certified reference Articles

  • Atrazine accuracy confirmation using EPA certified reference standard

    ANALYTE: Atrazine RANGE OF EVALUATION: 0.5 to 4.0 ppb MATERIALS: Atrazine RaPID Assay Kit and Sample Diluent (cat. no. A00051) Reagents: U.S. EPA Reference Standard for atrazine with certified concentration of 1000 μg/mL, in methanol ( NSI Environmental Solutions, Research Triangle Park, NC). Equipment: precision micropipets: 100 ...


  • 2,4-D accuracy confirmation using EPA certified reference standard

    ANALYTE: 2,4-D RANGE OF EVALUATION: to 40 ppb MATERIALS: 2,4-D RaPID Assay Kit and Sample Diluent (cat. no. A00079) Reagents: U.S. EPA Reference Standard for 2,4-D with certified concentration of 5000 μg/mL, in acetonitrile (N SI Environmental Solutions, Research Triangle Park,N C). Equipment: 100 μL ...


  • Designed to vs. Certified

    Most bolted steel tank companies use the term “designed to” when referring to industry and quality standards. At Superior Tank Co., Inc. we can positively confirm all of our tanks meet or exceed the expected design and quality objectives. Superior Tank has undergone the very rigorous API SPEC Q1 and ISO 9001:2008 certification process which reviews the various elements of bolted steel ...


    By Superior Tank Co., Inc.

  • Reference: Outstanding technology delivers outstanding potable water

    Outstanding technology delivers outstanding potable water High-tech comes to the Sauerland region: To supply potable water, Stadtwerke Sundern uses state-of-the-art technology. When the time came to modernise their three waterworks, the first-class quality of ProMinent's products and systems was the deciding factor. Key figures ...

  • Brüel & Kjær’s vibration check systems validated and certified by Turbomeca

    Since 2002, Brüel & Kjær has been working very closely with Turbomeca to develop dedicated Vibration Check systems for helicopter engines, measured on the aircraft on the ground during engine run-up. This has resulted in a range of standard systems that can be used for measurements on virtually all Turbomeca engines used on helicopters. Turbomeca has issued Service Letters to ...

  • What is a certified industrial hygienist? do i need one?

    The first question is: What is an Industrial Hygienist?  The simplest definition is:  A person whose job it is to protect the health of workers and the general public.  Through education and experience an Industrial Hygienist has the ability to recognize health hazards, test the environment for those hazards, determine if there is a risk to human health in a particular situation, ...


    By Atlantic Environmental, Inc.

  • EDXRF Analysis of Lead, Cadmium, Silver, Copper in Lead-Free Solder Materials

    X-ray fluorescence analysis can be used to quickly and easily analyze samples in solid, powder, and liquid states nondestructively, and is therefore widely used as a screening technique for compliance with the RoHS/ELV directives. A large amount of lead-free solder is used for surface-mount circuit boards. Here we evaluated the sensitivity of analysis of Pb, Cd, Ag, and Cu in lead-free solder ...

  • Relative Accuracy Testing of an X-Ray Fluorescence-Based Mercury Monitor at Coal-Fired Boilers

    ABSTRACT The relative accuracy (RA) of a newly developed mercury continuous emissions monitor, based on X-ray fluorescence, was determined by comparing analysis results at coal-fired plants with two certified reference methods (American Society for Testing and Materials [ASTM] Method D6784-02 and U.S. Environment Protection Agency [EPA] Method 29). During the first determination, the ...


    By Cooper Environmental

  • News on Air 2013: Special Edition for Petrochemical Industry

    This volume features Air Monitoring products that are used the petrochemical industry to ensure worker and community safety.  Supelco's air monitoring products are useful for sampling of indoor (workplace) air and ambient air for a wide variety of analytes, such as aldehydes, volatile organic chemicals (VOC), benzene, toluene, ethyl benzene and xylene (BTEX) and other polyaromatic compounds ...


    By Sigma-Aldrich Co., LLC

  • Analysis of metal concentration levels in water, sediment and fish tissues from Toledo municipal lake by applying SR-TXRF technique

    The main objective of this study was to evaluate the metal content in water and sediment from the Toledo municipal lake, as well as the concentration levels of heavy metals in muscle and liver of four fish species. A digestion procedure was performed in all fish samples. Metal analysis was performed by using the Synchrotron Radiation X-ray Fluorescence technique. The accuracy and validity of the ...


    By IWA Publishing

  • Benefit from cassava plants - Hofstetter builds a CDM plant in Indonesia

    Hindelbank - Indonesia ranks as the fourth largest cassava producer in the world. Because of its starchy tubers, cultivation of the cassava plant is an essential part of agriculture in Indonesia. In the Lampung region on the island of Sumatra, the Sahabat Group is expanding the existing production of cassava starch. During the process of extracting the starch, waste water is produced which ...


    By Hofstetter BV

  • Arsenic, antimony and chromium speciation using HPLC-ICP-MS in selected river ecosystems of Upper Silesia, Poland – a preliminary study and validation of methodology

    Upper Silesia is the most transformed by humans of the Polish territories. As a result of mining, urbanization and other industrial activities, irreversible changes have taken place in the environment. In this paper, the method of collecting, preserving, storing and preparing samples from four Silesian rivers was optimized. Silesian sediment and river water samples are a challenge for the ...


    By IWA Publishing

  • Determination of mercury speciation in fish tissue with a direct mercury analyzer

    Knowledge of mercury speciation in tissue is valuable for assessing potential toxicological effects in fish. Direct mercury analyzers, which use thermal decomposition and atomic absorption spectrometry, have recently gained popularity for determining organic mercury after procedural solvent extraction from some environmental media, although quantitative recovery from lipid‐rich materials, such ...


    By John Wiley & Sons, Ltd.

  • Using FIMS to determine mercury content in sewage sludge, sediment and soil samples

    Tim Flow Injection Mercury System (FIMS) is a dedicated system that integrates flow injection mercury cold vapor generation with a very sensitive detector. The exceptional system stability and the long path measurement cell provide instrumental detection limits as low as 5 ng/L using a sample volume of 5(H) jxL. The improved sensitivity of the FIMS permits sample dilution, therefore reducing the ...


    By PerkinElmer, Inc.

  • Determination of Cadmium in the Tap Water by Flameless Atomic Absorption Spectrometry

    The standard for the allowable concentration of cadmium in tap water has been revised downward from 0.01 mg/L or less to 0.003 mg/L or less according to Japan's "Ministerial Ordinance for Partial Revision of the Ordinance Concerning the Water Quality Standard" (The Ministry of Health, Labour and Welfare Ordinance No.18) (February 17, 2010). The revised standard has been in effect since April 1, ...

  • An interlaboratory comparison study for the determination of dialkyl phthalate esters in environmental and biological samples

    A series of interlaboratory comparison exercises were conducted to assess the accuracy of dialkyl phthalate ester (DPE) concentration measurements in environmental and biological samples. Five laboratories participated in analyses to determine DPE concentrations in standard test solutions; marine sediments; three certified reference materials (CRMs), including CARP‐2 (fish muscle) and BCR‐07 ...


    By John Wiley & Sons, Ltd.

  • Protecting vernal pools: a model from Massachusetts, USA

    Abstract  Ephemeral ponded wetlands, often referred to as vernal pools in the wetland’s lexicon of the northeastern United States, are in need of protection from outright loss, catastrophic alteration, and disruption of natural processes in the surrounding landscape, because of their great importance to a characteristic wildlife fauna. The state of Massachusetts, USA provides a useful model ...


  • Measuring level by weight

    Measuring level or inventory by weight provides high accuracy. The weight is not affected by ingredients that foam or settle unevenly or by changes in density or the shape of the tank. Weight is weight, regardless of percent solids, bridging, rat-holing, or whether your ingredient is conductive or sound-absorbing. Because weighing is a noncontact method of measuring level, there is no chance of ...


    By Hardy Process Solutions

  • Legal Lookout: EPA Proposes Lead-Based Paint Removal Requirements

    Untitled Document On Jan 10, 2006, EPA proposed extensive requirements to minimize the introduction of lead hazards resulting from the disturbance of lead-based paint during ...


    By Bergeson & Campbell, P.C.

  • CIRAS-2 User Recalibration of CO2 and H2O

    The CIRAS-2 CO2/H2O analyzer is an inherently stable instrument and does NOT require frequent calibration. The AutoZero function corrects for nearly all changes that result in calibration drifts. The most common causes of drifts in CIRAS-2 readings are i) incorrect Zeros due to exhausted chemicals or ii) leaks on the desiccant columns from rolled or damaged o-rings and iii) incorrect Diff Bal, ...


    By PP Systems

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