Naslov
Simple and Complex Surfactant Formulations Determination by Low-Cost Surfactant Direct Potentiometric Sensor

Autori
Sakač, Nikola ; Jozanović, Marija ; Kraševac Sakač, Marija ; Karnaš, Maja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
PortASAP Meeting – Book of Abstracts / Segundo, Marcela A. ; Tvarijonaviciute, Asta ; Psillakis, Elia Psillakis - Lahti : PortASAP - European network for the promotion of portable, affordable and simple analytical platforms, 2020, 26-26

ISBN
978-989-33-0399-3

Skup
PortASAP Meeting Wbe conference

Mjesto i datum
Kreta, Grčka, 18.06.2020. - 19.06.2020

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Direct potentiometry, Product formulations, Surfactants

Sažetak
Surfactants, or surface active agents lower the surface tension. They are widely used in everyday house products, for washing, cleaning, disinfection or as preservatives. There are mainly four types of surfactants ; anionic, cationic, nonionic and amphoteric. The most commonly used are different anionic surfactants (45%), but there is a high potential of the use of nonionic surfactant [1]. Generally, anionic surfactants are used in formulations for washing and cleaning, cationic are used as disinfection agents, amphoteric can be used in many different formulations since their charge and properties are highly depending on the pH, and nonionic surfactants that are used in formulations with anionic surfactants for washing and cleaning. Nonionic surfactants (NS) are generally less effective than anionic, but they cause much less skin irritations. For sample determinations we used a developed low- cost surfactant sensor based on the coated cooper wire with a sensing cocktail [2]. The sensing cocktail was made of a PVC, plasticizer, ionophore and a carbon MWCNTs. The measuring principle was a direct potentiometry and direct potentiometric titrations. The formulations of two and three component mixtures of anionic surfactants in titration with cationic surfactants were measured. The influence of the nature of the EONS (number of EO groups) at the fixed anionic/EONS ratio on the shapes of the titration curves for titrations of anionic with cationic surfactant was observed. The end-point potentiometric titration of EONS using sodium tetraphenylborate as the titrant for pure and technical grade EONS and polyethylene glycols was performed. The end-point potentiometric titrations for samples containing amphoteric surfactants were performed by pH adjustment. At the end, an end point direct potentiometric titration for determination of anionic surfactants in liquid, powder and gel commercial product formulation was performed.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

POVEZANOST RADA