nitrite determination News

  • Enzymatic Nitrate Determination Now an ASTM Standard Method

    NECi enzymatic method for nitrate determination is now an ASTM International Standard Method.  This method is meant to replace methods D1254 (Nitrite) and D992 (Nitrate).   Method D1254 uses a reagent which is considered to be a possible carcinogen. Method D992 is mentioned by ASTM to "have relatively large errors when used in wastewaters and also has greater manipulative difficulties" ...


    By NECi Superior Enzymes

  • Enzyme-based nitrate determination receives USGS Standard Method designation

    RECOMBINANT PROTEIN TECHNOLOGY for GREEN ANALYTICAL CHEMISTRY:  USGS Standard Methods I-2457-11 and I-2458-11  Analytical chemistry for environmental monitoring often requires hazardous reagents.  NECi’s enzyme-based nitrate reagents replace cadmium reduction with reagent-grade, environmentally benign enzymes.  The resulting nitrite is determined by standard ...


    By NECi Superior Enzymes

  • Enzyme Based Nitrate Determination Method for Wastewater Reaches First Step in EPA Approval

    The U.S. Environmental Protection Agency (EPA) has determined that The Nitrate Elimination Company, Inc. (NECi) Method N07-0003 “Method for Nitrate Reductase Nitrate-Nitrogen Analysis” meets all requirements for measurement of nitrate and combined nitrate-nitrite in wastewater. Enzyme-based nitrate analysis will be recommended for inclusion in the list of 40 CFR Part 136 in ...


    By NECi Superior Enzymes

  • Capillary electrophoresis method according to EPA 6500 and ASTM D6508-10

    Lumex Instruments introduces a capillary electrophoresis method for determination of inorganic anions; fluoride, bromide, chloride, nitrite, nitrate, ortho-phosphate, and sulfate in drinking water, wastewater and ground water according to EPA 6500 and ASTM D6508-10 test methods. This test method is applicable for ...


    By Lumex Instruments Group

  • Photometry Compendium - Episode 6 is live!

    Besides the methods that use a chemical reaction to create a concentration dependant colour change, which can then be measured, there are many substances that can be measured without a colour reaction provided they absorb light within the wave length range of the photometer. To date, used exclusively in water treatment plants, a technique is available which is able to detect several parameters ...


    By WTW - a xylem brand

  • Ozone Testing Protects People and the Environment

    EMSL Analytical provides complete ozone testing services to shield people from unnecessary exposure and to help manufacturers test products and equipment. Ozone consisting of three oxygen atoms and is beneficial in the upper atmosphere due to its ability to protect the planet from harmful radiation.  However, tropospheric ozone, also known as low level ozone, is recognized by the World ...


    By EMSL Analytical, Inc.

  • NECi at NEMC 2014

    The Nitrate Elimination Company, Inc. (NECi), will be attending the National Environmental Monitoring Conference to be held at The Hyatt Regency in Washington, DC August 4th-8th.   NECi will be presenting nitrate analysis by nitrate reductase during the Environmental Measurement Symposiom Technology Showcase on Tuesday, August 5th from 5:00pm-7:30pm.  Visit the NECi table to learn more ...


    By NECi Superior Enzymes

  • New methodology for poolside compliance testing

    A new method using a water proof meter with built in photo cell and reagent delivery device (test strips) was presented at the 5th Annual World Aquatic Health™ Conference in Colorado Springs October 17th. Ivars Jaunakais, President of Industrial Test Systems, Inc. (ITS), presented a new method for pool water testing last week during the annual World Aquatic Health Conference. The ...

  • Q&A about national general survey on soil contamination in China

    MEP and MLR announced the report on the national general survey on soil contamination today, and the survey results showed the general condition of the soil environment across the country not optimistic; some areas are suffering from bad soil pollution, the environmental quality of the arable land is worrying, and there are pressing soil environmental problems in industrial and mining deserted ...

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