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determination by paper chromatography

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Journal Article
Journal: Economic Geology
Published: 01 January 1968
Economic Geology (1968) 63 (1): 76-79.
...J. Plamondon Abstract Concentrations of uranium as low as 1 ppm are determined in soils and sediments by ascending paper chromatography, subsequent to a hot nitric acid attack of the samples. The reagent 1-(2-pyridylazo)-2-napthol (PAN), which is used to develop the chromatograms, is capable...
Journal Article
Journal: Clay Minerals
Published: 01 March 2010
Clay Minerals (2010) 45 (1): 77-86.
...N. Cordeiro; J. Silva; C. Gomes; F. Rocha Abstract The present paper shows the importance of Inverse Gas Chromatography (IGC) for the determination of the surface properties of bentonites. These properties are dispersive surface energy, acid-base properties, surface heterogeneity, sorption...
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Journal Article
Published: 18 October 2019
Geochemistry: Exploration, Environment, Analysis (2019) geochem2019-043.
...Bagai-ool Yu Saryg-ool; I. N. Myagkaya; I. S. Kirichenko; M. A. Gustaytis; O. V. Shuvaeva; S. M. Zhmodik; E. V. Lazareva Abstract The paper presents data on two cores from the dispersion train of gold-bearing sulfide tailings in the Novo-Ursk deposit (Kemerovo region, Russia), where organic-bearing...
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Journal Article
Published: 01 June 2018
American Mineralogist (2018) 103 (6): 899-910.
... electron microscopy (FE-SEM) Jeol 6500F equipped with an energy-dispersive spectrometer (EDS) detector. Trace element concentrations in clinopyroxene were determined by laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) using a 193 nm Resonetics ArF excimer laser coupled...
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Journal Article
Published: 01 June 2015
European Journal of Mineralogy (2015) 27 (3): 417-426.
... of the lines corresponding to m/e = 7. H 2 O was determined by gas chromatography of products of the mineral ignition at 1200°C with a Vario Micro cubeanalyser (Elementar GmbH, Germany). Since measurement of F using EDS is unreliable in such Fe-rich minerals, due to the overlap of F Kα and Fe L...
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Journal Article
Published: 01 August 2014
European Journal of Mineralogy (2014) 26 (4): 589-595.
... of 0.5 M nitric acid was added, and the solution analysed by measuring the intensities of the lines corresponding to m / e = 7 for Li and 9 for Be. The H 2 O content was determined by gas chromatography of products of the mineral ignition at 1200°C. CO 2 was not analyzed because of the absence...
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Journal Article
Published: 01 November 2007
Vadose Zone Journal (2007) 6 (4): 1042-1049.
... used for determination of isotopic ratios for Cs, and Mo. Analysis of the isotopic patterns of Mo, combined with associated chemical data, showed evidence for at least two separate intrusions of nuclear waste into the subsurface. Isotopic data for Cs was inconclusive with respect to a source...
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Journal Article
Published: 01 February 2005
Geochemistry: Exploration, Environment, Analysis (2005) 5 (1): 3-10.
..., has been reported. This paper critically assesses the applicability of Te coprecipitation, ion exchange and mathematical correction for the determination of PGEs in autocatalyst-contaminated environmental samples. Table 2 Multi-element solutions used for recovery and matrix separation...
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Journal Article
Journal: AAPG Bulletin
Published: 01 June 1983
AAPG Bulletin (1983) 67 (6): 932-952.
... hydrocarbon soil gases, measured by flame ionization gas chromatography, are largely determined by the hydrocarbons in nearby underlying reservoirs. By using compositions and ratios of the light hydrocarbons, methane, ethane, propane, and butane, one may predict whether oil or gas is more likely...
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Journal Article
Published: 01 October 2005
Mineralogical Magazine (2005) 69 (5): 677-686.
... determination of methyl tert-butyl ether, tert.-butyl alcohol and BTEX in groundwater at trace level. Journal of Chromatography A , 975 , 113 – 121 . Cassada , D.A. , Zhang , Y. , Snow , D.D. and Spalding , R.F. ( 2000 ) Trace analysis of ethanol, MTBE and related oxygenate...
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Journal Article
Published: 01 July 2001
American Mineralogist (2001) 86 (7-8): 834-851.
... determination, magnetometry, GC) the samples were not ground extensively but were powdered by simple tapping of dry pieces between sheets of wax paper, using a scalpel handle, in order to subject them to the least amount of mechanical treatment. Room temperature ( RT = 22 °C) 57 Fe Mössbauer spectra were...
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Series: GCSSEPM
Published: 01 January 1990
DOI: 10.5724/gcs.90.09.0237
EISBN: 978-1-944966-08-9
... in this paper. Silica-gel chromatography was also carried out on all the whole Caillou Island oils ( C 15− compounds not removed by evaporation) and on 10 unrelated oils from widely-separated geographic localities ( Table 1 ). The nparaffins were removed from the saturated HC fractions by molecular sieves...
Journal Article
Journal: AAPG Bulletin
Published: 01 September 1989
AAPG Bulletin (1989) 73 (9): 1103-1116.
... of Cretaceous stratigraphy discussed in this paper. Top of Mowry Shale is taken as Albian-Cenomanian boundary. Shaded areas represent sandy units. (After Eicher, 1962 ; Gries, 1962 ; Haun and Barlow, 1962 ; Wallem et al, 1981 .) Sedimentological study of the Mowry Shale is based on outcrop...
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Journal Article
Published: 01 January 2013
Reviews in Mineralogy and Geochemistry (2013) 76 (1): 165-218.
... composition (e.g., H 2 S, SO 2 , HCl, HF), the main trend is driven by a combination of the temperature and volatility of the stable solid phase itself, which are the key physical-chemical parameters governing metal transport by volcanic gases, and they determine the so-called “geochemical volatility...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 2005
AAPG Bulletin (2005) 89 (10): 1347-1371.
... of this study is to determine the origin and potential migration pathways for Elk Hills oils, including those produced from the older reservoirs as well as the shallow Pliocene zones. Whether pre-Monterey source units are present in Elk Hills (e.g., Eocene Kreyenhagen or lower Miocene Temblor) is important...
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Journal Article
Published: 01 August 2016
Vadose Zone Journal (2016) 15 (8): vzj2015.12.0168.
... performance was assessed for continuous monitoring of vadose zone gases. This instrument allows unattended concentration measurements of a large number of gas species without any purification. With a detection limit on the order of 10 nL L −1 , it allows determination of trace gases such as Kr and Xe isotopes...
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Journal Article
Published: 01 August 2011
Quarterly Journal of Engineering Geology and Hydrogeology (2011) 44 (3): 345-360.
... of the Oxford Clay liner. Sorption coefficients were reduced in the presence of dissolved organic carbon in leachate, suggesting that published K oc values derived in synthetic groundwater may overestimate the sorption capacity in landfill scenarios. Sorption coefficients and K oc – K ow correlations determined...
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Series: AAPG Hedberg Series
Published: 01 January 2004
DOI: 10.1306/1025686H13112
EISBN: 9781629810461
... mg HC/g TOC. This source rock also contains high amounts of sulfur (3–6% in kerogen). Rock samples and asphaltenes isolated from the oil were analyzed to determine both primary bulk kerogen decomposition and compositional kerogen decomposition products. For the latter, the results include...
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Journal Article
Published: 01 August 2011
Vadose Zone Journal (2011) 10 (3): 867-883.
... of biological activity on mineral weathering and geochemical cycles is still limited. In this paper we provide a description of the Damma Glacier Critical Zone Observatory and present a first synthesis of our multidisciplinary studies of the 150-yr soil chronosequence. The aim of our research was to improve our...
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Journal Article
Journal: Clay Minerals
Published: 01 December 2001
Clay Minerals (2001) 36 (4): 473-481.
...C. MAQUEDA; E. MORILLO Abstract In this paper, the role of Cu in the adsorption of the cationic pesticide chlormequat (CCC) on montmorillonite is studied. The adsorption of CCC was measured in various media, e.g. water and aqueous solutions of NaCl, CaCl 2 and Ca(NO 3 ) 2 at the same ionic strength...
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