Harmonization of methods for the analysis of disinfectants based on substances of guanidine derivatives and quaternary ammonium compoundsNosikova L.A., Kochetov A.N.
Nosikova L.A., Ph.D. (Chemistry), senior researcher A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences (IPCE RAS), (31, Leninsky Pr, Moscow, 119991, Russia); associate professor M.V. Lomonosov Institute of Fine Chemical Technologies, MIREA – Russian Technological University (86, Vernadskogo Pr., Moscow, 119571, Russia),
E ‑ m a i l :
nosikova_lyubov@mail.ru., Researher ID 679715. ORCID ID 0000‑0002‑4144‑5343
Kochetov A.N., Ph.D. (Chemistry),research engineer A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences (IPCE RAS), (31, LeninskyPr, Moscow, 119991, Russia); associate professor, A.N. Reformatskychair of inorganic chemistry, M.V. Lomonosov Institute of Fine Chemical Technologies, MIREA – Russian Technological University (86, Vernadskogo Pr., Moscow 119571, Russia), E ‑ m a i l :
kochchem@mail.ru., ResearherID 213376. ORCIDID 0000‑0002‑1911‑1718.
The regulatory and technical documentation for the analysis of quaternary ammonium compounds and guanidine derivatives is currently represented by a wide range of methods, including both outdated and, conversely, extremely complex in terms of instrumentation, exotic and expensive methods, such as NMR spectroscopy, mass spectrometry or the use of rare indicators and even precious metal nanoparticles that are difficult to access. The paper considers a large range of methodological approaches for the analysis of title substances, including their joint presence. New groups of these derivatives are regularly synthesized, and recently the emphasis has shifted towards oligomeric structures that are copolymers of the derivatives under consideration. Apparently, it is the departure towards the use of compositions from several homologues that is the most promising direction from the point of view of maximum efficiency. The path of searching for a highly active individual substance showing high bactericidal activity is very complex and has not led to success since the middle of the last century, giving way to compositions of homologues – cheaper and with an expanded spectrum of action. The use of such compositions requires that the method of their analysis allows determining individual homologs, significantly complicating the method of analysis, while the activity of such derivatives that are similar in structure does not differ much, which devalues information about the individual composition. It seems more rational to use not highly selective chromatographic approaches, but, on the contrary, group titrimetric methods adapted to the joint analysis of not only individual derivatives, but also copolymers or composites based on natural raw materials. Titrimetric methods are extremely robust, cheap and available to a wide range of research laboratories.
Keywords: QAС, titrimetry, spectrophotometry, disinfectants, reverse–phase HPLC, guanidine derivatives, PGMG, PGMBG, chlorhexidine bigluconate, disinfecting substances, myristamed, octenidine, copolymers.
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