Results 131 to 140 of about 1,090 (184)

Sorptive sample preparation – a review

Analytical and Bioanalytical Chemistry, 2002
Most sample-enrichment procedures currently available rely on adsorption of the analytes of interest by a suitable adsorbent material. Although good performance can be obtained for many practical problems, in some cases the applicability of adsorptive sample preparation falls short, particularly for the enrichment of polar and/or high-molecular-weight ...
Baltussen, H.A., Cramers, C.A.M.G., Sandra, P.J.F.   +2 more
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The sorptive capacity of animal protein

Environmental Toxicology and Chemistry, 2007
AbstractPartition coefficients that are used to predict concentrations of hydrophobic organic chemicals in biota (e.g., the bioconcentration factor) often assume that the sorptive capacity of an organism or tissue is adequately represented by its lipid content.
Adrian M H, deBruyn, Frank A P C, Gobas
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Transport and separation of proteins by ultrafiltration through sorptive and non-sorptive membranes

Journal of Membrane Science, 1992
Abstract Measurement of transmembrane flux and apparent macrosolute rejection during unstirred ultrafiltration of aqueous solutions of bovine serum albumin (BSA) and myoglobin (MYO) and their mixtures have been measured with non-sorptive (regenerated cellulose) and sorptive (polysulfone) membranes of equally rated “cut-off” (30 kDa) as functions of ...
Shuji Nakatsuka, Alan S. Michaels
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ESTIMATING THE SORPTIVITY OF SOILS

Soil Science, 1981
ABSTRACT Six different approximations of the soil sorptivity were applied to three soils at different initial water contents. Parlange's approximation obtained by optimization was found to give excellent results. A new parameter was found to be quite constant over a range of initial water contents and is useful in estimating the sorptivity for ...
D. E. ELRICK, M. J. ROBIN
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Sorptive Properties of Shungite

Inorganic Materials, 2004
Ion exchange and sorption on shungite are studied. The results demonstrate that this mineral is capable of sorbing both inorganic cations and anions. Cation exchange predominates in alkaline solutions, and anion exchange, in acidified solutions. Organic acids are sorbed substantially better; the sorption of aromatic acids by shungite is selective.
A. S. Shalimov, V. V. Kovalevskii, O. N. Obrezkov, A. B. Yaroslavtsev   +3 more
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Sorptive Stress Estimation: An Important Key to the Mechano-Sorptive Effect in Wood

Mechanics of Time-Dependent Materials, 2000
The mechano-sorptive effect (MSE) can be classified as a veryinteresting, but not yet completely explained phenomenon of woodbehaviour. We therefore decided to try to discover its most relevantmechanisms, by conducting two independent series of measurements:accurate measurements of bending deflections on small, clear specimensof spruce wood in ...
M. Houška, P. Koc
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Sorptivity of dual-permeability soils

2022
<p>Sorptivity is a crucial parameter for modeling water infiltration into soils. Many works have related sorptivity to the soil hydraulic functions, i.e., the water retention and unsaturated hydraulic functions. Parlange's  (1975) formulation is one of the most used to relate sorptivity to the soil hydraulic functions ...
Laurent Lassabatere, Deniz Yilmaz, Simone Di Prima, Majdi Abou Najm, Ryan D. Stewart, Jesús Fernández-Gálvez, Joseph Pollacco, Rafael Angulo-Jaramillo   +7 more
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In-port derivatization after sorptive extractions

Journal of Chromatography A, 2013
Derivatization is necessary when analysis of polar compounds containing hydroxyl, carboxylic acid, amine or thiol functional groups is accomplished by gas chromatography (GC), in order to improve peak symmetry, peak separation and detector response. Derivatization can be performed off-line in a reaction vessel that is separated from the GC analysis ...
E, Bizkarguenaga, A, Iparragirre, P, Navarro, M, Olivares, A, Prieto, A, Vallejo, O, Zuloaga   +6 more
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Dual-phase twisters: A new approach to headspace sorptive extraction and stir bar sorptive extraction

Journal of Chromatography A, 2005
The fields of applicability of headspace sorptive extraction (HSSE) and stir bar sorptive extraction (SBSE) using polydimethylsiloxane (PDMS) as sorbent have been intensively discussed and widely described. One of the limits of sorptive extraction is that PDMS (i.e.
Carlo, Bicchi, Chiara, Cordero, Erica, Liberto, Patrizia, Rubiolo, Barbara, Sgorbini, Frank, David, Pat, Sandra   +6 more
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In situ measurement of sorptivity

Australian Journal of Soil Research, 1969
Measurements of sorptivity are reported for a number of field soils. The main method, used in situ, is simple and consists of timing initial vertical flow of water into an undisturbed soil profile. This method relies on the assumption that, during the measurement time of 1-2 min, the first term of the infiltration equation i = St1/2 + At + Bt3/2 ...
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