high-purity reagent Articles

  • o-Phthalaldehyde Reagent

    Introduction Primary amines form highly fluorescent adducts when reacted with o-Phthalaldehyde (OPA) and a mercaptan under basic conditions. At a pH>9 and ambient temperature, reaction is generally complete within 30 seconds. The products of this reaction, 1-alkyl-2-alkylthio-substituted isoindoles, exhibit optimal excitation at 330 nm and maximal emission at 465 nm. The reagents ...


    By Pickering Laboratories, Inc.

  • News on Air 2013, Volume 4: Labware and Reagents

    Welcome to volume 4 of our News on Air bulletin. This edition focusses on some of the labware and reagents that are used in this challenging area of analysis. Success in air monitoring quantitation requires that all the equipment and reagents used are inherently low in background concentrations, to prevent false positives. Commonly used materials may include: Filters, membranes, and ...


    By MilliporeSigma

  • UCT Derivatizing Reagents Cited in ATS Study

    Amphetamines Type Substances (ATS), which include amphetamine (AMP), methamphetamine (MA), 4-methylamphetamine (4-MA), 3,4-methylenedioxyamphetamine (MDA), 3,4-methylenedioxymethamphetamine (MDMA), 3,4-methylenedioxy-N-ethylamphetamine (MDEA), cathinone (CAT), and ephedrine (EPH), are widely acknowledged as common identified drugs of abuse.  Alternative, new-age synthetic cathinones such as ...

  • Microwave and Fenton`s reagent oxidation of wastewater

    Abstract We compared two H 2O 2 oxidation methods for the treatment of industrial wastewater: oxidation using Fenton's reagent [H 2O 2/Fe(II)] and microwave irradiation. Both methods were applied to the treatment of synthetic phenol solutions (100 mg L -1) and of an industrial effluent containing a mixture of ionic and non-ionic surfactants at high load (20 g L -1 of COD). The effects of initial ...


    By Springer

  • Influence of reagent choice on strategies of nutrient recovery by struvite crystallisation

    Two different approaches of magnesium ammonium phosphate (MAP) crystallisation were compared. Anaerobically treated wastewater containing high phosphate levels (100 to 120 mg PO4 3- - P/l) was shown to be treated most efficiently using air stripping combined with MgCl2 and NaOH reagent addition. Residual PO4 3- -P was 8 to 15 mg PO4 3- -P/l yielding 1 to 2,5 mm spherical pure MAP crystals. At ...


  • Improved Catalytic Reagents Reduce Refinery Costs Case Study

    Documento sin título ARI-100 ...


    By Merichem Company

  • Treatment of oil–water emulsion from the machinery industry by Fenton's reagent

    An oil–water emulsion from the machinery industry was treated using Fenton's reagent. The objective was to reduce the high chemical oxygen demand (COD) of this waste stream so that it would meet the COD effluent limit of Chinese Standard JS-7740-95. The optimal [H2O2]/[Fe2+] ratio for COD removal was 3. An orthogonal experimental design was developed ...


    By IWA Publishing

  • High Quality Moisture Analysis for High Value Resins

    Whether you’re making syringes or turkey basters, pacemakers or milk jugs, maintaining the correct moisture content in your resins is essential to your production process. Join us February 9-11 in Anaheim, CA at Plastec West / MD&M West, booth 3920, and see why our instruments are considered the leaders in moisture analysis for the medical device ...


    By Arizona Instrument LLC

  • High-temperature air pollution control technology

    Based on 35 years’ experience working for the environment, French company Maguin has developed the Cercat filter for high temperature air pollution control. David Gambier describes the technology and its potential use in the glassmaking industry.Maguin has been present in the waste thermal treatment field since the 1970s, offering customers innovative and state-of-the-art concepts. The company’s ...

  • ´High-Resolution Characterization in Fractured Rock´

    Ken Goldstein, CGWP moderated a session titled “High-Resolution Characterization in Fractured Rock” at the 2017 NGWA Conference on Fractured Rock and Groundwater, October 2-3 in Burlington, Vermont. Goldstein is senior vice president, water and environmental systems at Louis Berger. He recently shared his insights with us on fractured rock characterization and what he is looking ...

  • High range chlorine testing – what are the options?

    Higher range chlorine solutions are typically used for disinfecting products but standard chlorine meters often cannot measure to higher ranges. For example the Hach Pocket Colorimeter II for chlorine measures to a maximum of 2mg/L, and the ...


    By Camlab Limited

  • New technologies for processing high sulphur oil shales and producing highly priced thiophenes

    A technology for processing the light fraction of high sulphur oil shale pyrolysis tar is suggested. The technology allows some industrial hydrocarbon solvents, chemical reagents and sulphur-organic products (for example, thiophene, methyl- and dimethilthiophenes), which are used in organic synthesis, to be obtained and the production of different medical preparations etc.Keywords: Oil shale, ...


    By Inderscience Publishers

  • A method of high sensitivity and in situ determination of trace cobalt(II) in water samples with salicyl fluorone

    Based on the sensitive reaction of Co(II) and salicyl fluorone with the presence of cetylpyridinium bromide in basic solution, a new method of flow injection micelle-solubilized spectrophotometry was developed for the determination of cobalt. The reaction was monitored for the absorbance of Co(II) at 540 nm. The reagents, flow injection variables and effects of foreign ions were investigated and ...


    By IWA Publishing

  • FePt and CoPt magnetic nanoparticles film for future high density data storage media

    Controlled self-assembly of magnetic L10 FePt and CoPt nanoparticles has stimulated great interest recently and may serve as future ultrahigh-density data storage media. This article reviews chemical synthesis of self-assembled FePtCu nanoparticles film and fabrication of CoPt/C and FePt/C granular thin films by sputtering. Their novel structural characterisation and unique magnetic ...


    By Inderscience Publishers

  • Preparation of composite coagulant of PFM-PDMDAAC and its coagulation performance in treatment of landfill leachate

    A novel inorganic–organic composite coagulant, poly-ferric-magnesium (PFM) polydimethyldiallylammonium chloride (PDMDAAC), was prepared using FeSO4, MgSO4 and PDMDAAC as raw materials and was introduced to treat landfill leachate. The coagulation performance of the new reagent was evaluated and compared with those of other coagulants. The new reagent was characterized in terms of ...


    By IWA Publishing

  • Analysis of Trace Elements in Water by EPA Method 200.8 using ICP Mass Spectrometry

    This application note describes the methodology and use of the Shimadzu ICPMS-2030 ICP mass spectrometer for the analysis of trace elements in drinking and fresh waters following the EPA 200.8 method. This method is also used for analysis of wastewater. In-line addition of internal standards to calibration and unknown samples was accomplished using the Shimadzu Internal Standard Addition ...

  • Amino acid analysis matrix independent analysis of free amino acids

    Pickering Laboratories specializes in manufacturing of cationexchange columns and eluants for amino acid analysis. No other techniques have been shown to match the reproducibility and sensitivity of this post-column methodology. Advantages of this method, such as absence of matrix interferences, are especially important in analysis of native samples. Pickering provides several options for the ...


    By Pickering Laboratories, Inc.

  • Comparison of the CMVX-7100 Micro-Volume Workstation

    Comparison of the CETAC MVX-7100 Micro-Volume Workstation with an Established Laboratory Method for the Assessment of Lead, Mercury, and Arsenic in Human Whole Blood. Conventional autosamplers used in clinical ICP-MS are largely based on the needs of non-clinical environments. Their disadvantages are numerous and include high ...


    By Teledyne CETAC Technologies

  • Case study - Hydraulic slurry emplacement of potassium permanganate and zero valent iron for integrated site remediation

    Site Description: An active electronic manufacturing facility had an on-site TCE handling unit that was active for 10 years. During this time, approximately 1,365 gallons of solvent was released, which created an approximate 16 acre plume in saprolite and bedrock. Contaminants: Primarily TCE at concentrations greater than 200,000 ug/L in the source area with ...

  • Ultrasonication boots heterogeneous reactions

    Chemical reactions require the interaction of the reactant molecules. For heterogeneous or multi-phase reaction and catalysis the interaction is limited to the contact surface of the dispensed reactant. Therefore, the phase boundary is a rate determining factor. Ultrasonic cavitational mixing is an effective means to increase the ...

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