light-scattering spectrometer Articles

  • Fast and reliable analysis of wastewater and sludges with a scanning array ICP emission spectrometer

    Wastewater and sludge analyses generally require the determination of many elements and are economically performed using ICP-OES, due to the speed and robustness of this technique. Several ICP-OES methods are available for this determination including EPA method 200.7 (1). In the USA, DIN 38 406 E22 (2) in Germany, or ISO 11885 (3) on a global scale. For this type of application, the ...


    By PerkinElmer, Inc.

  • Determination of K shell parameters of silver using high resolution HPGe detector spectrometer

    The K shell parameters such as K shell photoelectric cross–section at K shell binding energy, K shell jump ratio, K shell jump factor, the Davisson–Kirchner ratio and K shell oscillator strength of silver have been determined using high resolution HPGe detector coupled to 16K multichannel analyser. In this method the K X–ray photons in the energy region from 8 to 52 keV are ...


    By Inderscience Publishers

  • The Practical Application of Fine Time Increment, Diurnal, Nitrate Analyses Using Portable In Situ UV Spectrometers in an Effluent Dominated Urban Stream

     ABSTRACT Many wastewater facilities use a nitrifying biological process to eliminate or reduce ammonia concentrations which are toxic to fauna in their receiving water. One byproduct of this process is nitrate. Nitrate is generally non-toxic to fauna in receiving streams at levels produced by a nitrification process. However, chronic exposures of 10mg/L NO3-N, or greater, may produce ...

  • Spectral distribution of uv light during aging of medium pressure UV lamps

    As part of a project to validate a UV reactor for disinfection of drinking water, the germicidal output of four medium pressure lamps housed in a continuously operating reactor was followed as a function of time. Spectra were measured monthly and were used in conjunction with radiometer readings to calculate germicidal fluence rates (using DNA absorbance weighting) at the radiometer sensor ...

  • Global aerosols studied by NILU

    Aerosols scatter and absorb solar radiation and thereby influence the radiation in the atmosphere and the global climate. To understand the climate system and the ongoing climate change it is important to know the distribution of aerosols in the atmosphere. Satellites provide an extremely useful tool to study this distribution, especially since it is very inhomogeneous with respect to ...

  • The application of Flow Injection Technology to automating cold vapor MERCURY analyses

    This document describes the application of flow injection technology to cold vapor mercury analyses. It can be obtained from PerkinElmer by requesting method number ENVA-100. Appendices 1 and 2 show letters from the US EPA indicating acceptability through the Alternate Test Program for both drinking water and wastewater sample analysis. 1.0 Scope and Application 1.1 This ...


    By PerkinElmer, Inc.

  • FTIR Spectroscopy

    Fourier Transform Infrared (FTIR) Spectroscopy bases its functionality on the principle that almost all molecules absorb infrared light. Only the monatomic (He, Ne, Ar, etc) and homopolar diatomic (H2, N2, O2, etc) molecules do not absorb infrared light. Molecules only absorb infrared light at those frequencies where the infrared light affects the dipolar moment of the molecule. In a molecule, ...


    By CIC Photonics, Inc.

  • Get Comparable ASTM/EN Data for Biodiesel Blend Measurements While Saving Time and Money using Portable IR Analyzers

    Both EN 14078 and ASTM D7371 methods for measuring the percent biodiesel in diesel fuel use infrared analysis as the analytical method and are based around using an FTIR spectrometer which has the capability to do a multitude of analyses besides the biodiesel in diesel measurement. This is great for a laboratory where various biofuels measurements are required. However, if the only measurement ...


    By Spectro Scientific

  • Chromatography plays its part in turning Science Fiction into Science Fact

    Tomek Bagiński’s short film Ambition picks up on a fundamental drive of human kind, a thirst for knowledge and understanding, a thirst that can be sated through projects like Rosetta which are turning science fiction into science fact: Ambition the film Rosetta is an ESA mission with contributions ...


    By Anthias Consulting Ltd.

  • Photo-Fenton-like treatment of K-acid: assessment of treatability, toxicity and oxidation products

    Photo-Fenton-like treatment of the commercially important naphthalene sulphonate K-acid (2-naphthylamine-3,6,8-trisulphonic acid) was investigated using UV-C, UV-A and visible light irradiation. Changes in toxicity patterns were followed by the Vibrio fischeri bioassay. Rapid and complete degradation of K-acid accompanied with nearly complete oxidation and mineralization rates ...


    By IWA Publishing

  • X-ray slag monitoring

    According to market research published by the Freedonia Group in June 2006, global demand for cement is forecast to ‘grow to 4.7 per cent yearly through 2010’. While demand for Portland cement, which currently accounts for three-quarters of all cement sales worldwide, will be healthy, sales of blended cements are expected to climb at a faster pace. Similarly, the Slag Cement Association reports a ...


    By PANalytical

  • Removal of methylene blue from water by γ-MnO2

    Methylene blue (MB) is a cationic dyestuff, which is particularly resistant to biodegradation. The molecular sieved γ-MnO2 was used as an adsorbent/oxidant to remove the MB at room temperature and in visible light. The removal efficiency was mainly evaluated by X-ray diffractometer (XRD), UV–Vis spectrometer (UV–Vis), total organic carbon (TOC). The results revealed that the mechanisms of MB ...


    By IWA Publishing

  • Effect of age on quality and composition of one-humped camel Longissimus muscle

    This study aimed to investigate the effect of camel age on meat quality and muscle composition. Samples of Longissimus thoracis muscle were randomly collected from 14 Arabian one-humped camels (Camelus dromedarius) of two age groups: Group 1 (2?4 year-old) and Group 2 (4?8 year-old) at the Muscat Municipality central slaughterhouse. Meat quality including muscle ultimate pH, W-B-shear force, ...


    By Inderscience Publishers

  • Inactivation of Ascaris eggs in water using hydrogen peroxide and a Fenton type nanocatalyst (FeOx/C) synthesized by a novel hybrid production process

    Inactivation tests of Ascaris eggs (Ae) were performed using hydrogen peroxide and a Fenton type nanocatalyst supported on activated carbon (AC) (FeOx/C). Blank inactivation tests were also carried out using H2O2 and H2O2/AC as oxidation systems. The FeOx/C nanocatalyst was synthesized through a novel hybrid method developed in this work. The ...


    By IWA Publishing

  • Developing equipment specific lockout/tagout procedures – Case Study

    Challenge: Antea®Group was contracted by one of the world’s largest chemical manufacturing organizations to provide equipment-specific lockout / tagout procedures at their largest Research and Develop facility in North America. The overall objective of the project was to evaluate the worker risks during maintenance and repair operations associated with laboratory ...


    By Antea Group - USA

  • Using UV Fluorescent Technology to monitor for organic pollutants

    For many years the water industry has relied on traditional sampling techniques to monitor water quality in a wide range of environments. Traditional tests such as BOD, PH, Dissolved Oxygen and Ammonia have formed the bedrock of monitoring parameters. There are however other ways to establish water quality and UV fluorescence offers an up to date solution for the investigation of ...


    By Safe Training Systems Ltd

  • Optical couplers: key hardware for high quality FTIR spectroscopy

    Description Optical couplers are used to take the light coming from the source of a FTIR and route it through the sampling accessory and into the FTIR detector. This is an essential process in the effective use of the FTIR spectrometer. Therefore, optical couplers play an essential role in the proper use and maintenance of a FTIR system. Recognizing the importance of optical couplers ...


    By CIC Photonics, Inc.

  • Using Spectroscopy for Used Oil Analysis

    Evaluating the wear condition of equipment is a primary requirement of condition monitoring programs. Oil wetted equipment will generate wear particles throughout its lifetime, the nature and rate of the wear varies from initial ...


    By Spectro Scientific

  • Understanding the impact of snow`s reflectance

    To help improve the accuracy of climate models, an international team involving the National Physical Laboratory (NPL) has measured the reflectance of rough, snow-covered surfaces at large solar zenith angles. A crucial factor in climate models is Earth's albedo, which is the reflectance of Earth's surface: dark ground has a low albedo, reflecting little light, whereas ice and snow have a high ...

  • Why measuring the ambient NO2 without conversion?

    Nitrogen oxides NOx are pollutants that may have particular impact in terms of greenhouse gases, acidifying air etc ... issuance increased significantly since 1950 with the massive development of transport and industries. It therefore becomes necessary to provide measures always safer these pollutant gases, and to know the reliability of results. Currently, 60% of emissions of NO and NO2 are ...


    By Environnement S.A

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