Izvestiya of Saratov University.

Chemistry. Biology. Ecology

ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)

Full text:
(downloads: 140)
Article type: 

Preconcentration of Е110 and Е124 Food Azodyes on Magnetite Nanoparticles Modified by CTAB

Kazimirova Ksenia Olegovna, Saratov State University
Khabibullin Vladislav Rafaelevich, Saratov State University
Reshetnikova Irina Sergeevna, Saratov State University
Egunova Olga Romanovna, Saratov State University
Shtykov Sergey N., Saratov State University

Synthetic azodyes are widely used in paint, textile, plastic, and food, beverage, and leather, cosmetic, pharmaceutical and paper industries to make products more visually attractive to consumers. Therefore, they are also the components of waste waters and should be removed due to their potential risk to human health. Many techniques have been employed to eliminate dyes from waste water and do to preconcen- tration before analysis in food or beverage objects. One of the most popular and effective is magnetic solid-phase extraction (MSPE) with the use of magnetic nanoparticles (MNP). The aim of this work was the synthesis of magnetite nanoparticles, their modification and application to sorption and preconcentration of two widely used food azodyes E110 and E124. Superparamagnetic magnetite MNP were synthesized by co-precipitation of Fe(III) and Fe(II) 2:1 salts and then their surface was modified with cetyltrimethylammonium bromide (CTAB) to improve the stability of MNP and their adsorption properties with respect to azodyes containing sulphonic groups. The effect of various experimental factors: the pH of solution, the influence of concentration, the contact time and the quantity of the MNP sample were studied by using the batch technique. The characterization of the shape, charge, size of MNP and surface modification was performed by dynamic light scattering (DLS), transmittance electron microscopy (TEM) and XRD methods. It was established that the sizes of all MNP modified by CTAB were varied between 8±2 nm with the shell thickness about 1.0±0.1 nm. It was found that positive zeta-potential of modified MNP was at pH 3–6 and the highest extent of sorption (95–99%) of the both azodyes was at pH 5, 3.2 mg of MNP within dyes concentration in water less than 1.10-5 M. 


1. Смирнов Е. В. Пищевые красители : справочник. СПб. : Профессия, 2009. 352 с.
2. Rovina K., Prabakaran P. P., Siddiquee Sh., Md Shaarani Sh. Methods for the analysis of Sunset Yellow FCF (E110) in food and beverage products – a review // Trends Anal. Chem. B. 2016. Vol. 85. P. 47–56.
3. Шестопалова Н. Б., Петрович М. В., Чернова Р. К. Определение синтетических пищевых красителей Е102 и Е110 при совместном присутствии // Изв. Сарат. ун-та. Нов. сер. Сер. Химия. Биология. Экология. 2016. Т. 16, вып. 3. С. 247–253.
4. Baldikova E., Safarikova M., Safarik I. Organic dyes removal using magnetically modified rye straw // J. Magn. Mater. 2015. Vol. 380. P. 181–185.
5. Hemmateenejad B., Walker J.M. Solid-phase extractionand simultaneous determination of trace amounts of sulphonated and azo sulphonated dyes using microemulsionmodified-zeolite and multivariate calibration // Talanta. 2008. Vol. 75. P. 904–915.
6. Pourreza N., Rastegarzadeh S., Larki A. Determination of Allura red in food samples after cloud point extraction using mixed micelles // Food Chemistry. 2011. Vol. 126. P. 1465–1469.
7. Чернова Р. К., Шестопалова Н. Б., Козлова Л. М. Некоторые аспекты влияния электролитов на фазовое разделение и «CLOUD POINT» экстракцию азорубина в системе (ОП-10)-Н2О // Изв. Сарат. ун-та. Нов. сер. Сер. Химия. Биология. Экология. 2012. Т.12, вып. 4. С. 11–16.
8. Аль-Саиди М. З. Т., Штыков С. Н. Фотометрическое определение двух пищевых азокрасителей с применением мицеллярной экстракции в смешанных мицеллах тритона Х-100 и хлорида цетилпиридиния // Современные проблемы теоретической и экспериментальной химии : межвуз. сб. науч. тр. X Всерос. конф. молодых ученых с междунар. участием. Саратов : Сарат. источник, 2015. С. 29–31.
9. Егунова О. Р., Константинова Т. А., Штыков С. Н. Магнитные наночастицы магнетита в разделении и концентрировании // Изв. Сарат. ун-та. Нов. сер. Сер. Химия. Биология. Экология. 2014. Т. 14, вып. 4. С. 27–34.
10. Егунова О. Р., Решетникова И. С., Герман С. В., Казимирова К. О., Хабибуллин В. Р., Желобицкая Е. А., Штыков С. Н. Сорбционно-флуориметрическое определение энрофлоксацина с применением наночастиц магнетита, модифицированных полиэтиленимином // Изв. Сарат. ун-та. Нов. сер. Сер. Химия. Биология. Экология. 2016. Т. 16, вып. 1. С. 48–52.