Determination of absolute transport efficiencies of Be, Cd, In, Pb and Bi for electrothermal vaporization sample introduction into an inductively coupled plasma using an in-line electrostatic precipitator

A novel laboratory-constructed electrostatic precipitator for the determination of analyte transport efficiencies from a tube furnace electrothermal vaporization (ETV) sample introduction system is described. This simple experimental set up captures the analyte electrostatically using a negative corona discharge. The absolute transport efficiencies using experimental conditions typical of those applied to real analysis by ETV-ICP-MS were determined for Be, Cd, In, Pb and Bi to be 26 +/- 3, 39 +/- 8, 35 +/- 1, 50 +/- 11 and 35 +/- 1%, respectively. Pd and NaCl were evaluated as 'carriers' and were found to only marginally increase analyte transport for the elements investigated. Pd enhanced efficiencies 20-50% for all but Bi, which decreased by 17%. The NaCl produced transport enhancements of 10-50% for all five analytes. However, uncertainties in the measurements made several of the individual improvements statistically insignificant. The mean precipitator collection efficiency of the aerosol leaving the ETV for the five elements studied was found to be greater than 90% and was determined using the ICP-MS signal with the in-line precipitator's voltage either on or off. While 30 ETV firings were used for a single efficiency determination, reasonable precision could be obtained with approximately 10 firings while still employing reasonable analyte masses, i.e. approximately 20 ng. The transport results are in good agreement with previous studies using similar ETV design and analyte masses.


Analysis of the Raman intensities near the phase transitions in ammonium halides
Yurtseven, Hasan Hamit (Elsevier BV, 2008-12-01)
This study concentrates on the temperature dependence of the Raman intensities for the lattice modes in ammonium halides (NH4Cl and NH4Br) close to phase transitions, We predict their intensities using the results of a shell model for the Raman polarizability within the framework of an Ising pseudospin-phonon coupled model.
Calculation of the Raman frequencies of the translational mode in ammonia solid II
Yurtseven, Hasan Hamit (Elsevier BV, 2003-03-01)
We report here our calculated Raman frequencies of the translational mode as a function of temperature for the. fixed pressures of 3.65, 5.02 and 6.57 kbars in the ammonia solid II. They were calculated by means of our Gruneisen relation using the volume data from the literature for all the pressures indicated within the temperature regions close to the melting point in this system. Our calculated frequencies are in very-good agreement with those observed experimentally for this translational mode of the am...
Spectroscopic measurements of electron temperature and electron density in electron beam plasma generator based on collisional radiative model
Goktas, H.; Demir, A.; Kacar, E.; Hegazy, H.; Turan, Raşit; Oke, G.; Seyhan, A. (Informa UK Limited, 2007-01-01)
The current work describes a spectroscopic method for determining the electron temperature and electron density in an electron beam generator using argon spectral lines based on a collisional radiative model. Neutral and first-ionized Ar lines emitted from the electron beam generator are studied experimentally. A collisional radiative code was developed to simulate the Ar (I) and Ar (II) spectral emission and to compare the results with the experimental data for electron density and temperature determinatio...
Monte Carlo simulation of transport from an electrothermal vaporizer
Holcombe, James A.; Ertaş, Gülay (Elsevier BV, 2006-06-01)
Monte Carlo simulations were developed to elucidate the time and spatial distribution of analyte during the transport process from an electrothermal vaporizer to an inductively coupled plasma. A time-of-flight mass spectrometer was employed to collect experimental data that was compared with the simulated transient signals. Consideration was given to analyte transport as gaseous species as well as aerosol particles. In the case of aerosols, the simulation assumed formation of 5 nm particles and used the Ein...
Raman Spectroscopy Investigation of Nano Hydroxyapatite Doped with Yttrium and Fluoride Ions
Yilmaz, Bengi; Evis, Zafer (Informa UK Limited, 2014-01-02)
In this study, nano hydroxyapatite doped with yttrium (2.5, 5, and 7.5mol%) and fluoride (2.5mol%) ions were synthesized by precipitation method and sintered at 900 degrees C, 1100 degrees C, and 1300 degrees C. Raman spectroscopy was applied to track the structural modifications in pure and doped hydroxyapatites. The results showed that the main characteristic band of pure hydroxyapatite at 963cm(-1) was not affected significantly by ion doping but exhibited higher intensity with increasing sintering tempe...
Citation Formats
G. Ertaş, “Determination of absolute transport efficiencies of Be, Cd, In, Pb and Bi for electrothermal vaporization sample introduction into an inductively coupled plasma using an in-line electrostatic precipitator,” SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, pp. 1597–1612, 2003, Accessed: 00, 2020. [Online]. Available: