reference standard 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 ...


  • Simultaneous determination of PM fractions, particle number and particle size distribution in high time resolution applying one and the same optical measurement technique

    Abstract The Fidas fine dust monitoring systems comprise an optical aerosol spectrometer, which is characterized by very good instrument characteristics, and utilize a sophisticated approach to convert the measured information on particle number and particle size into mass concentrations. As monitoring of PM requires reliable and quality-controlled performance of the measuring systems, ...


    By Palas GmbH

  • 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 ...


  • What To Do When OSHA Arrives - Part 1

    Continuing Our Guide for New Plant Safety Managers You have been the new plant safety manager for a little over two months. During this timeframe you have had the opportunity to review the limited number of safety procedures left in your office by your predecessor and you are beginning to ...


    By Antea Group - USA

  • Study of vehicular emissions with reference to Pakistan's National Environmental Quality Standards: case study of District Swat, North of Pakistan

    This study was conducted during 2011–2012 with the objective to assess the ambient air quality in the surroundings of a newly constructed road in relation to Pakistan's Environmental Quality Standard (Pak–NEQS). The area was monitored twice, before and during the construction, to determine levels of sulphur dioxide, nitrous oxide, carbon monoxide, and PM10 (particulate matter). A ...


    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 ...

  • The influence of possible definitions of a reference environment to determine the exergy of air in buildings

    This paper critically analyses the influence of possible definitions of the standard state of air to determine the exergy of air in buildings. Three different contributions are considered related to differences in temperature, pressure, and humidity of air inside and outside the building envelope. The possibility to calculate the exergy of air in buildings, based on only one or two of these ...


    By Inderscience Publishers

  • Types of Environmental Standards

    Different kinds of environmental standards can serve quite different purposes in environmental policy. This note outlines these differences Ambient Standards Ambient standards set maximum allowable levels of a pollutant in the receiving medium (air, water and soil). Ambient standards can offer a simple method of establishing priorities since areas (or stream lengths) which ...


  • Leveraging Standards in the Energy Resurgence

    An Interview with Fred Walas, P.E., Fuels Technology Manager, Marathon Petroleum Company Marathon Petroleum’s Fred Walas talks about today’s energy developments, sustainability at his company’s refineries and the crucial role of standards in fuel production and quality control. As the energy spectrum shifts in the United States, forms of resource extraction and ...


    By ASTM International

  • The Need to Clearly State the Reference Temperature and Pressure Conditions when Reporting Gas Volumes or Volumetric Flow Rates

    In the physical sciences, such as chemistry, the standard temperature and pressure (STP) is a set of conditions for experimental measurements that enables true comparisons between sets of data representing gas volumes. There are many different definitions of standard temperatures and pressures applicable to gas volumes and volumetric flow rates. The differences depend on the organization defining ...


    By F&J SPECIALTY PRODUCTS, INC.

  • Comparative Evaluation of Test Methods for Reciprocating Engines; EPA Reference Methods vs. Portable Analyzer

    Abstract This is a comparative evaluation of errors in testing engines using reference methods and portable analyzers. New Mexico Environment Department (NMED) Air Quality Bureau has published a guidance document, Standard Operating Procedure (SOP), Use of Portable Analyzers in Performance Tests. EPA provides guidance on reference method testing in 40 CFR 60, Appendix A. This document is ...


    By Trinity Consultants

  • Stability and accuracy of CIRAS-2 Water Vapor (reference humidity): control option 1

    Summary Rapid large-scale fluctuations of carbon dioxide and water vapor, although unnatural and artificial in the plant world, are desirable attributes for gas exchange systems from a sampling efficiency standpoint. As PP Systems’ benchmark IRGA system for gas exchange and photosynthesis research, CIRAS-2 was designed for and expected to have exceptional response times to ...


    By PP Systems

  • U.S. adopts global transportation standards

    New proposed shipping rules that harmonize with international standards will require some study. On Aug. 24, 2010, the Department of Transportation's Pipeline and Hazardous Materials Safety Administration (PHMSA) proposed to harmonize the Hazardous Materials Regulations (HMR) with international standards – 75 Fed. Reg. 52069. The proposed rule revises several proper shipping names, hazard ...


    By Bergeson & Campbell, P.C.

  • The bottom line on renewable electricity standards

    What is a Renewable Electricity Standard (RES)? A RES requires that a minimum percentage or amount of electric power generation come from eligible renewable energy sources by a specified date. Retail electric power suppliers (also known as load-serving entities) must purchase power directly from renewable electricity generators, or in some cases, are allowed to purchase renewable energy credits ...

  • Highly-Standardize Batteries for Express Convenience

    Batteries of any kind matters to the preservation of renewable energies. Hence, we are referring to the ways of preservation of renewable energies here, including solar and wind energy. In fact, the availability of solar and wind energy is passively argued in several times because solar energy is precisely presence in ...


    By Greenshine New Energy LLC

  • Editor’s perspective - solvent cleanup standards

    Risk-assessment science is a critical tenet of the remediation industry, as it is the underlying basis of the majority of cleanup work performed. However, risk-assessment science is, for the most part, poorly understood by a large portion of environmental professionals. Most seasoned professionals understand the basic risk-assessment concepts related to the dose-response and exposure duration ...

  • High-Purity DNPH Standards for Monitoring of Atmospheric Carbonyls

    Analysts monitoring for atmospheric carbonyls follow prescribed methods published by the US Environmental Protection Agency, the California Air Resource Board, and the American Society for Testing and Materials (ASTM®). These methods call for trapping carbonyls on an adsorbent coated with dinitrophenylhydrazine (DNPH). Sigma Aldrich offers more than fifty 2,4-DNPH carbonyl derivative ...


    By Sigma-Aldrich Co., LLC

  • The regulatory and standards landscape of Canada’s public infrastructure

    IntroductionInfrastructure Canada (INFC) is the Government of Canada’s focal point for making strategic investments in public infrastructure and advancing the New Deal for Cities and Communities. Research is a fundamental building block for both. INFC is committed tbuilding, connecting and sharing knowledge about public infrastructure and communities. The department identified governance as ...


    By CSA Standards

  • Biosolids Applied to Land: Advancing Standards and Practices

    Summary Wastewater treatment in the United States is a major cornerstone of efforts to keep the nation’s waters clean. Sewage sludge is the solid, semisolid, or liquid residue generated during treatment of domestic sewage. Since the early 1970s, the U.S. Environmental Protection Agency (EPA) and the wastewater treatment industry have promoted recycling of sewage sludge. With the prohibition of ...


  • Future standards and their effect on solenoid valve technology

    Untitled Document Valves have made remarkable progress over the last three decades. Manual shutoff has given way to automated shutdown systems. In-line mounted valves have lost their ...


    By Baum Publications Ltd.

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