Results 171 to 180 of about 8,462 (221)

Evaluation of electrophysiological responses of bumblebee pollinators to floral scents of oil pumpkin

Barman M, Tenhaken R, Dötterl S.
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Tenax TA extraction to assess the bioavailability of DDTs in cotton field soils

Journal of Hazardous Materials, 2010
The rapid-desorbing fraction plays an important role in the bioavailability of organic pollutants in soil. In the present study, DDT's desorption from the cotton field soils was investigated by Tenax extraction. The results of the Tenax consecutive extraction (400 h) indicated that the rate constants were in the order of 10(-1), 10(-2), and 10(-4) h(-1)
Xinglun, Yang, Fang, Wang, Chenggang, Gu, Xin, Jiang   +3 more
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Retention characteristics of volatile compounds on tenax TA

Journal of High Resolution Chromatography, 1988
AbstractThe chromatographic separation properties of long, thin adsorption tubes enable substance‐specific quantitative enrichment and reduction to be achieved when sampling and thermal desorption are carried out in the same flow direction.The specific retention volumes, and also the breakthrough and peak end volumes, of 69 compounds in the boiling ...
I. Maier, M. Fieber
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Ozone Artifacts and Carbonyl Measurements Using Tenax GR, Tenax TA, Carbopack B, and Carbopack X Adsorbents

Journal of the Air & Waste Management Association, 2006
Four popular thermally desorbable adsorbents used for air sampling (Tenax TA, Tenax GR, Carbopack B, and Carbopack X) are examined for the potential to form artifacts with ozone (O3) at environmental concentrations. The performance of these adsorbents for the ketone and aldehyde species identified as O3-adsorbent artifacts was also characterized ...
Jae Hwan, Lee, Stuart A, Batterman, Chunrong, Jia, Sergei, Chernyak   +3 more
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Comparative assessment of the artefact background on thermal desorption of tenax GC and tenax TA

Journal of Chromatography A, 1986
Abstract The artefact background on thermal desorption of pre-conditioned Tenax GC and Tenax TA is compared. Superior blank gas chromatograms were obtained from Tenax TA, and an efficient pre-conditioning procedure to minimise background on heat desorption is proposed.
Glesni MacLeod, Jennifer M. Ames
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Model-aided characterization of Tenax®-ta for aromatic compound uptake from water

Environmental Toxicology and Chemistry, 2004
Abstract The polymer adsorbent Tenax® has been widely employed for studying desorption of organic contaminants in soils and sediments and for correlating physical availability with bioavailability. Although Tenax has been invoked to act as an infinite sink that completely and instantaneously removes solutes from the aqueous phase, to our
Dongye, Zhao, Joseph J, Pignatello
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Safe Sampling Volume determinations of 12 volatile organic compounds on Carboxen 1003, Carbopack-X & Tenax-TA

Journal of Chromatography A, 2020
Pumped sorbent tube sampling is a well established method for the sampling of volatile organic compounds (VOCs) and semi volatile organic compounds (SVOCs) in ambient, indoor and workplace atmospheres1. Safe sampling volumes and breakthrough volumes have been published for commonly found VOCs on widely used sorbents such as Tenax, however for newer ...
David M, Butterfield, Robert P, Lipscombe, Tom D, Gardiner   +2 more
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Evaluation of Tenax TA thin films as adsorbent material for micro preconcentration applications

Microchemical Journal, 2010
Abstract The purpose of this research was to evaluate Tenax TA in the form of thin films as an adsorbent material for micro preconcentration applications. The micro preconcentrator (μPC) consists of embedded high-aspect-ratio three-dimensional (3D) micro pillars coated with an adsorbent polymer.
Bassam Alfeeli, Larry T. Taylor, Masoud Agah   +2 more
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Decomposition of α-pinene and sabinene on solid sorbents, tenax TA and carboxen

Journal of Chromatography A, 1997
Laboratory experiments were performed to examine potential in situ decomposition of α-pinene and sabinene on Tenax TA and Carboxen. Reactions between monoterpenes and the sorbent surface were observed with sabinene showing lower recoveries than α-pinene. The identified degradation products were monoterpenes and aromatic compounds.
C. Coeur, V. Jacob, I. Denis, P. Foster
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