sample preparator Articles

  • Sample preparation for the analysis of matured timber

    The matured timber statute dedicates itself with the utilization and application of matured timber. A perfect assistant for the sample preparation are the FRITSCH Cutting Mills.  It especially includes rules concerning analysis for the examination of matured timber in regards to heavy metals (lead, cadmium, chromium etc.), arsenic, as well as PCP and PCB (pentachlorophenol and ...


    By Fritsch Milling and Sizing

  • Aflatoxin & ochratoxin sample preparation columns

    Simultaneous Analysis of Aflatoxins and Ochratoxin A - Sample Preparation Aflatoxins and Ochratoxin A are produced by fungi, e.g. Aspergillus and Penicillium species. Therefore both toxin types are found together in many foods and animal feeds, e.g. cereals. Thus it is appropriate to analyze one extract for the occurrence of both mycotoxins in a single step. A significant assistance ...


    By Pickering Laboratories, Inc.

  • Sample Preparation for Refuse Derived Fuels

    Plastic, wood and shredded waste, are in times of rising crude oil prices very interesting additions to the classic fuels. Especially in the cement industry, the energy rich fractions from conditioning processes are readily burned along. Important here is the analytical evaluation of the materials. Refuse derived fuels: Plastic, wood and shredded waste: Here are some examples of more or less well ...


    By Fritsch Milling and Sizing

  • Sample preparation for the analysis of secondary fuel in cement plants

    Secondary fuel can be a very inhomogeneous sample, containing all types of polymers, paper, wood and low fractions of metal. Also recycled wood or parts of automobile tires might be used as secondary fuel. Before using it as fuel in the production of cement, several chemical analyses are necessary as quality control. Cement is made by heating limestone (calcium carbonate), with small quantities ...


    By Fritsch Milling and Sizing

  • Sample Preparation of Glass and Ceramic Materials for Atomic Absorption Analysis

    The analysis of silicate-based glass and ceramics has always been a moderately difficult job, since the components that comprise the glass are usually not stable together in solution. For example, most typical acidic digestions that solubilize silicon will cause calcium fluoride to precipitate. If no fluoride is present, the silicon will not be fully decomposed, and if the solution is heated, ...


    By Buck Scientific Inc

  • The Preparation of Hollow Cylinder Specimens from Undisturbed Tube Samples of Soft Clay

    The use of torsional-hollow cylinder testing apparatus for research into soil stress-strain behavior has grown over the past decade. Most studies have focused on sands or on cohesive materials reconstituted in the laboratory. Studies involving undisturbed soft clay have been neglected, in part due to the difficulties involved in specimen preparation.The present paper describes a procedure for the ...


    By ASTM International

  • Sample preparation and analytical techniques for determination of polyaromatic hydrocarbons in soils

    Polyaromatic Hydrocarbons (PAHs) have been determined in soil samples for many years. PAHs can arise in the environment from natural sources, oil and petroleum products and combustion processes. Although oil spills influence PAHS concentrations in local areas, the major sources of PAHS are anthropogenic and derived from land based combustion sources. PAHs are globally distributed and the highest ...

  • PPCPs: Preparing for an uncertain regulatory future

    A recent study published in Environmental Pollution* identified 56 active pharmaceutical ingredients (APIs) in effluent samples from 50 large wastewater treatment plants across the U.S. Among the products found in samples were commonly prescribed anti-psychotic and antihypertensive drugs. As more studies continue to fuel public concerns over risks to public health and the environment, wastewater ...

  • Method Scaling in Preparative HPLC: Analytical Method & Preparative Method

    VOC:  “I tried to scale up my analytical HPLC method to prep and it didn’t work.” Andy:  This is one of the most common things we hear from chemists wanting to do preparative chromatography. We also hear the following question pretty often too: VOC:  “I have a good analytical HPLC method, how do I scale it to ...


    By Waters Corporation

  • Characterization of Polymer Carbon Sieves, Graphitized Polymer Carbons and Graphitized Carbon Blacks for Sample Preparation Applications

    The use of carbons in sample preparation techniques such as solid phase extraction (SPE) and air sampling has been ongoing for several decades. Recent advancements in sample preparation techniques have led to the use of carbons in micro-SPE (i.e., pipette tips packed with particles), solid phase microextraction (SPME) techniques and carbon coatings for both gas and liquid sample preparation ...


    By MilliporeSigma

  • Dialysis with a semipermeable membrane – a new sample-preparation technique for determination of Polybrominated Diphenyl ethers in fatty matrices

    Summary Dialysis with a low-density polyethylene semipermeable membrane (SPM) is an efficient means of removal of lipids in the determination of bioaccumulative, persistent, halogenated organic compounds. In this study an SPM was used for preconcentration of polybrominated diphenyl ethers (PBDE) from food samples. The method is useful for determination of PBDE and other halogenated ...


    By Exposmeter AB

  • Leader in sample preparation systems benefits from Axetris MFCs’ high dynamic range - Case Study

    Split ratio flexibility of GC injector increased 30-fold A leading manufacturer of analytical sample preparation systems in gas chromatography (GC) switched to Axetris MFCs - and in doing so, simplified their product range, while offering their customers at least 30 times more flexibility in split ratio. The market-leading dynamic range of Axetris mass flow controllers (MFCs)—with ...


    By Axetris Ag

  • The Universal Sampling Accessory

    Infrared Spectroscopy (IR) is one of the most descriptive “tools” available to the analytical organic chemist both for qualitative identification and quantitative determination of single and mixed components. Classically, most samples have been prepared for scanning by transmission, where the thickness becomes a very critical factor in the quality of the final spectrum. If the sample is too ...


    By Buck Scientific Inc

  • Preparation and characterisation of silver doped ZnO nanostructures

    ZnO was prepared by hydrothermal method. The result of scanning electron microscopy showed that the materials had nanorod structures. Ag–doped ZnO was prepared by UV–photoreduction respectively. Crystalline phases and optical absorption of the prepared samples were determined by X–ray diffraction, Raman spectrum and UV–visible spectrophotometer. X–ray analyses reveals that Ag doped ZnO ...


    By Inderscience Publishers

  • Preparing for EPA’s mandatory reporting of greenhouse gases rule

    Recent action by the US EPA to finalize the Mandatory Reporting of Greenhouse Gases (GHG) Rule means that environmental managers must now seriously examine whether they are fully prepared to address the imminent requirements. This article provides some assistance by summarizing key points regarding the final versus proposed rule, providing clarification on key questions that have arisen since the ...


    By Trinity Consultants

  • Sample extraction kit user’s guide

    Intended Use This extraction kit is for use with the appropriate immunoassay test kit. Each Sample Extraction kit contains the materials necessary to process twelve (12) soil or wipe samples. Test Principles The reagents contained in the Sample Extraction kit have been optimized for fast, efficient removal of compounds from soil or surfaces and convenient ...


  • Stabilization of Liquefiable Samples During Transport

    This technical note presents a new method to transport liquefiable soils from the investigation site to the laboratory. The development of this method resulted from research on liquefiable soils from the Imperial Valley, CA. This method is based upon the application of a slight vacuum on the pore water of the soil. The vacuum decreases the pore pressure, and therefore increases the effective ...


    By ASTM International

  • Preparation of thiabendazole standards for use in applications of the benomyl/carbendazim rapid assay

    GENERAL COMMENTS: This procedure describes the preparation of thiabendazole (TBZ) standards used in applications of the Benomyl/Carbendazim RaPID Assay. Standard concentrations of 10, 50 and 250 ng/mL (ppb) TBZ and a control concentration of 100 ppb TBZ are prepared by making appropriate dilutions of a concentrated TBZ solution in the Benomyl/Carbendazim Sample Diluent. The standards and ...


  • Low temperature preparation of NaTi2(PO4)3 by sol-gel method

    Bulk and nano sized rhombohedral NaTi2(PO4)3 belonging to NASICON family have been prepared by sol-gel method at low temperatures. The products are characterised by powder X-ray diffraction, Raman, SEM and TEM methods. The phase formation of NaTi2(PO4)3 was started at 550°C. The crystallite sizes of NaTi2(PO4)3 prepared at 550°C and 600°C were found to be 35 nm and 37 nm respectively. ...


    By Inderscience Publishers

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