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  • VibroFibreTM Sensor Application Note(pdf file, 8.2MB) (.ppt)
    Fibre Optics and Photonics are uniquely suited for distributed, remote sensing and monitoring applications in harsh environments. Self-calibrating, the QPS VibroFibreTM fibre gratings sensors are passive and immune to EMI and RFI; they have been successfully introduced to stator end winding
  • Industrial Hygiene Monitoring with a Portable GC
    for EPA in Washington DC several years ago. Thus indoor air pollution problems are becoming a significant problem for industrial hygienists. The ability to measure low levels (ppt - ppb) is a must if indoor air pollution studies are to lead to results because the measurement of high ppb to ppm levels
  • Micro: Implementing enhanced ICP-MS technology to attain SEMI Grade 5 purity levels
    Katsu Kawabata and Yoko Kishi, Data generated at a chemical supplier s facility illustrate that trace elements in hydrogen peroxide can be detected at the proposed 10-ppt level using a new approach to ICP mass spectrometry. s integrated circuits become more compact and electronic devices shrink
  • New Test To Detect Triclosan in Water
    Chemist Weilin Shelver (left) and technician Amy McGarvey examine ELISA test results of river water, tap water, and sewage samples for content of the widely used antibacterial agent triclosan. A new test that detects triclosan at a concentration of 20 parts per trillion (ppt)--the equivalent of 1
  • MICRO:Ultrapure Water Analysis, by Karen Franklin, p.51 (Sept '99)
    (Boulder, CO), a subsidiary of Ionics. Featuring an automated, on-line standard addition mechanism, its Ultrapure PPT instrument enables users to verify the accuracy of TOC measurements on-line. MICRO:Ultrapure Water Analysis, by Karen Franklin, p.51 (Sept '99
  • Certifying gas distribution systems in a fab producing advanced-technology devices
    industry dropped from 10 ppb to 10 ppt in less than 5 years. Under these conditions, the need to improve on-site contamination control by developing new limits of detection, standards criteria, and laboratory tools quickly became obvious. Additionally, gas distribution systems, having been identified
  • Real-time, High Precision Greenhouse Gas Measurements Using a Mid-Infrared Laser-Based Platform
    range. correlations of CO with CO. reflectance cavity, which must kept ultra-. 2. clean to be effective. In addition to ppt level. Figure 3: 24 hours time series of Methane concentration and associated Allan Variance. At 10. detection sensitivity, Mid-infrared based seconds averaging the precision
  • High Speed, High Resolution UHPLC Analysis of Aflatoxins in Food
    . conditions. For the analytical column, the Shim-pack. 0.175. 1. Aflatoxin G2 (5 ng/L). XR-ODS (100 mm L. × 3.0 mm I.D., 2.2 m) was used. 2. Aflatoxin G1 (20 ng/L). The concentrations of B. 0.150. 3. Aflatoxin B2 (5 ng/L). 1 and G1 were each 20 ng/L. (20 ppt), and those of B. 4. Aflatoxin B1 (20 ng/L). 3

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