New constraints on isotopic effects and major sources of nitrate in atmospheric particulates by combining δ15N and Δ17O signatures

2021 ◽  
Author(s):  
Wei Song ◽  
Xue‐Yan Liu ◽  
Cong‐Qiang Liu
Keyword(s):  
Atmospheric Particulates ◽  
Isotopic Effects

ISOTOPIC EFFECTS IN XPS SPECTRA OF H2O AND D2O

1987 ◽  
Vol 48 (C9) ◽  
pp. C9-789-C9-792 ◽  
Author(s):  
D. NORDFORS ◽  
S. SVENSSON ◽  
U. GELIUS
Keyword(s):  
Xps Spectra ◽  
Isotopic Effects

Forest vegetation as a sink for atmospheric particulates: Quantitative studies in rain and dry deposition

1981 ◽  
Vol 86 (C6) ◽  
pp. 5347 ◽  
Author(s):  
Irving J. Russell ◽  
Carl E. Choquette ◽  
Shih-Lieh Fang ◽  
William P. Dundulis ◽  
Andrew A. Pao ◽  
...  
Keyword(s):  
Dry Deposition ◽  
Forest Vegetation ◽  
Atmospheric Particulates ◽  
Quantitative Studies

Untersuchung von Calciumisotopieeffekten bei heterogenen Austauschgleichgewichten / Investigation of Isotopic Effects of Calcium in Heterogeneous Exchange Equilibria

1972 ◽  
Vol 27 (2) ◽  
pp. 126-133 ◽  
Author(s):  
Klaus Gustav Heumann ◽  
Karl Heinrich Lieser
Keyword(s):  
Separation Factor ◽  
Calcium Concentration ◽  
Isotopic Fractionation ◽  
Ion Source ◽  
Isotopic Effect ◽  
Mass Unit ◽  
Calcium Isotopes ◽  
Heterogeneous Exchange ◽  
Loaded Column ◽  
Isotopic Effects

The following heterogeneous exchange equilibria have been examined for isotopic effects: CaCO3/Ca(aq.)2⊕. Ca-GBHA/Ca(aq.)2⊕ and Ca(Dowex 50)2⊕/Ca(aq.)2⊕ (GBHA = glyoxal-bis (2-hydroxyanil)). The isotopic ratios 44Ca/40Ca and 48Ca/40Ca were determined by means of a mass spectrometer with a thermal ion source. In the system CaCO3/Ca(aq.)2⊕, the elementary separation factor was found to be less than 1‰ or 0,5‰ per mass unit, respectively.For the exchange in the system Ca-GBHA/Ca(aq.)2⊕ in the concentration range from 0.011 to 0.84 M an elementary separation factor less than 1‰ per mass unit was found; from a three-stage experiment at a calcium concentration of 1.23 M it was concluded that the elementary isotopic effect is less than 0.4‰ per mass unit. Therefore no isotopic fractionation is to be expected for precipitation of inorganic or organic calcium salts.An enrichment of the heavier calcium isotopes in the solution was found in the case of the exchange in a Dowex 50-X12 loaded column. The isotopic effect depends on the concentration of the hydrochloric acid used as the eluent.

Sign in / Sign up

Export Citation Format

Share Document