Proficiency Testing Articles

  • Stainless Steel CNC Machining Service

    Stainless steel CNC machining service materials Stainless steels are often referred to as problem materials in the field of machining. Above all, the great toughness of stainless steels and their tendency to stick is causing difficulties for many users. Stainless steels, for example, are increasingly prone to build-up ...

  • Oil and grease in waste water

    Determination of oil and grease in waste water according to Standard Methods AWWA 5520 This Application Note describes the extraction and determination of oil and grease from waste water samples following Standard Methods 5520 part D (Soxhlet Extraction Method). “Oil and grease” is defined as any material recovered as a substance soluble in the solvent. Therefore, compounds ...


    By BÜCHI Labortechnik AG

  • All about the Qualtrax User Conference with Amy Ankrum

    It began in 2005 and 12 years later we are still going strong. The first Qualtrax User Conference was born from the idea that if we could get our customers together with our team, our product, and each other, we would be able to create increased proficiency within our customer base. We also know that ...


    By Qualtrax Inc

  • Utilizing Restek reference standards for residual solvent testing

    Restek manufactures several different residual solvent standards.  These can be used for testing according to USP, the EP monograph, or other residual solvent assays, such as medical cannabis testing.   The calculations involved for the use of these standards has led to questions for our technical team.  This post should help provide guidance for their usage.  I’ll ...


    By Restek Corporation

  • New to ISO/IEC 17025 Accreditation or Accreditation in General?

    In a recent issue of Cal Lab: The International Journal of Metrology, ANAB’s Roger Muse provides a nice description of the ISO/IEC 17025 accreditation process. As Muse begins, “To the uninitiated, accreditation to ISO/IEC 17025 can seem mysterious, confusing, or ...


    By Qualtrax Inc

  • 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 ...

  • Distribution and extraction of chromium from phosphate ore

    Phosphate rocks are a vital and non-renewable resource which is crucial for agricultural uses. However, this raw material contains various contaminants such as Pb, Cr, Cu, Ni and Zn. Among these elements, chromium is considered as an essential micronutrient at low intake levels. Its occurrence in industrial products at higher concentration can cause a potential risk to plants, animals and ...


    By IWA Publishing

  • Measurements of nanomaterials in environmentally‐relevant water matrices using liquid nebulization / differential mobility (LN/DMA) analysis

    A liquid nebulization‐differential mobility analysis (LN/DMA) methodology was evaluated for the measurement of the size distribution and quantitative mass concentration of nanomaterials in environmentally relevant aqueous media. The analysis time is 8 min, the method requires little routine sample preparation and less than 8 mL of sample. The method can be used for rapid, direct analysis of ...


    By John Wiley & Sons, Ltd.

  • News on Food 2013, Volume 2: Simplify Sample Prep, and Increase Speed and Sensitivity

    Analytical testing is used 1) to determine nutritional value and quality and 2) to ensure food safety and security. We have developed and continue to develop, specialized products that allow food analysts to simplify sample prep, and increase speed and sensitivity for many food and beverage applications. In this second issue of “News On Food”, we will focus on our continuously ...


    By MilliporeSigma

  • Effect of gold nanoparticles and ciprofloxacin on microbial catabolism: A community‐based approach

    The effect of gold nanoparticles (AuNPs) and ciprofloxacin on the catabolism of microbial communities was assessed. This was accomplished through an ex‐situ methodology designed to give a priori knowledge on the potential for NPs, or other emerging contaminants, to affect the catabolic capabilities of microbial communities in the environment. Microbial communities from a variety of sources ...


    By John Wiley & Sons, Ltd.

  • 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

  • Extension of the constrained ant colony optimization algorithms for the optimal operation of multi-reservoir systems

    This paper extends the application of Constrained Ant Colony Optimization Algorithms (CACOAs) to optimal operation of multi-reservoir systems. Three different formulations of the constrained Ant Colony Optimization (ACO) are outlined here using Max-Min Ant System for the solution of multi-reservoir operation problems. In the first two versions, called Partially Constrained ACO algorithms, the ...


    By IWA Publishing

  • 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

  • Practical Advice for Product Steward Professionals on Remaining Competent, Socially Aware, and Scientifically Proficient

    Consumer product manufacturers are challenged today as never before. Materials selection for consumer products invites a dizzying range of considerations: Are the chemicals hormone disruptors, carcinogens, or persistent, bioaccumulative, or toxic? What toxicogenomic biomarkers might make the product the next celebrity tort case? What labeling requirements apply? What are the implications of ...


    By Bergeson & Campbell, P.C.

  • Practical Advice for Product Steward Professionals on Remaining Competent, Socially Aware, and Scientifically Proficient

    Consumer product manufacturers are challenged today as never before. Materials selection for consumer products invites a dizzying range of considerations: Are the chemicals hormone disruptors, carcinogens, or persistent, bioaccumulative, or toxic? What toxicogenomic biomarkers might make the product the next celebrity tort case? What labeling requirements apply? What are the implications of ...


    By Acta Group

  • Accelerating the fuzzy front-end of NPD projects: methods and management

    In rapidly changing competitive conditions, firms competing on the basis of their new products need to be proficient in accelerating their product development programmes. Several research studies have suggested that the entire NPD process can be improved. In this paper, however, we focus on the 'upfront' or 'fuzzy front-end' (FFE) phase. We review several studies which reveal useful insights into ...


    By Inderscience Publishers

  • A review on conceptual design with morphological indicators

    The theory of morphological indicators (MIs) provides user-friendly tools guiding the structural designer towards low volume consuming solutions during the exploration and comparison of different structural types. Since the first doctoral thesis published by Samyn (1999), a decay of research has refined MIs into a benchmarked structural optimisation method for conceptual design. This paper ...


    By Inderscience Publishers

  • 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 ...

  • On the job training checklists improve efficiency

    The most widely used method of training is known by many names. Demonstration, skill assessment, job performance,proficiency testing and on-thejob (OJT) are just a few names associated with training in the field. Regardless of thename chosen, OJT as commonly practiced has some common characteristics, including : 1) The location of training is the actual work site, 2) An experienced employee ...


    By ABS Consulting

  • Enabling interoperability of STEP Application Protocols at meta-data and knowledge level

    Numerous proposals exist worldwide for the representation of data models and services for the main manufacturing activities. The ISO10303 STEP has developed more than 40 standard Application Protocols for product data representation, and they reflect the consolidated expertise of major industrial worldwide specialists working together for more than 20 years, covering the principal product data ...


    By Inderscience Publishers

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