement of acid gases and soluble anionic constituents of atmospheric particulate matter. The instrument operates in two independent parallel channels. In one channel, a wet denuder collects sol
Publikováno v:
Analytical Chemistry. 73:4694-4703
An improved method that uses sequential suppressed and nonsuppressed IC for the sensitive detection of both common anions and very weak acid anions is described. After suppressed conductometric detection of an electrolytically generated hydroxide elu
Autor:
Purnendu K. Dasgupta, Zhang Genfa, Jianzhong Li, C. Bradley Boring, Sivakumar Jambunathan, Rida Al-Horr
Publikováno v:
Analytical Chemistry. 71:1400-1407
A new fluoropolymer tube is proposed as the basis of a novel class of liquid core waveguide-based luminescence detectors. Both chemiluminescence and photoluminescence detectors are possible. In the latter case, illumination is transverse to the main
Autor:
Rida Al-Horr, Purnendu K. Dasgupta, Rosanne W. Slingsby, Daniel W. Armstrong, Jared L. Anderson, P. Kalyani Martinelango
Publikováno v:
Analytical chemistry. 77(15)
Perchlorate (ClO4-) competitively inhibits the uptake of iodide by the thyroid gland. Trace quantities of perchlorate are being increasingly detected in food and environmental samples. There is great concern that perchlorate contamination may be far
Autor:
Rida Al-Horr, Roel Gronheid
Publikováno v:
Optical Microlithography XVIII.
In this paper, a technique for in-line monitoring of acid and base contamination is described. The technique is applied to purge gas monitoring and the air at the in- and outlet of the active charcoal filters on an ASML PAS5500/1100 193nm scanner is
Publikováno v:
Environmental sciencetechnology. 37(24)
A new continuous soluble particle collector (PC) that does not use steam is described. Preceded by a denuder and interfaced with an ion chromatograph, this compact collector (3 in. o.d., approximately 5 in. total height) permits collection and contin