reference laboratory Articles

  • Is it time to upgrade the PM2.5 federal reference method?

    The fine particulate matter (PM2.5) Federal Reference Method (FRM) has in many respects been a great success. When the method was implemented, there was some doubt that the state and local monitoring agencies that routinely provide air quality data would be able to manage a program, which often distinguishes one location from another by just a few μg/m3. As it turns out, data from the FRM ...

  • Keeping Pace with PTP and CCRL

    Two, three or four times a year, laboratories around the world check their performance with testing programs from ASTM International’s Proficiency Testing Program and the Cement and Concrete Reference Laboratory. Using samples sent for a particular program cycle, labs run specific methods and submit their results to PTP and CCRL for analysis. Each lab then receives reports that serve as a ...


    By ASTM International

  • Determination of PAH in food

    Customer: Food and Feed Governmental lab., France France is divided into administrative regions and each region has its governmental lab. These labs analyze food products to check their compliance with the legal regulations, and to make sure that the products are not hazardous to health. Application: Determination of PAH in food Due to the guidelines ot ...


    By BÜCHI Labortechnik AG

  • Calibration – the sure way to accurate measurements

    Calibration   During testing, microphones and accelerometers can change sensitivity or break. They might look intact, but what happens if you continue measuring without having calibrated your transducer? Can you trust your data? Do you have to redo the entire test? In cases of extreme testing you might only have one shot at getting your measurement right as the product gets ...

  • Performance characterization of the MiniVol PM2.5 Sampler case study

    Measurements were conducted to assess the MiniVol PM2.5 sampler performance for various particle preseparator configurations including flat and cup impaction stages. Laboratory measurements were conducted to determine the impactor collection efficiency as a function of paricle size. Impactor cut points - the aerodynamic particle diameter exhibiting 50% collection efficiency - were 2.5 um (+- 10%) ...


    By Airmetrics

  • Field Dewpoint Measurement - How Good Are We ? - Case Study

    Recently BJ PPS Leeds dried a client system with nitrogen. Dewpoint was measured using a Michell ADM dewpoint meter which was connected to the system at different locations via a one metre long rubber hose. The instrument was allowed to stabilise for approximately five minutes before each reading was taken. Average result was in the region of -27.5 °C. A check of our nitrogen supply and the ...

  • Good practice guide for miniature ETMT tests.

    Abstract: This Good Practice Guide discusses various aspects of testing miniaturised testpieces of representative engineering alloys in the NPL / Instron Electro-Thermal Mechanical Test system (ETMT). Different strain measurement techniques are reviewed including the use of electrical resistance, grip displacement and image correlation. Detailed comments are given in respective ...

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