TY - JOUR A1 - Gusarova, Tamara A1 - Hodoroaba, Vasile-Dan A1 - Matschat, Ralf A1 - Kipphardt, Heinrich A1 - Panne, Ulrich T1 - Exploitation of the hollow cathode effect for sensitivity enhancement of Grimm-type DC glow discharge optical emission spectroscopy JF - Journal of analytical atomic spectrometry N2 - The hollow cathode (HC) effect was investigated in non-cooled 15 mm deep drilled flat metallic analytical samples that were easy to prepare. The deep cavity used ("complete HC" in contrast to "recessed HC" with 2-3 mm deep cavity) intensified the HC effect notably and therefore distinctly improved the detection power of the common GD-OES with planar cathodes. A signal enhancement of up to a factor of 150, not reported earlier, in comparison with flat conventional samples was achieved. A better separation of the analytical lines from spectral interferences was observed when the HC assembly was applied. Additionally, an effect of strongly enhanced intensities of atomic lines and somewhat decreased intensities of ionic lines was detected in the case of HC in comparison to usual planar cathodes. The investigations were carried out with samples of copper, steel and zinc matrices using both the same and individually optimised glow discharge (GD) electrical parameters. KW - Hollow cathode KW - Grimm type glow discharge KW - Emission spectroscopy KW - GD-OES KW - Sensitivity PY - 2009 DO - https://doi.org/10.1039/b814977a SN - 0267-9477 SN - 1364-5544 VL - 24 SP - 680 EP - 684 PB - Royal Society of Chemistry CY - London AN - OPUS4-19600 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gusarova, Tamara A1 - Hodoroaba, Vasile-Dan A1 - Matschat, Ralf A1 - Panne, Ulrich T1 - Enhancement of signal sensitivity in optical emission spectroscopy by coupling a grimm type glow discharge with hollow cathode T2 - ANAKON 2007 T2 - ANAKON 2007 CY - Jena, Germany DA - 2007-03-27 PY - 2007 AN - OPUS4-14640 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gusarova, Tamara A1 - Hodoroaba, Vasile-Dan A1 - Matschat, Ralf A1 - Panne, Ulrich T1 - Enhancement of signal sensitivity in glow discharge optical emission spectroscopy by use of the hollow cathode effect for the analysis of pure metals T2 - 2007 European Winter Conference on Plasma Spectrochemistry T2 - 2007 European Winter Conference on Plasma Spectrochemistry CY - Taormina, Italy DA - 2007-02-18 PY - 2007 AN - OPUS4-14639 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gusarova, Tamara A1 - Lange, Britta A1 - Kipphardt, Heinrich A1 - Matschat, Ralf A1 - Panne, Ulrich T1 - Comparison of different quantification procedures in glow discharge mass spectrometry applied to high-purity metals T2 - 2007 European Winter Conference on Plasma Spectrochemistry T2 - 2007 European Winter Conference on Plasma Spectrochemistry CY - Taormina, Italy DA - 2007-02-18 PY - 2007 AN - OPUS4-13680 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gusarova, Tamara A1 - Hofmann, T. A1 - Kipphardt, Heinrich A1 - Venzago, C. A1 - Matschat, Ralf A1 - Panne, Ulrich T1 - Comparison of different calibration strategies for the analysis of zinc and other pure metals by using the GD-MS instruments VG 9000 and element GD JF - Journal of analytical atomic spectrometry N2 - Synthetic pressed metal powder standards doped with standard solutions were used for the calibration of both commercially available high resolution GD-MS instruments Element GD and VG 9000 for zinc matrix. Different quantification procedures (IBR, Standard RSF, matrix matched RSF from the calibration with CRMs and use of doped synthetic standards) are compared using zinc matrix as an example, whereas the calibration with doped pellets turned out to be the best quantification technique for high-purity materials. The applicability of the Standard RSF concept is scrutinised. In this context, RSF values for several Matrices (Co, Cu, Fe, In and Zn) are reported additionally. PY - 2010 DO - https://doi.org/10.1039/b921649a SN - 0267-9477 SN - 1364-5544 VL - 25 SP - 314 EP - 321 PB - Royal Society of Chemistry CY - London AN - OPUS4-22376 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gusarova, Tamara A1 - Methven, B. A1 - Kipphardt, Heinrich A1 - Sturgeon, R. A1 - Matschat, Ralf A1 - Panne, Ulrich T1 - Calibration of double focusing glow discharge mass spectrometry instruments with pin-shaped synthetic standards JF - Spectrochimica acta B N2 - Calibration of two commercially available glow discharge double focusing mass spectrometers, the VG 9000 and Element GD, is described using synthetic pin standards pressed from solution doped copper and zinc matrices. A special pressing die was developed for this purpose and optimal results were obtained with the highest possible pressures, i.e., 95 kN·cm- 2. This calibration approach permits the determination of trace element mass fractions down to µg·kg- 1 with small uncertainties and additionally provides traceability of the GD-MS results in the most direct manner to the SI (International System of Units). Results were validated by concurrent measurements of a number of compact copper and zinc certified reference materials. The impact of the sample pin cross-section (circular or square) was investigated with the use of a new pin-sample holder system for the Element GD. The pin-sample holder was designed by the manufacturer for pin-samples having circular cross-section; however, samples with square pin cross-section were also shown to provide acceptable results. Relative Sensitivity Factors for some 50 analytes in copper (VG 9000, Element GD) and zinc matrices (VG 9000) are presented. The field of applicability of GD-MS may be considerably extended via analysis of pin geometry samples based on their ease of preparation, especially with respect to the accuracy and traceability of the results and the enhanced number of analytes which can be reliably calibrated using such samples. KW - Glow discharge KW - Pin sample KW - Calibration PY - 2011 DO - https://doi.org/10.1016/j.sab.2011.12.001 SN - 0584-8547 SN - 0038-6987 VL - 66 IS - 11-12 SP - 847 EP - 854 PB - Elsevier CY - Amsterdam AN - OPUS4-25346 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gusarova, Tamara A1 - Lange, Britta A1 - Methven, B. A1 - Hoffmann, T. A1 - Kipphardt, Heinrich A1 - Matschat, Ralf A1 - Venzago, C. A1 - Sturgeon, R. A1 - Panne, Ulrich T1 - Calibration of DC GD-MS with synthetic standards T2 - ANAKON 2009 T2 - ANAKON 2009 CY - Berlin, Germany DA - 2009-03-17 PY - 2009 AN - OPUS4-18989 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gusarova, Tamara A1 - Lange, Britta A1 - Matschat, Ralf A1 - Panne, Ulrich T1 - Analysis of high purity zinc by glow discharge mass spectrometry for use in thermometry T2 - 13th International Conference on ultra high-purity base metals T2 - 13th International Conference on ultra high-purity base metals CY - Berlin, Germany DA - 2006-09-11 PY - 2006 AN - OPUS4-13485 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gusarova, Tamara A1 - Lange, Britta A1 - Kipphardt, Heinrich A1 - Matschat, Ralf A1 - Panne, Ulrich T1 - Analysis of high purity zinc by glow discharge mass spectrometry for use in thermometry T2 - Euromet Workshop -732 / LNE - INM T2 - Euromet Workshop -732 / LNE - INM CY - Paris, France DA - 2006-11-23 PY - 2006 AN - OPUS4-13497 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -