lc/ms service Articles

  • USLC columns put the right tools in your LC method development toolbox

    Understanding Selectivity in Reversed Phase Separations – A Simplified Approach to HPLC and UHPLC Column Selection The most significant influence on chromatographic peak separation, or resolution, is column selectivity. Unfortunately, column selectivity is also the least understood and most underutilized parameter. To improve selectivity, method developers often concentrate on ...


    By Restek Corporation

  • Overview of Rotating Disc Electrode (RDE) Optical Emission Spectroscopy for In-Service Oil Analysis

    Introduction The basis of modern oil analysis is the use of optical emission spectroscopy (OES) to measure the ppm (parts per million) levels of wear metals, contaminants and additives in oil samples. Whatever else an oil lab may measure, a multi-elemental analysis is the core of in-service oil analysis. This paper gives an overview of Rotating Disc Electrode Elemental Spectroscopy and its ...


    By Spectro Scientific

  • Changing the Rules with Mass Detection

    How simplified detectors can provide mass data for every analytical run and speed up method development With access to multiple mass spectrometry systems of varying degrees of sophistication, Davy Guillarme (University of Geneva, Switzerland) wasn’t actively looking for new mass detection solutions. Nevertheless, the Waters ACQUITY QDa mass detector caught his eye. Why? Because it opens a ...


    By Waters Corporation

  • Mass Spectrometry Makes Cents for UC San Diego Clinical Laboratory

    “Fast is fine; but accuracy is everything.” The quote is attributed to the famous Wyatt Earp, a sharpshooter and lawman who, with help from his two brothers, sent three outlaws to their graves in the Gunfight at the O.K. Corral in Tombstone, Arizona in 1881. One hundred ...


    By Waters Corporation

  • Analytical Testing for Corexit Dispersants Used in the Gulf Spill

    The analysis of various sample matrices (seawater, sediment, tissue) to determine concentrations of Corexit dispersants used in the Gulf spill requires the use of one or more of the components in the dispersant as a tracer. The primary active ingredient (i.e. the primary surfactant) in the Corexit products is Dioctyl Sulfosuccinate Sodium Salt (DOSS). The other primary ingredients function as ...


  • How Water Treatment Plants Protect Fish from Disruptive Synthetic Hormones

    Scottish Water provides 1.34 billion liters of drinking water every day and takes away 847 million liters of waste water daily. Answerable to both the Scottish Parliament and the people of Scotland, Scottish Water recognizes that innovation is a key enabler for them to deliver sustainable, high-quality water treatment services. One of the many compounds they ...


    By Waters Corporation

  • How a contract research lab advanced its polymer characterization capabilities

    Realizing the Advantages of Ultra-High-Performance Size Exclusion Chromatography Compared to GPC Intertek is a global provider of quality and safety services designed to help businesses improve products, assets and processes, overcome market constraints and reduce risks. From auditing and inspection, to testing, training, and certification, Intertek enables customers to meet end ...


    By Waters Corporation

  • Binary vs. Quaternary Gradients: Precision vs. Accuracy

    In the last blog post I talked about how a gradient is formed by the two different pumps.  Today, we will look at the ability for those pumps to deliver the actual gradient that a scientist requests as well as how precise that delivery is. Before we do that, let’s take a step back and remind everyone the difference ...


    By Waters Corporation

  • Denver Colorado - Harvard Gultch Interceptor - Case Study

    Summary Pipe penetrating radar (PPR), a new pipe inspection technology was used for condition assessment in a 27 inch interceptor in Denver, CO. Metro Wastewater Reclamation District (MWRD), the owner of the interceptor had limited information about the condition of the pipe, so they contacted SewerVUE in order to undertake a multisensory pipe condition assessment that included CCTV, PPR ...


    By SewerVUE

  • Food security: Facts and figures

    Food security is deeply connected to other development challenges and poor health. Michael Hoevel traces the links. Food security addresses one of humankind’s most fundamental needs — access to a nutritious and adequate diet. It is also seen ...


    By SciDev.Net

  • US plant shutdowns, grid focus drive storage growth: Greensmith CEO

    Power plant closures and hiking transmission costs are driving up US utilities’ investment in renewable energy storage, John Jung, CEO of Greensmith, an energy storage services firm, told Wind Energy Update. Some 60 GW of US coal-fired capacity is set to close between 2012 and 2020, according to the EIA. Nuclear plant lifespans will end and the US plans $180bn in planned transmission ...

  • Oil Sampling Best Practices (Part 2)

    Understanding Dynamic Particle Equilibrium in Closed Loop Systems Dynamic Equilibrium Condition (DEC) is defined as a steady state condition where the normal wear rate in a machine results in no net gain or loss of particles. ...


    By Spectro Scientific

  • This Isn’t Just A Job, This is Our Future

    In his recent remarks at the National Clean Energy Summit, President Obama pointed out that last year “the solar industry added jobs 10 times faster than the rest of the economy” (see White House fact sheet) while noting the essential role solar plays in our ...


    By Institut für Solartechnik

  • 10 Questions to Compare Energy Management Software [Checklist]

    Have you seen our latest guide on selecting the right energy management software? If you’re trying to decide on the best solution for your ESCO or attempting to compare energy management software vendors in a rush, we summed up the main questions you need to ask your potential provider in a handy and printable checklist. 10 Essential Questions to Compare Energy Management Software ...


    By DEXMA

  • Churchill Downs Louisville, Kentucky - Case Study

    Key Parameters Type of Facility - Existing (EB) Function - Sports, Hospitality Area - 404,000 sf, 6-stories Project Completed - 2007 Challenge: IAQ for patron comfort and effective filtration. A primary objective in the six-story expansion was the ability to handle larger crowds at a variety of events; from races to ...

  • Carroll County Jail Huntingdon, Tennessee - Case Study

    Key Parameters Type of Facility -Government (NC) Function - Correctional Facility Area - 22,335 square feet Cost - $8.2 million Project Completed - 2014 Challenge: Energy savings and code compliance. Carroll County officials wanted the new facility, designed for 176 low and medium security inmates, to be cost ...

  • Dana-Farber Cancer Institute Boston, MA - Case Study

    Key Parameters Type of Facility – Existing Building Function – Laboratory & Offices Area – 100,000+ sf Project Completed – 2012 LEED Registered - LEED-CI v2009 Challenge: Sustainable design. Dana-Farber Cancer Institute (DFCI) is a principal teaching affiliate of the Harvard Medical ...

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