Further development and optimization of a miniature in-torch vaporization sample introduction system and micro plasma device (mini-ITV-MPD).

摘要

Miniature and field portable analytical instruments are ideal for a variety of real time, on-site analysis applications. On-site analysis minimizes the opportunity for sample contamination. Consequently, on-site analysis provides more accurate and precise data in a shorter period time.;In the second part, a miniature Ion Mobility Spectrometer (mini-IMS) was designed and constructed. Ion mobility spectra were obtained with Corona Discharge (CD) ionization source. (Abstract shortened by UMI.);The first part of this project focused on further development and optimization of miniature In-Torch Vaporization (mini-ITV) sample introduction system and Micro Plasma Device (MPD) based on optical emission spectrometry (OES). Many parameters and operating conditions for mini-ITV and cylindrical geometry MPD were studied, which included vaporization powers for eight selected elements, MPD electrode distance, Re-coil insertion position and gas flow rate. Argon/hydrogen and helium/hydrogen mixtures were compared for this system. Analytical figures of merit were obtained, such as linearity, detection limits and precisions.