The use of concomitant elements to evaluate an Ar-N-2 mixed-gas plasma by electrothermal vaporization inductively coupled plasma orthogonal time-of-flight mass spectrometry

Balsanek, William J.
Ertaş, Gülay
Holcombe, James A.
The performance of an Ar-N-2 mixed-gas plasma was compared to an At plasma using electrothermal vaporization as a sample introduction source to an inductively coupled plasma orthogonal time-of-flight mass spectrometer. The effect of sample matrices NaNO3 and Pd(NO3)(2) on a multi-element solution was investigated in mass amounts ranging from 0.1 to 5 mu g of the metal matrix (e.g., Na and Pd). Addition of 2% N-2 to the outer plasma gas of an Ar plasma reduced signal suppressions observed in the presence of high concentrations of Na and Pd at the expense of a large reduction in analyte sensitivity (ca. 83%). Signal profiles indicate that suppression may be caused, in part, by space charge effects that are dependent on the ion density of analyte and matrix ions. By reducing the magnitude of the signal from the N-2-free plasma by repositioning the torch away from the sampling cone, comparable immunity to excess matrix was observed when compared to a plasma with N-2 included in the outer plasma gas.


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...
2-D analysis of Ge implanted SiO(2) surfaces by laser-induced breakdown spectroscopy
Yalcin, Serife; Oerer, Sabiha; Turan, Raşit (Elsevier BV, 2008-10-01)
2-D elemental distribution of Ge in silicon oxide substrates with differing implantation doses of between 3x10(16) cm(-2) and 1.5x10(17) cm(-2) has been investigated by Laser-induced Breakdown Spectroscopy (LIBS). Spectral emission intensity has been optimized with respect to time, crater size, ablation depth and laser energy. Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM) coupled with Energy-Dispersive X-Ray Spectroscopy (EDX) have been utilized to obtain crater depth, morphology and ...
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.
Interactions of tamoxifen with distearoyl phosphatidylcholine multilamellar vesicles: FTIR and DSC studies
Bilge, Duygu; ŞAHİN, İPEK; KAZANCI, NADİDE; Severcan, Feride (Elsevier BV, 2014-09-15)
Interactions of a non-steroidal antiestrogen drug, tamoxifen (TAM), with distearoyl-sn-glycero-3-phosphatidylcholine (DSPC) multilamellar liposomes (MLVs) were investigated as a function of drug concentration (1-15 mol%) by using two noninvasive techniques, namely Fourier transform infrared (FTIR) spectroscopy and differential scanning calorimetry (DSC). FTIR spectroscopy results show that increasing TAM concentrations (except 1 mol%) increased the wavenumbers of the CH2 stretching modes, implying an disord...
Development of sensitive analytical methods for the determination of thallium at trace levels by slotted quartz tube flame atomic absorption spectrometry
Ari, Betul; BAKIRDERE, Sezgin; Ataman, Osman Yavuz (Elsevier BV, 2020-09-01)
A simple, sensitive and economical technique is needed for the determination of thallium and this study demonstrates the different analytical strategies were developed using atomic absorption spectrometry (AAS). In order to improve the sensitivity of flame atomic absorption spectrometry (FAAS), a basic slotted quartz tube (SQT) was used for the thallium determination. In the first strategy, mixing propanol (100 mu L) and Tl standard solution (500 mu L) under the optimum conditions, namely solvent assisted S...
Citation Formats
W. J. Balsanek, G. Ertaş, and J. A. Holcombe, “The use of concomitant elements to evaluate an Ar-N-2 mixed-gas plasma by electrothermal vaporization inductively coupled plasma orthogonal time-of-flight mass spectrometry,” SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, pp. 732–742, 2006, Accessed: 00, 2020. [Online]. Available: