All Stories

  1. Centrifuge-Less Mixed Micelle-Mediated Cloud Point Extraction-Spectrophotometric Determination of Vanadium Using 4-Nitrocatechol and Cetylpyridinium Chloride

    Article • International Journal of Molecular Sciences, June 2025, MDPI AG

    Dr. Kiril B Gavazov

  2. An Ionic Liquid-Assisted Mixed Micelle-Mediated Centrifuge-Less Cloud Point Extraction Spectrophotometric Method for the Determination of Molybdenum(VI)

    Article • International Journal of Molecular Sciences, May 2025, MDPI AG

    Dr. Kiril B Gavazov

  3. A Semi-Micro Extraction Spectrophotometric Determination of Iron Using 4-Nitrocatechol and Xylometazoline Hydrochloride

    Article • Molecules, February 2025, MDPI AG

    Dr. Kiril B Gavazov

  4. Extraction System for the Spectrophotometric Determination of Tungsten(VI) with 4-Nitrocatechol and Benzalkonium Chloride

    Article • Acta Chimica Slovenica, September 2024, Slovenian Chemical Society

    Dr. Kiril B Gavazov

  5. Mono- and Binuclear Complexes in a Centrifuge-Less Cloud-Point Extraction System for the Spectrophotometric Determination of Zinc(II)

    Article • Molecules, September 2024, MDPI AG

    Dr. Kiril B Gavazov

  6. Mono- and Binuclear Complexes in a Centrifuge-Less Cloud Point Extraction System for the Spectrophotometric Determination of Zinc(II)

    Article • September 2024, MDPI AG

    Dr. Kiril B Gavazov

  7. Synthesis, Characterization, and Cytotoxicity Evaluations of Silver–Zeolite Nanocomposite

    Article • Coatings, May 2024, MDPI AG

    Dr. Kiril B Gavazov

  8. Does Sendivogius’ Alchemy Cancel the Celebration of the 250th Anniversary of the Discovery of Oxygen?

    Article • Chemistry-Didactics-Ecology-Metrology, December 2023, De Gruyter

    Dr. Kiril B Gavazov

  9. Extractive Spectrophotometric Determination and Theoretical Investigations of Two New Vanadium(V) Complexes

    Article • Molecules, September 2023, MDPI AG

    Dr. Kiril B Gavazov

  10. Vanadium-Containing Anionic Chelate for Spectrophotometric Determination of Hydroxyzine Hydrochloride in Pharmaceuticals

    Article • Molecules, March 2023, MDPI AG

    Dr. Kiril B Gavazov

  11. A Sensitive Spectrophotometric Determination of Silver (I) with Blue Tetrazolium Chloride

    Article • Journal of the chemical society of pakistan, January 2023, Chemical Society of Pakistan

    Dr. Kiril B Gavazov

  12. Use of a Hydrophobic Azo Dye for the Centrifuge-Less Cloud Point Extraction–Spectrophotometric Determination of Cobalt

    Article • Molecules, July 2022, MDPI AG

    Dr. Kiril B Gavazov

  13. Spectrophotometric Determination of Molybdenum(VI) as a Ternary Complex with 4-Nitrocatechol and Benzalkonium Chloride

    Article • Molecules, February 2022, MDPI AG

    Dr. Kiril B Gavazov

  14. A centrifuge-less cloud point extraction-spectrophotometric determination of copper(II) using 6-hexyl-4-(2-thiazolylazo)resorcinol

    Article • Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, December 2021, Elsevier

    Dr. Kiril B Gavazov

  15. Extraction-Spectrophotometric and Theoretical Studies on a Ternary Complex Obtained from Vanadium(V) and 4-Nitrocatechol

    Article • Russian Journal of Inorganic Chemistry, December 2021, Pleiades Publishing Ltd

    Dr. Kiril B Gavazov

  16. An environmentally friendly cloud point extraction–spectrophotometric determination of trace vanadium using a novel reagent

    Article • Journal of Molecular Liquids, July 2021, Elsevier

    Dr. Kiril B Gavazov

  17. Extraction-Chromogenic System for Cobalt Based on 5-Methyl-4-(2-thiazolylazo) Resorcinol and Benzalkonium Chloride

    Article • Acta Chimica Slovenica, March 2021, Slovenian Chemical Society

    Dr. Kiril B Gavazov

  18. Extraction-Chromogenic Systems for Gallium(III) Based on Azo Dyes and Xylometazoline Hydrochloride

    Article • Russian Journal of General Chemistry, July 2020, Pleiades Publishing Ltd

    Dr. Kiril B Gavazov

  19. Extraction-Chromogenic System for Nickel(II) Based on 5-methyl-4-(2-thiazolylazo)resorcinol and Aliquat 336

    Article • Acta Chimica Slovenica, March 2020, Slovenian Chemical Society

    Dr. Kiril B Gavazov

  20. Extraction of Gallium(III) with a New Azo Dye in The Presence or Absence of Xylometazoline Hydrochloride

    Article • Croatica Chemica Acta, January 2020, Croatian Chemical Society

    Dr. Kiril B Gavazov

  21. A simple cloud point extraction-spectrophotometric method for total vanadium determination using 4-(2-thiazolylazo)resorcinol and H2O2

    Article • Chemical Papers, December 2019, Springer Science + Business Media

    Dr. Kiril B Gavazov

  22. Extraction-Chromogenic Systems for Vanadium(V) Based on Azo Dyes and Xylometazoline Hydrochloride

    Article • Acta Chimica Slovenica, December 2019, Slovenian Chemical Society

    Dr. Kiril B Gavazov

  23. Extraction-Chromogenic System for Silver(I) Based on Tetrazolium Violet and Semicarbazide Hydrochloride

    Article • Russian Journal of General Chemistry, October 2019, Pleiades Publishing Ltd

    Dr. Kiril B Gavazov

  24. Complex formation in a liquid-liquid extraction-chromogenic system for vanadium(IV)

    Article • Open Chemistry, September 2019, De Gruyter

    Dr. Kiril B Gavazov

  25. Liquid-phase microextraction: update May 2016 to December 2018

    Article • Applied Spectroscopy Reviews, May 2019, Taylor & Francis

    Dr. Kiril B Gavazov

  26. Recent advances in the application of nanoparticles in cloud point extraction

    Article • Journal of Molecular Liquids, May 2019, Elsevier

    Dr. Kiril B Gavazov

  27. Liquid-Liquid Extraction-Chromogenic System for Vanadium(V) Based on 4-(2-thiazolylazo)orcinol (TAO) and Aliquat 336

    Article • Acta Chimica Slovenica, December 2018, Slovenian Chemical Society

    Dr. Kiril B Gavazov

  28. Complex Formation in a Liquid-Liquid Extraction System Containing Vanadium(IV/V), 2,3-Dihydroxynaphtahlene and Thiazolyl Blue

    Article • June 2018, Slovenian Chemical Society

    Dr. Kiril B Gavazov

  29. A green cloud-point extraction-chromogenic system for vanadium determination

    Article • Journal of Molecular Liquids, December 2017, Elsevier

    Dr. Kiril B Gavazov

  30. Vortex-assisted liquid-liquid microextraction procedure for iodine speciation in water samples

    Article • Microchemical Journal, May 2017, Elsevier

    Dr. Kiril B Gavazov

  31. LIQUID-LIQUID EXTRACTION-SPECTROPHOTOMETRIC DETERMINATION OF MOLYBDENUM USING o-HYDROXYTHIOPHENOLS

    Article • JOURNAL OF ADVANCES IN CHEMISTRY, April 2017, CIRWOLRD

    Dr. Kiril B Gavazov

  32. Application of 4-(2-pyridylazo)resorcinol for flotation-spectrophotometric determination of iron

    Article • Bulletin of the Chemical Society of Ethiopia, January 2017, African Journals Online (AJOL)

    Dr. Kiril B Gavazov

  33. A two-in-one device for online monitoring of direct immersion single-drop microextraction: an optical probe as both microdrop holder and measuring cell

    Article • RSC Advances, January 2017, Royal Society of Chemistry

    Dr. Kiril B Gavazov

  34. A 2:2:2 Complex of Vanadium(V) with 4-(2-Thiazolylazo)orcinol and 2,3,5-Triphenyl-2H-Tetrazolium Chloride

    Article • June 2016, Slovenian Chemical Society

    Dr. Kiril B Gavazov

  35. Specific features of tetranitrotetrazolium blue chloride as an extraction reagent for iron(III)

    Article • Russian Journal of General Chemistry, May 2016, Pleiades Publishing Ltd

    Dr. Kiril B Gavazov

  36. An extraction-chromogenic system for vanadium(IV,V) based on 2,3-dihydroxynaphtahlene

    Article • Open Chemistry, January 2016, De Gruyter

    Dr. Kiril B Gavazov

  37. Extraction-spectrophotometric and theoretical (Hartree-Fock) investigations of a ternary complex of iron(II) with 4-nitrocatechol and 2,3,5-triphenyl-2H-tetrazolium

    Article • Russian Journal of General Chemistry, August 2015, Pleiades Publishing Ltd

    Dr. Kiril B Gavazov

  38. Extraction-Chromogenic Systems Containing Iron(III), 4-(2-Thiazolylazo)resorcinol and Ditetrazolium Salts

    Article • Oriental Journal Of Chemistry, June 2015, Oriental Scientific Publishing Company

    Dr. Kiril B Gavazov

  39. Liquid-Liquid Extraction-Chromogenic Systems Containing Iron(III), 4-Nitrocatechol and Tetrazolium Salts

    Article • Oriental Journal Of Chemistry, March 2015, Oriental Scientific Publishing Company

    Dr. Kiril B Gavazov

  40. Liquid–liquid extraction and cloud point extraction for spectrophotometric determination of vanadium using 4-(2-pyridylazo)resorcinol

    Article • Chemical Papers, January 2015, Springer Science + Business Media

    Dr. Kiril B Gavazov

  41. Ion-association between some ditetrazolium cations and anions originated from 4-(2-thiazolylazo)resorcinol or 4-(2-pyridylazo)resorcinol

    Article • Russian Journal of General Chemistry, January 2015, Pleiades Publishing Ltd

    Dr. Kiril B Gavazov

  42. Ground- and excited-state stability of the conformers of 3,5-dinitrocatechol and its complexes with W(VI) and V(V): combined theoretical and experimental study

    Article • Journal of Molecular Modeling, December 2014, Springer Science + Business Media

    Dr. Kiril B Gavazov

  43. Extraction-Spectrophotometric Studies on the Complex Formation of Iron(III) with 4-(2-Thiazolylazo)Resorcinol and Tetrazolium Salts

    Article • JOURNAL OF ADVANCES IN CHEMISTRY, April 2014, CIRWOLRD

    Dr. Kiril B Gavazov

  44. Liquid-Liquid Extraction-Spectrophotometric Investigations of Three Ternary Complexes of Vanadium(V)

    Article • Croatica Chemica Acta, January 2014, Croatian Chemical Society

    Dr. Kiril B Gavazov

  45. ChemInform Abstract: Nitroderivatives of Catechol: From Synthesis to Application

    Article • ChemInform, September 2013, Wiley

    Dr. Kiril B Gavazov

  46. Phenylmethoxybis(tetrazolium) ion-association complexes with an anionic indium(III) — 4-(2-pyridylazo)resorcinol chelate

    Article • Open Chemistry, January 2013, De Gruyter

    Dr. Kiril B Gavazov

  47. Complex Formation in a Liquid-Liquid Extraction System Containing Cobalt(II), 4-(2-Pyridylazo)resorcinol, and Nitron

    Article • Journal of Materials, January 2013, Hindawi Publishing Corporation

    Dr. Kiril B Gavazov

  48. Extraction-spectrophotometric investigations on two ternary ion-association complexes of gallium(III)

    Article • Open Chemistry, January 2012, De Gruyter

    Dr. Kiril B Gavazov

  49. Some Ternary Phenylmethoxybis(tetrazolium) Complexes of Vanadium(IV,V) and Their Constants of Association

    Article • Croatica Chemica Acta, January 2012, Croatian Chemical Society

    Dr. Kiril B Gavazov

  50. Ternary ion-association complexes between the indium(III) - 4-(2-pyridylazo)resorcinol anionic chelate and some tetrazolium cations

    Article • Open Chemistry, January 2011, De Gruyter

    Dr. Kiril B Gavazov

  51. Ternary complexes of vanadium(IV) with 4-(2-pyridylazo)-resorcinol (PAR) and ditetrazolium chlorides (DTC)

    Article • Open Chemistry, January 2010, De Gruyter

    Dr. Kiril B Gavazov

  52. Extraction equilibria and spectrophotometric determination of vanadium(V) with 4-nitrocatechol and the ion-pair reagent thiazolyl blue tetrazolium

    Article • Journal of Analytical Chemistry, January 2010, Pleiades Publishing Ltd

    Dr. Kiril B Gavazov

  53. Extraction-Spectrophotometric Studies on the Ion-Pairing Between Some 2,3,5-Substituted Monotetrazolium Cations and Anions Deriving from 4-(2-Thiazolylazo)resorcinol or 4-(2-Pyridylazo)resorcinol

    Article • JOURNAL OF ADVANCES IN CHEMISTRY, September 2009, CIRWOLRD

    Dr. Kiril B Gavazov

  54. Some tetrazolium salts and their ion-association complexes with the molybdenum(VI) — 4-nitrocatechol anionic chelate

    Article • Journal of Thermal Analysis and Calorimetry, March 2009, Springer Science + Business Media

    Dr. Kiril B Gavazov

  55. The Use of Tetrazolium Salts in Inorganic Analysis

    Article • ChemInform, July 2007, Wiley

    Dr. Kiril B Gavazov

  56. The use of tetrazolium salts in inorganic analysis

    Article • Russian Chemical Reviews, February 2007, Institute of Physics Publishing

    Dr. Kiril B Gavazov

  57. Ternary complex of molybdenum(VI) with 4-nitrocatechol and tetrazolium blue chloride and its application to extraction-spectrophotometric analysis of ferrous metallurgy products

    Article • Journal of Analytical Chemistry, February 2007, Pleiades Publishing Ltd

    Dr. Kiril B Gavazov

  58. The solvent extraction and spectrophotometric determination of vanadium (V) with 4-(2-thiazolylazo)resorcinol and tetrazolium salts

    Article • Open Chemistry, January 2007, De Gruyter

    Dr. Kiril B Gavazov

  59. Extraction-spectrophotometric study on the vanadium(V)-2,3-dihydroxynaphthalene — iodonitrotetrazolium chloride — water — chloroform system and its analytical application

    Article • Open Chemistry, January 2006, De Gruyter

    Dr. Kiril B Gavazov

  60. Application of a ternary complex of tungsten(VI) with 4-nitrocatechol and thiazolyl blue for extraction-spectrophotometric determination of tungsten

    Article • Chemical Papers, January 2006, Springer Science + Business Media

    Dr. Kiril B Gavazov

  61. Investigation of the extraction equilibrium of ion-association complexes of molybdenum (VI) with some polyphenols and thiazolyl blue. extraction-spectrophotometric determination of molybdenum

    Article • Open Chemistry, January 2005, De Gruyter

    Dr. Kiril B Gavazov

  62. Extraction spectrophotometric determination of vanadium in natural waters and aluminium alloys using pyridyl azo resorcinol (PAR) and iodo-nitro-tetrazolium chloride (INT)

    Article • Talanta, June 2000, Elsevier

    Dr. Kiril B Gavazov