thermal sample preparation Articles

  • Morphology and reactivity of aluminium nanocrystalline powders

    Aluminium powders obtained by mechanical milling are characterised in terms of morphology, nanostructure and thermal properties. Platelets like particles with a thickness in the micrometre range are obtained. It is shown that these platelets are constituted of many nanocrystallites whose size governs the melting behaviour of the powders. Their reactivity towards oxygen is compared with that of ...


    By Inderscience Publishers

  • An overview of post-column derivatization methods from a pharmaceutical applications perspective

    High performance liquid chromatography (HPLC) is the technique of choice for separating analytes pursuant to their detection, identification, quantification and/or purification. Most organic substances, and certainly the majority of pharmaceuticals, are polar, nonvolatile or thermally labile molecules that are amenable to HPLC separation. Moreover, the availability of a large variety of LC column ...


    By Pickering Laboratories, Inc.

  • Preconcentration of Cu (II) from seawater using a novel and stable phenol–formaldehyde resin

    Preconcentration of Cu (II) from seawater using a novel phenol–formaldehyde (P–F) resin was investigated. 1,2-dihydroxybenzene-4-azo-3-hydroxybenzene-formaldehyde resin (DAHBF) was prepared by condensing 1,2-dihydroxybenzene-4-azo-3-hydroxybenzene with formaldehyde (1:2 mole ratio) in the presence of oxalic acid as catalyst. Polychelates were obtained when the DAHBF was treated with the aqueous ...


    By IWA Publishing

  • Utilization of kaolin processing waste for the production of porous ceramic bodies

    The kaolin processing industry generates large amounts of waste in producing countries such as Brazil. The aim of this study was to characterize kaolin processing waste and evaluate its suitability as an alternative ceramic raw material for the production of porous technical ceramic bodies. The waste material was physically and chemically characterized and its thermal behaviour is described. ...


    By SAGE Publications

  • Case study: Hunters Point

    In Situ Thermal Remediation with Gas Thermal Remediation (GTR©) is being used to remove NAPL contaminants from a former military base. The system is extracting nearly 1,000 liters of liquid waster every week. LNAPLs, such as fuel and oils, and DNAPLs, such as PCBs and chlorinated solvent, are being removed from the subsurface to make way for a residential homes. In Situ+NAPL ...

  • Discrimination of higher plant calluses based on embryogenic capacity and taxonomic classification by pyrolysis mass spectrometry

    Pyrolysis mass spectrometry (PyMS) is a rapid, simple, high-resolution analytical method based on thermal degradation of complex material in a vacuum, and has been widely applied to the discrimination of closely related microbial strains. Minimally prepared samples of embryogenic and non-embryogenic calluses derived from various higher plants (sweet potato, morning glory, Korean ginseng, Siberian ...


    By Springer

  • Determining pesticides in dietary supplements with QuEChERS extraction, cartridge SPE, and GCxGC-TOFMS

    Regulatory requirements are driving the development of new multiresidue pesticide methods for dietary supplements. Minimizing matrix interference is critical for data accuracy. The novel approach employed here combines QuEChERS extraction, cartridge SPE cleanup, and GCxGC-TOFMS analysis, and results in good recoveries across a range of compounds found in these complex matrices. ...


    By Restek Corporation

  • Mass balance and mass loading of polybrominated diphenyl ethers (PBDEs) in a tertiary wastewater treatment plant using SBSE-TD-GC/MS

    A mass loading and mass balance analysis was performed on selected polybromodiphenyl ethers (PBDEs) in the first full-scale indirect potable reuse treatment plant in the United States. Chemical analysis of PBDEs was performed using an environmentally friendly sample preparation technique, called stir-bar sorptive extraction (SBSE), coupled with thermal desorption and gas chromatography/mass ...


    By IWA Publishing

  • Synthesis of nano grade ?–ferric oxide and evaluation of its catalytic properties

    Ferric oxide is a well–known catalyst for the thermal decomposition of ammonium perchlorate and hence it is extensively used as ballistic modifier for ammonium perchlorate based composite solid propellants. The particle size of conventional propellant grade ferric oxide was reduced to nano levels by continuous ball milling using a planetary ball mill employing zircon balls in isopropyl alcohol. ...


    By Inderscience Publishers

  • VOC control efficiency compliance test case study

    Skyworks Solutions, Inc. (Skyworks) selected CK to perform a compliance emissions testing program to determine the control efficiency of a new Roto-Concentrator followed by a thermal oxidizer (RC/TOx) used to control volatile organic compounds/hazardous air pollutants (VOC/HAP) from multiple manufacturing processes. A facility air permit condition required compliance testing of the subject RC/TOx ...


    By CK Environmental, Inc.

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