optical spectroscopy system Articles

  • 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.

  • Encoded photometric infrared spectroscopy

    General Principle The EP-IR system contains the encoder-spectrograph, as well as a real-time embedded micro-processor for signal analysis, data treatment, and Chemometrics (quantitative) analysis in a single small-footprint enclosure. Operation Principle An infrared polychromatic beam is emitted from an external source (e.g. glow bar) onto the sample. Then ...


    By CIC Photonics, Inc.

  • Nanoparticles and nanowires: synchrotron spectroscopy studies

    This paper reviews the research in nanomaterials conducted in our laboratory in the last decade using conventional and synchrotron radiation techniques. While preparative and conventional characterisation techniques are described, emphasis is placed on the analysis of nanomaterials using synchrotron radiation. Materials of primary interests are metal nanoparticles and semiconductor nanowires and ...


    By Inderscience Publishers

  • Analysis of wastewater for metals using ICP-OES

    The analysis of wastewater for trace metal contamination is an important step in ensuring human and environmental health. Wastewater is regulated differently in different countries, but the goal is to minimize the pollution introduced into natural waterways. In the U.S., the Environmental Protection Agency (EPA), in conjunction with the states, negotiates a discharge permit through the National ...


    By PerkinElmer, Inc.

  • Single photons from single CdSe quantum dot embedded in ZnSe nanowire

    We report the growth of ZnSe nanowires and nanoneedles using molecular beam epitaxy (MBE). Different growth regimes were found, depending on growth temperature and the Zn-Se flux ratio. By employing a combined MBE growth of nanowires and nanoneedles without any postprocessing of the sample, we achieved an efficient suppression of stacking fault defects. This is confirmed by transmission electron ...


    By Inderscience Publishers

  • Water and environmental analysis according to US EPA regulations using the lambda 25/35/45 UV/Vis spectrophotometers

    UV/Vis spectroscopy is an important analytical technique used for the determination of many water constituents. Environmental regulations in many countries prescribe the use of UV/Vis spectroscopy. Depending on the method, UV/Vis determinations of metal and organic nonmetal analytes in water have a minimum detectability in the ppb-ppm range. The Lambda UV/Vis Spectrophotometers ...


    By PerkinElmer, Inc.

  • New Process Gas Analyzer for the Measurement of Water Vapor

    KEYWORDS TDLAS, WMS, Laser Spectroscopy, Water Vapor Measurement, Gas Analyzer ABSTRACT A new analyzer for the measurement of water vapor concentration based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) was developed. The water-vapor line at 1854-nm was selected for the measurement, and the performance of the system was evaluated on different ...

  • Monitoring the performance of moisture purifiers for process gases

    Problem Statement Moisture purifiers are a big aid in keeping moisture levels under control inside a process chamber. They are provided by manufacturers with certain life expectancies, which vary depending on the moisture content of the gas being purified. As a result, it is difficult to determine which gases have a high moisture content and which moisture purifier is becoming ...


    By CIC Photonics, Inc.

  • Detection of early PFA seals (perfluoroalk-oxyethylene) degradation exposed to process gases inside a reactor chamber

    Problem Statement Replacement of PFA seals inside the reactor chamber is performed according scheduled maintenance and life expectancy of the seals. Early degradation of seals goes completely undetected until there is a complete failure of the seal, letting atmospheric contaminants inside the reactor and forcing an unscheduled reactor downtime. IRGAS ...


    By CIC Photonics, Inc.

  • Remote sensing of emissions: new technologies and recent work

    The Second International Workshop on Remote Sensing of Emissions: New Technologies and Recent Work was held April 1-3, 2008. The workshop was sponsored by the U.S. Environmental Protection Agency's (EPA) Office of Air Quality Planning and Standards at Research Triangle Park (RTP), Office of Research and Development (RTP), and Office of Solid Waste and Emergency Response (HQ). At the workshop, ...

  • Continuous monitoring of moisture present inside a process chamber

    Problem Statement Moisture inside a process chamber is a big silent killer during wafer production. When production yield goes down, it is hard to pinpoint the source of the problem. Most of the time wafers need to be sent to labs for analysis, while production is stopped. If the problem is related to a high level of moisture inside the reactor, there are several factors that can cause ...


    By CIC Photonics, Inc.

  • Detection and measurement of toxic gases from destructive testing of batteries

    Problem Statement New formulations of organic-compound-based batteries for vehicle use must be tested for release of potentially harmful and toxic gases if crushed in accidents. Potential gases include hydrocarbons, fluorocarbons, and hydrogen fluoride, released within seconds of an incident. Actual time-resolved and quantitative data are required from destructive testing to ascertain ...


    By CIC Photonics, Inc.

  • BLUE LIGHT CONVERTER SIGNALS WAY FORWARD FOR NO2 MEASUREMENT

    Local authorities seeking more accurate NO2 readings should consider using analysers which incorporate ‘Blue Light Converters’ says air quality monitoring specialists Enviro Technology.   This comment comes following a presentation held at the Royal Society of Chemistry / AAMG Conference in December 2010 by EMPA (Switzerland) – an independent research and services ...

  • Hydrogen Chloride Analyzer (HCl, H2O)

    LGR's Hydrogen Chloride Analyzer (HCl, H2O) provides sensitive measurements of HCl in ambient air or in industrial process flows (e.g., coal and cement exhaust streams) with extremely high precision and sensitivity. No longer do you have to spend a lot of money or wait a long time to measure HCl with extremely high sensitivity – LGR's HCl Analyzer provides measurements every second with ...

  • What makes TERS `shine` today?

    After more than 15 years since TERS had its first proof of concept, HORIBA Scientific and AIST-NT have created  a solution that brings TERS as an analytical method to a completely new level. TERS is not only able to perform so-called point measurements, but now TERS spectra can be collected in every single ...


    By HORIBA Europe GmbH

  • Analysis of low levels of metals in drinking water with a scanning array ICP emission spectrometer and ultrasonic nebulization

    Drinking water is an important factor in exposure to environmental contaminants and is used in preparing foods and beverages for human consumption. Therefore, great care is used to verify that it is free of or contains acceptable limits of toxic substances. With respect to heavy metals and other toxicologically relevant elements, atomic spectrometric techniques are frequently used to determine ...


    By PerkinElmer, Inc.

  • A novel spectrometer design for process and handheld infrared spectral measurements

    Introduction Infrared spectroscopy offers many unique advantages for measurements within an industrial environment. Historically, the technique has been used for a broad range of applications from the composition of gas and liquid mixtures to the analysis of trace components for gas purity analysis. In cases where a well-defined method of analysis is involved, such as the measurement of ...


    By CIC Photonics, Inc.

  • Multiple gas impurity analyses and verification for semiconductor process tools

    With the increased emphasis on the purity of cleaning, etching and treatment gases by the semiconductor industry, advanced analysis instrumentation is required to monitor the electronic specialty gases and to verify the performance of process tools and components. This paper describes new instrumentation and software specifically designed to accomplish ppb level gas analyses in times as short as ...


    By CIC Photonics, Inc.

  • A Comparison of Point Sensors and Open Path Monitors For Toxic Gas (esp. HF) Monitoring

    Point Sensors Ion Mobility Spectroscope (IMS) – a gas sample is ionized by a radioactive source (Ni63). Differences in ion drift under the influence of an applied electric field produce a spectrum that is dependent on the mass, charge, and shape of the component ions. The detector signal and strength is tuned to the drift time of the ion of interest (in this case HF) and signal strength is ...


    By Boreal Laser Inc.

  • TITECH Technology installed at UPM Materials Recovery

    An estimated 13.2 million tonnes of paper and board products were consumed in the UK in 2008, with 67% of this paper recovered for recycling. Currently recycling rates for paper within the UK are generally very good and are improving, yet there are issues with the quantity and quality of paper for reuse in paper mills. Newsprint and board mills are the main users of recovered paper as their ...


    By TOMRA Sorting (TITECH)

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