kjeldahl-n Articles

  • Oil Sampling Best Practices (Part 2)

    Understanding Dynamic Particle Equilibrium in Closed Loop Systems Dynamic Equilibrium Condition (DEC) is defined as a steady state condition where the normal wear rate in a machine results in no net gain or loss of particles. ...


    By Spectro Scientific

  • Importance of Inspecting Reservoirs

    Inspecting Reservoirs – what is the importance of them, why they are inspected, and how ROVs help pave the way for low-cost, regular maintenance. What is a Reservoir? Deriving from the French word réservoir meaning “storehouse,” a reservoir is exactly that – a storage place for water. More often than not, these bodies of water are ...


    By Deep Trekker Inc.

  • Healthy Habits - Improving Wellbeing on a Work Schedule

    As we firmly embrace 2017 crashing into these strange new numbers head on, many of us will be facing the harsh reality of our New Year resolutions; perhaps – just perhaps – in many cases feeling like we’ve promised just a little more than we can deliver. Taking an educated guess, it’s safe to assume many people’s plans will consist of some effort to get back into ...


    By SHEilds Ltd

  • Oil Sampling Best Practices

    Obtaining a representative oil sample from a closed loop lubrication system is essential to any good oil analysis program. As oil analysis programs become more standardized for routine monitoring, especially within equipment warranty support programs, equipment makers provide more sampling points on new equipment. These ...


    By Spectro Scientific

  • E-Z Trays an Integral Part of Levelland`s Groundwater Treatment - Case Study

    QED E-Z Tray® Air Strippers an Integral Part of Levelland's Groundwater Treatment System The refinery at the former Motor Fuels Corporation produced all grades of gasoline, tractor fuels, diesel, distillate products, and fuel oils. It closed in 1954 after 15 years of operation, and the refinery equipment was removed by 1958. The property has since been redeveloped, but the ...


    By QED Environmental Systems

  • ALBANISA Oil Spill Equipment Setup - Case Study

    As a part of the Bolivarian Alliance for the People of Our America (acronym in Spanish: ALBA), Nicaragua has received funds to build a new oil hub in the Caribbean. The hub will be available for oil companies in order to store their products before reaching its final destination. By doing that the profit will be increased as the costs for transportion is reduced. The updated environmental ...


    By DESMI A/S

  • Innovas Project Update: Memorial Hospital of South Bend

    Innovas recently commissioned Helios Tube Cleaning Systems at Memorial Hospital of South Bend, servicing eight Trane chillers, including four new 900-ton chillers and retrofits to four existing chillers.  The chilled water plant provides more than 5,600 tons of cooling capacity for Memoral Hospital of South Bend and the adjacent Memorial Children’s Hospital. As part of the chilled ...


    By Innovas Technologies LLC

  • Zero Waste Co., Ltd, Bangkok, Thailand - Case Study

    Thailand has a very comprehensive waste management system. Their national disposal plan is organized by the Royal Thai Government, and then distributed among the central government, regional governments, and local governments. Each agency oversees different part of the system. The central government and its ministries set standards and policies and define regulatory regimes. Provincial and ...


    By All Power Labs

  • Transformation of the waste business influences all business owners

    Even if recycling was expensive and unprofitable in the past, it will not be that in the future. We need to stop landfilling valuable materials for the sake of our business and for the sake of the globe. A huge, global transformation in waste management has already begun. The biggest driver of change is related legislation that makes us shift towards recycling and material recovery. The pace ...


    By Tana Oy

  • Treating drinking water with 99% removal - Case Study

    QED E-Z Tray® Air Stripper Treating Drinking Water with 99% Removal in Cedarburg, Wisconsin In October 2011, the Cedarburg, Wisconsin Light and Water Utility installed a QED E-Z Tray® (U.S. Patent Number 5,518,668) Air Stripper in a discreet addition to their existing production pump building. The E-Z Tray 72.6 handles a flow rate of ...


    By QED Environmental Systems

  • Selective nitrogen determination methods related to Kjeldahl

    KjelMaster System K-375 / K-376, KjelDigester K-449, Scrubber K-415 85 % of the world’s nitrogen demand for fertilizer is primarily derived from ammonia in the form of urea, ammonium nitrate, phosphate and sulfate. Ammoniacal components can also be found in soil, sludge and bio waste. In those sample matrices, a mixture of several nitrogen containing compounds as urea, nitrogen from ...


    By BÜCHI Labortechnik AG

  • TKN determination in water and waste water (Total Kjeldahl Nitrogen)

    Colorimetric determination of TKN (Total Kjeldahl Nitrogen) in water and waste water according to the Kjeldahl method The determination of TKN (total Kjeldahl nitrogen) in water and waste water is a routine procedure for quality assurance and inspection. Here, a reliable procedure for the colorimetric TKN determination in water, according to ISO 5663, AOAC 973.48, and EPA 351.3 is ...


    By BÜCHI Labortechnik AG

  • How to Achieve Low Detection and Quantification Limits for the Nitrogen Determination with Kjeldahl

    Kjeldahl is one of the most commonly used techniques to determine the protein content in food and feed samples or the nitrogen content in soil, sludge, and water samples. The detection and quantification limits are important characteristics of analytical methods. The impact of the concentration of boric acid, the addition of potassium chloride, and the concentration of the titration solution on ...


    By BÜCHI Labortechnik AG

  • Synthesis and properties of B-C-N related nanomaterials

    C-N related nanomaterials have many interesting properties originating from their unique and changeable structure. In this paper, we present the synthesis techniques and properties of the B-C-N related nanostructures mainly including B-C-N nanotubes and carbon nanoparticles. The electronic properties of the ternary B-C-N nanotubes were experimentally controlled by controlling their structure and ...


    By Inderscience Publishers

  • Compensation Flow Gauge, N Wales case study

    Dwr Cymru Welsh Water Design, supply and installation of a compensation flow gauge at Cwmystradllyn Reservoir, North Wales. 2006 Hydro-Logic have been engaged by Dwr Cymru/Welsh Water since 2000 to operate, maintain and improve their hydrometric network. One of the projects involved the feasibility, design and installation of a new ultrasonic transit-time flow gauge on the discharge compensation ...


    By Hydro-Logic Services

  • Assessing n–order dependencies between critical infrastructures

    The protection of critical infrastructures (CI) is a complex task, since it involves the assessment of both internal and external security risk. In the recent literature, methodologies have been proposed that can be used to identify organisation–wise security threats, or even first–order dependency risk (i.e., risk deriving from direct dependencies). However, there is a lack of work ...


    By Inderscience Publishers

  • Flexibility beyond any limits - multi N/C

    With a multi N/C analyzer the parameters TOC, NPOC, POC, TC, TIC and TNb  can be measured quickly, easily and without any conversion. This is possible thanks to the perfect combination of an efficient sample digestion technology, VITAFlow Management System and Focus Radiation NDIR detector. TOC and TNb  are measured truly simultaneously, with a single injection and without any exchange ...


    By Analytik Jena AG

  • N-butane partial oxidation to maleic anhydride under transient regimes

    Maleic anhydride (MA) is commercially produced from partial oxidation of n-butane by air over vanadium pyrophosphate (VPP) catalyst. There has been a huge research interest to better understand the different aspects of this industrially attractive reaction including mechanism, dynamic catalyst phase evolutions as well as the effect of redox operating conditions such as gas/solid residence time, ...


    By Hiden Analytical

  • Application of a Medium Pressure UV System for the Treatment of N-Nitrosodimethylamine (NDMA)

    N-nitrosodimethylamine (NDMA) was first detected in 1990 as a problem pollutant in drinking water wells at levels as high as 3,000 ppt in Elmira, Ontario, Canada. The waste from a large chemical plant over many years had led to the contamination of the drinking water wells for the community. After extensive evaluation and testing, it was determined that UV photolysis was the most effective ...

  • Correlations between surrogate nitrogenous organic precursors and C-, N-DBP formation

    Nitrosamines have been emerging as disinfection byproducts in drinking water using source water impacted with domestic wastewaters. Nitrogenous organic compounds are suggested as precursors of nitrosamines, but many of them have not been identified. This study investigated the correlations between nine selected nitrogenous organic compounds with different characteristics and corresponding ...


    By IWA Publishing

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