Water Sampling Articles

  • Webinar Highlights: Microfluidics for macromolecules

    Hi, I’m Jim Murphy, Principal Consulting Chemist at Waters, and I recently collaborated with Lucinda (Cohen) Hittle to present an exciting webinar on the use of microflow chromatography for macromolecules.  Lucinda, a Director of Discovery Bioanalytics at Merck, presented an overview of the use of LC-MS for peptide analysis along with various case studies for in vitro and in vivo ...


    By Waters Corporation

  • Analysis of PeCOD Technology and Comparison to Dichromate Method

    Abstract The main objective of this report was to determine if a correlation exists between peCOD technology and the dichromate method of estimating Chemical Oxygen Demand (COD). Additional investigations described in this report were: to identify whether particle size in water samples affects the estimate of COD obtained by peCOD analysis and, to identify whether peCOD analysis is ...


    By MANTECH INC.

  • On-site Oil Analysis to extend oil drain intervals

    Fleets demonstrate ROI on do it yourself oil analysis “If the oil is good, why would you change it?” Gary Lentsch, CAFM, fleet manager for Eugene Water & Electric Board (EWEB), asked ...


    By Spectro Scientific

  • New MANTECH Turbidity Flow Cell and Method - Case Study

    Man-Tech’s Turbidity Flow Cell and Method only requires calibrations every 1-3 months. Man-Tech’s automated turbidity has many benefits that make it work well: the sample is mixed to ensure homogeneity, excellent and stable calibrations, easy to add additional parameters including pH, conductivity, alkalinity, colour, and flouride, among other reasons. Why does ...


    By MANTECH INC.

  • Fast, Sensitive, and Cost-effective ICPE Spectrometry Analysis of Trace Metals in Water by EPA Method 200.7

    Introduction The Shimadzu ICPE-9820 multi-type ICP atomic emission spectrometer is the ideal instrument for running EPA Method 200.7. The ICPE-9820 permits simultaneous analysis of all elements, at all wavelengths, allowing high-throughput analysis with little need for dilution. The large 1-inch CCD detector with over 1 million pixels measures 110,000 wavelengths. Overflow channels ...

  • What Centrifuge Is Best For You?

    With the largest portfolio of centrifuges in the UK, it can be difficult to decide which one is right for you. Fortunately Centurion Scientific is here to help; here is a helpful checklist to help you decide which of our products is best for you. The Centurion Checklist This checklist fundamentally consists of with three basic questions in order to help you ...


    By Centurion Scientific Ltd

  • Amthor International Tanker Truck

    If you need a tanker truck, then you’ll have a large selection of different types of tanker trucks to choose here at Amthor International. We are a fourth generation company that can meet your tanker truck needs no matter what they are. Not only do we have floor models of our many different tank trucks available, we also offer pre-owned units and can customize tanker trucks to your unique ...


    By Amthor International

  • Waters and BioanalysisZone are Highlighting our Bioanalytical Chemists

    Like the black panther, are analytical scientists going extinct? In a presidential election year, we are reminded of the many tough choices we face—Democrats or Republicans, plastic or paper, ketchup or mustard, soccer or football. And as we watched the Olympic track and field events, for instance, we saw the margin between first and last become more narrow with each ...


    By Waters Corporation

  • What’s a Luminometer? And Why Should You Care?

    If you’re in the business of managing a water system – whether drinking water, wastewater or water used for industrial purposes – a luminometer can make your job easier. Luminometers have been used in labs for decades, helping to provide easily interpreted answers to molecular questions. The ...


    By LuminUltra Technologies Ltd.

  • Case study - Investigation of leachate from landfill using integrated sampling

    Project reference Project: Pilot project in Ersmarksdeponin landfill in Umeå county Customer: Umeå county, Sweden Project period 1999 Nature of task: Development of new monitoring strategy for landfill: Time integrated monitoring of ...


    By Exposmeter AB

  • Case study - Investigations of PAH pollution in stormwater stream TVARAN

    Project reference Project: Pilot project in Umeå city (Sweden) Customer: Umeå county, Sweden Project period 2001-2002 Nature of task: Determination of bioacumulative PAH pollution profile in Tvärån stormwater stream ...


    By Exposmeter AB

  • Fabrication of polysiloxane-modified polyurethane sponge as low-cost organics/water separation and selective absorption material

    Through sol-gel and dip-coating processes, commercial polyurethane sponge modified by polysiloxane was fabricated under low temperature (60 °C) and atmosphere. The contact angle of the obtained polysiloxane/polyurethane sponge is 145 ± 5°. Hence, the polysiloxane/polyurethane sponge could float on water and selectively absorb organics from the surface of the water, indicating simultaneous ...


    By IWA Publishing

  • Impact of pH on Derivatization of Nitrophenol Compounds

    Our goal of evaluating the Normalized French Environmental Method 12673 required testing the method’s ability to derivatize nitrophenols and alkylphenols in addition to the chlorophenols the method was designed for. Unfortunately, nitrophenols proved challenging to derivatize at low concentrations. In an effort to improve the derivatization of nitrophenols, we experimented with the pH of ...


    By Restek Corporation

  • What is microflow?

    What are the differences between micro-scale and conventional LC? Microflow (aka micro-scale) LC/MS has been widely applied to proteomic research for years.  Recently, as microflow LCMS systems continue to evolve, more and more laboratories in various fields are weighing the implications of applying this small-is-beautiful technology. In this and my next two blog posts, ...


    By Waters Corporation

  • Spatial and seasonal variation of organic pollutants in surface water using multivariate statistical techniques

    In this study, analysis of variance (ANOVA), cluster analysis (CA) and principal component analysis (PCA) were employed in order to evaluate the concentration profile of organic contaminants found in three main river from central Transylvania, Romania. Samples were collected from nine sampling stations, in two different sampling campaigns (wet season and dry season). Water samples were ...


    By IWA Publishing

  • Inter-laboratory validation of automated SPME-GC/MS for determination of pesticides in surface and ground water samples: sensitive and green alternative to liquid–liquid extraction

    An automated solid-phase microextraction gas chromatography/mass spectometry (SPME-GC/MS) method was developed for the determination of semi-volatile pesticides from several classes with a wide range of polarities in an environmental matrix, and validated according to the rigorous standards of a large commercial laboratory reporting data requiring regulatory acceptance with the purpose of ...


    By IWA Publishing

  • Things You Should Know about Your Reusable Water Bottle

    Reusable water bottles are everywhere; on office desks, in gym bags, and in kids’ backpacks. And while it’s inexpensive, environmentally friendly, and incredibly convenient to stop by any tap or fountain for a quick refill, there are a few things to remember about these reusable bottles. Actually, there are a few things to remember about microorganisms: many of them love warmth, ...

  • New Automation Guide for Improved Titration Workflows

    Find valuable tips and tricks on how to optimize your titration workflows in the new METTLER TOLEDO Automation Guide. Download the Titration Automation Guide today and learn how titration processes can be automated for highest efficiency and security in the laboratory. Modern laboratories look into automation to address the demands for high throughput and variety of samples and workflows. ...


    By Mettler - Toledo Int. Inc

  • Binary vs. Quaternary Pumps: High Pressure Mixing vs. Low Pressure Mixing

    Welcome to the next installment in my series on binary vs. quaternary pumps for liquid chromatography! In my previous post, I discussed how gradients are created as well as the importance of having accuracy and precision in your gradient. ...


    By Waters Corporation

  • New indices for reliability assessment of water distribution networks

    This paper presents new indices to evaluate the reliability of water distribution networks (WDNs) usable in the design, planning and management of these networks. Since the pressure-driven analysis (PDA) of WDNs produces more accurate results than the demand-driven analysis, the new indices are proposed based on the PDA. In the proposed measures, nodal pressures, nodal available discharges and ...


    By IWA Publishing

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