1. A kapacitiv csatolású plazma geometriájának az analitikai jelre. Fémmeghatározások ipari légszennyeződésekből

    2. T. Frenţiu, A. Fodor, Ana-Maria Rusu, Michaela Ponta şi E. A. Cordoş
    XXXVI Magyar Szinkepelemzo Vandorgyules. X Magyar Molekulaspektroszkopiai
    Konferencia, Kaposvar, Ungaria, 3 - 6 iulie, 1994,Vol. I,173-177

  2. Medium Power r.f. Coupled Plasma as Alternative Source in Atomic Spectroscopy

    A.M. Rusu, T. Frenţiu, M. Ponta şi E. Cordoş
    42 nd Hungarian Conference on Spectrochemistry, Veszprem, Ungaria, 28 – 30 iunie, 1999, 22 – 25.

  3. Profile distribution of As(III) and As(V) species in soil and groundwater in the mining affected area Baia Mare - Bozanta, Romania

    T. Frentiu, S. Vlad, M. Ponta, C. Baciu, I. Kasler, E. Cordos
    33rd International Conference of Slovak Society of Chemical Engineering, 22 – 26 mai,
    Tatranske Matliare, Slovacia, 212-1 – 212-8, ISBN 80 – 2409 – 2.

  4. Profile distribution of Heavy metals in soil and Their influence on groundwater quality in Bozanta-Sasar mining area, Romania

    5. T. Frentiu, S. Vlad, M. Ponta, C. Baciu, M. Postolache, E. Cordos
    33rd International Conference of Slovak Society of Chemical Engineering, 22 – 26 mai, Tatranske Matliare, Slovacia, 212-1 – 212-8, ISBN 80 – 2409 – 2.

  5. Trace and ultratrace analysis in liquids by atomic spectrometry. Comparative study between ICP-AES and ICP-MS techniques

    6. M. Senila, C. Roman, E. Konradi, T. Frentiu, E. Cordos
    33rd International Conference of Slovak Society of Chemical Engineering, 22 – 26 mai,
    Tatranske Matliare, Slovacia, 261-1 – 261-10, ISBN 80 – 2409 – 2.

  6. Preliminary Study On Soil Lead Pollution Around The Bozanta Mare Tailing Pond Using Tessier’s xtraction Scheme,

    Erika-Andrea Konradi, Michaela Ponta, Tiberiu Frentiu , Marin Senila, Cecilia Roman, Anca Mihaly Cozmuta, Emil Cordos
    Optical Techniques for Environmental Monitoring and Risk Assessment Summer School,
    OTEM 2006 , July 31, August 09, 2006 , Baia Mare, Romania
    Published by INOE 2006, ISBN (10) 973-85818-8-5; ISBN (13) 978-973-85818-8-3, p. 259-262

  7. Interlaboratory Study on Cu, Pb and Zn Determination in Soil by Inductively Coupled Plasma Optical Emission Spectrometry using the Bland and Altman Test

    8. Tiberiu Frentiu, Michaela Ponta, Erika Levei, Marin Senila, Monica Ursu, Emil Cordos,
    Optoelectronic Techniques for Environmental Monitoring and Risk Assessment, 21 - 24 May 2007, Bucharest, Romania, ISBN 978-973-86818-9-0, 228 – 239.

  8. Validation of the Tessier scheme for speciation of metals in soil using the Bland and Altman test.

    9. Tiberiu Frentiu, Michaela Ponta, Erika Levei, Emilia Gheorghiu, Iosif Kasler, Mirela Miclean, Emil Cordos,
    A 34-a Conferinţa Internaţională a Societăţii Slovace de Inginerie Chimică, Tatranske Matliare, Slovacia, 21-25 mai 2007, ISBN 978-80-227-2640.

  9. Figures of Merit of a Radiofrequency Capacitively Coupled Plasma in Atomic

  10. Fluorescenece Spectrometry,

    11. Emil Cordos, Tiberiu Frentiu, Eugen Darvasi, Michaela Ponta and Marin Senila,
    35 th International Conference of Slovak Society of Chemical Engineering, Tatranske
    Matliare, Slovacia, 26 - 30 mai 2008, ISBN, 978-80-227-2903- 1, pag. 098-1 – 098-8.

  11. Discharge Characteristics and Non-Spectral Interferneces in a Medium Power Radiofrequency Capacitively Coupled Plasma,

    12. Tiberiu Frentiu, Michaela Ponta, Emil Cordos,
    35 th International Conference of Slovak Society of Chemical Engineering,
    Tatranske Matliare, Slovacia, 26 - 30 mai 2008, ISBN, 978-80-227-2903-1, pag. 162-1 – 162-11.

  12. Study of Partitioning and Dynamic of Metals in Contaminated Soiul Using the Modified Four-Step BCR Sequential Extraction Procedure,

    13. Tiberiu Frentiu, Michaela Ponta, Erika Levei, Emil Cordos,
    35 th International Conference of Slovak Society of Chemical Engineering, Tatranske Matliare,
    Slovacia, 26 - 30 mai 2008, ISBN, 978-80-227-2903-1, pag. 103-1 – 103-26.

  13. Study of Cu, Pb, Zn and Cd Distribution in Soil in the Baia Mare Town and Surroundings Resulted from Anthropogenic Activities,

    14. Cecilia Roman, Erika Levei, Michaela Ponta, Tiberiu Frentiu, Mirela Miclean, Marin Senila, Emil Cordos,
    35 th International Conference of Slovak Society of Chemical Engineering, Tatranske Matliare,
    Slovacia, 26 - 30 mai 2008, ISBN, 978-80-227-2903-1, pag. 062-1 – 062-11.

  14. Fast Measurement Method of Lead Isotopic Ration in Meteoritic Material Using Quadrupole ICP-MS,

    15. Caludiu Tănăselia, Stanko Ilik-Popov, Dana Pop, Bela Abraham, Cecilia Roman, Emil Cordoş, Tiberiu Frenţiu, Trajce Stafilov, Leontin David,
    The 9th International Symposium on Metal Elements in Environment, Medicine and Biology, Cluj-
    Napoca, 16 – 17 Octombrie 2009, ISSN 1583-4204, Cluj University Press, Babeş-Bolyai
    University, Cluj-Napoca, Tome IX, pag. 154 – 156, Editori Gabriela Gârban, Ioan Silaghi-Dumitrescu.

  15. Determination of Dissolved Metals in Water Samples by Diffusion Gradients in Thin Films (DGT) Method,

    16. Marin Şenilă, Lăcrămioara Şenilă, Tiberiu Frenţiu, Michaela Ponta, Emil Cordoş, Luminiţa Silaghi-Dumitrescu,
    The 9th International Symposium on Metal Elements in Environment, Medicine and Biology, Cluj-
    Napoca, 16 – 17 Octombrie 2009, ISSN 1583-4204, Cluj University Press, Babeş-Bolyai
    University, Cluj-Napoca, Tome IX, pag. 157 – 61, Editori Gabriela Gârban, Ioan Silaghi-Dumitrescu.

  16. Plant Uptake Factors for 55 Elements in a Rural Mining Area, NW Romania,

    17. Mirela Miclean, Marin Şenilă, Cecilia Roman, Tiberiu Frenţiu, Emil Cordoş,
    The 9th International Symposium on Metal Elements in Environment, Medicine and Biology,
    Cluj-Napoca, 16 – 17 Octombrie 2009, ISSN 1583-4204, Cluj University Press, Babeş-
    Bolyai University, Cluj-Napoca, Tome IX, pag. 162 – 165, Editori Gabriela Gârban, Ioan Silaghi-Dumitrescu.

  17. Analytical Applications for A Radiofrequency Plasma Coupled with Tip-Ring Electrode Geometry

    18. E. A. Cordoş, T. Frenţiu, S. D. Anghel, Ana-Maria Rusu, A. Fodor, Michaela Ponta şi S. Negoescu
    Conferinţa de Chimie şi Inginerie Chimică, Universitatea Politehnică Bucureşti, oct.1995,
    Vol. III Partea a III a, 427-432

  18. The Study and The Optimization of Easy-Excitable Elements by A Radiofrequency Capacitively Coupled Plasma Source

    19. E. A. Cordoş, T. Frenţiu, S. D. Anghel, Ana-Maria Rusu, A. Fodor, Michaela Ponta şi S. Negoescu.
    Conferinţa de Chimie şi Inginerie Chimică, Universitatea Politehnică Bucureşti, oct.1995,
    Vol. III Partea a III a, 627-632

  19. Characteristic Temperatures and Electron Number Densities in An r.f. Capacitively Coupled Plasma

    20. S. D. Anghel, T. Frenţiu, E. Darvasi, Ana-Maria Rusu, A. Simon, and E. A. Cordoş
    Conferinţa de Chimie şi Inginerie Chimică, Universitatea Politehnică Bucureşti, oct.1995,
    Vol. III Partea a III a, 633-635

  20. The Analysis of Conductive Solid Samples by r.f. Capacitively Coupled Plasma at Atmospheric-Pressure

    21. S. D. Anghel, T. Frenţiu, Ana-Maria Rusu, Lucia Beşe şi E. A. Cordoş
    Conferinţa de Chimie şi Inginerie Chimică, Universitatea Politehnică Bucureşti, oct.1995,
    Vol. III Partea a III a, 636-638

  21. Soil polution assessment in the Baia Mare area after partial closure of ore processing activities,

Erika Levei, Roman Cecilia, Roman Marius, Ponta Michaela, Frentiu Tiberiu,
The 17th International Symposium on Analytical and environmental Problems, Szeged, Ungaria, 19 septembrie, 2011, 235 - 238.

   22. A digitaly controlled programmable power supply used in a vaporizer. 
R. Etz, D. Petreuş, T. Frenţiu, T. Pătărău, 
36th International Spring Seminar on Electronics Technology (ISSE 2013), 8 – 12 mai    
2013, Alba-Iulia, Romania, pag. 231 – 236, ISBN 978-606-613-064-6.
   23.  Determination of several hazardous/priority hazardous metals in environmental samples by CCP-AES, 
Alin I. Mihălţan, T. Frenţiu, M. Ponta, C. Măruţoiu
The International conference on Innovation and Collaboration in Engineering Research, 
INCER 2013, 20 – 21 iunie 2013, Bucureşti, Romania, pag. 9 – 12, ISSN 2344 – 1720.
  24.  Study and implementation of a vaporizer used in plasma equipment for heavy metals determination,
T. Pătărău, D. Petreuş, R. Etz, C. Orian, E. Darvasi, T. Frenţiu
19th Internationla Symposium for Design and Technology In Electronics Packacing,     
STIIME 2013, Galaţi, Romania, ISSN 2285 – 7109. 
   25.    Mercury speciation in soil using a 3-three step sequential extraction and detection by cold-vapor capacitively coupled plasma microtorch optical emission spectrometry, T. Frenţiu, E. Darvasi, M. Ponta, Alin. I. Mihălţan, S. Butaciu
The 19th International Symposium on Analytical and environmental Problems, Szeged, 
Ungaria, 23 septembrie, 2013, 64 -  67, ISBN 978-963-315-141-9.

    26. Microanalytical method based on electrothermal vaporization capacitively coupled plasma microtorch optical emission spectrometry for multielemental detrmination -comparison with inductively coupled plasma optical emission spectrometry

Frentiu T., Butaciu S., Darvasi E., Ponta M., Frentiu M., Petreus D.:
Editor: Markoš, J., In Proceedings of the 42nd International Conference of the Slovak Society of Chemical Engineering, Tatranské Matliare, Slovakia, 410–419, ISBN: 978-80-89597-35-2, EAN: 9788089597352, 2016.

    27. Electrothermal vaporization device for sample introduction in microplasma sources used  in elemental determination by optical emission spectrometry

Cadar S., Frentiu T., Darvasi E., Butaciu S., Ponta M., Frentiu M., Petreus D.:
Editor: Markoš, J., In Proceedings of the 42nd InternationalConference of the Slovak Society of Chemical Engineering, Tatranské Matliare, Slovakia, 420–426, ISBN: 978-80-89597-35-2, EAN: 9788089597352, 2016.