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Development and Characterization of Bottom-Viewed Inductively Coupled Plasma-Atomic Emission Spectrometry

Development and Characterization of Bottom-Viewed Inductively Coupled Plasma-Atomic Emission Spectrometry


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About the Book

This dissertation, "Development and Characterization of Bottom-viewed Inductively Coupled Plasma-atomic Emission Spectrometry" by Bun-luen, Tim, Tse, 謝斌麟, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled DEVELOPMENT AND CHARACTERIZATION OF BOTTOM-VIEWED INDUCTIVELY COUPLED PLASMA-ATOMIC EMISSION SPECTROMETRY Submitted by Tse Bun Luen Tim For the degree of Master of Philosophy at The University of Hong Kong in August 2007 In bottom-viewed inductively coupled plasma-atomic emission spectrometry (BVICP-AES), emission from the central channel of the plasma is measured axially from the bottom of the plasma. A straight quartz tube was used as a hollow light pipe (HLP) to collect plasma emission. The HLP also serves as an injector for aerosols transport and injection into the ICP. The optical characteristics of HLPs with the original reflective surface and roughened outer surface are reported. The roughened HLP is effective in rejecting light beams that are not in line with the HLP. The transmission efficiency of the HLP, however, is high (>70%) for light beams from a source that has the same dimension as the entrance of the HLP and is flush with the HLP. The HLP may be effective in rejecting background emission from the core of the plasma that encircles the plasma central channel and yet efficient in light collection from the central channel of the plasma. The effect of central channel gas flow rate on BV-ICP emission intensity was studied using HLPs of internal diameter of 2 mm and 3 mm. Emission intensities of 13 atomic and ionic lines of a wide range of excitation and ionization potentials were measured. For most emission lines, the maximum analyte emission intensity was found at the central channel gas flow rate that corresponded to the minimum gas flow rate for effective aerosol injection into the plasma. Therefore, high sensitivity measurement in BV-ICP can be achieved using relatively low central channel gas flow rates (0.3 to 0.6 L/min). The measured integrated intensity using the 3-mm HLP was approximately 2 times that of the 2-mm HLP for the same analyte mass flux. The effect of water loading on BV-ICP measurement was studied. An ultrasonic nebulizer was used to generate "wet" and "desolvated" aerosols by switching the desolvation system of the nebulizer off and on, respectively. Water loading of the "wet" and "desolvated" aerosols was 12 and DOI: 10.5353/th_b3955738 Subjects: Inductively coupled plasma atomic emission spectrometry


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Product Details
  • ISBN-13: 9781361427095
  • Publisher: Open Dissertation Press
  • Publisher Imprint: Open Dissertation Press
  • Height: 279 mm
  • No of Pages: 138
  • Weight: 612 gr
  • ISBN-10: 1361427094
  • Publisher Date: 27 Jan 2017
  • Binding: Hardback
  • Language: English
  • Spine Width: 10 mm
  • Width: 216 mm


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