Abstract
The study presented by the authors is devoted to the study of the properties and the possibility of using technical cellulose from non-wood plant raw materials as a solid-phase matrix to obtain solid-phase reactive indicator systems by the following methods: synthesis method on the base of a hetarylformazane immobilized on a cellulose matrix and development of analytical systems based on preconcentration of the determined metal ion by a matrix with subsequent its «revealing» by the formazan («revealing» method).
 The article focuses on determination of optimal combinations of chromogenic organic reagents (hetarylformazanes) and cellulose-based matrices for developing solid-phase reaction-based indicator systems. Adsorption features of formazan reagents onto cellulose matrices was studied. It has been established the relation between the reagent molecule structure, composition of cellulose matrix and analytical properties of the test-systems synthesized to determine metal ions. Different approaches were developed and applied to reveal the visually observable and easily measured effect due to cellulose properties as well as properties of hetarylformazanes fixed on the surface of the matrix. This fact allows to control sensitivity and selectivity of solid-phase reactive indicator systems for water quality assessment.
Highlights
Technical cellulose and its processed products are becoming more widespread as raw materials for the chemical, pharmaceutical, food, defense industries, as well as for solving environmental problems
It was found that when using «revealing» method by hetarylformazan solution, the time to develop the maximum chromogenic effect depends on a metal ion sorbed onto a cellulose matrix but on the nature of the formazan heterocycle as well
The combinations of chromogenic reagents and cellulose matrices presented in this paper allow regulating the sensitivity and selectivity of test-systems
Summary
Technical cellulose and its processed products are becoming more widespread as raw materials for the chemical, pharmaceutical, food, defense industries, as well as for solving environmental problems. Much attention is paid to obtaining affordable sorbents based on natural materials, the functional groups of which are capable to retain reagents on the surface for visual and coloristic determination of the content of metal ions in natural and waste waters [1]. The technical cellulose obtained from wood by the traditional method does not possess the required set of properties to obtain effective sorption materials, while cellulose from non-wood plant raw materials.
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