A new chemiluminescence method for the determination of formaldehyde concentration in milk based on nanoporous aluminum oxide

Cow's milk has a mild pleasant smell, which is hard to describe; the taste is pleasant, slightly sweet and salty, which is caused by the chemical composition. Odorous carbonyl compounds is one of the main substances involved in the formation of odor, taste and flavor of milk. The strength and character of the odor of these compounds depend on their structure and concentration. The reasons for the presence of aldehydes in milk can be different, for example: the manifestation of the activity of carboxylase milk, which catalyze the decarboxylation reaction of many acids; the use of feed treated with formaldehyde; the use of formalin (40% formalde hyde solution) as a preservative of milk for longterm storage in natural conditions. Find simple ways to get new sorbents for sorption preconcentration of microcomponents and for the chromatographic separation remains an urgent task. Sorbents on the basis of aluminum oxide can be an alternative to the currently used for the separation and concentration of various substances organopolymers and silica sorbents. The aim of this work was to develop a method that enables high Express, precision and reproducibility to evaluate the content of formaldehyde in the vapor of milk. Method had to be easy to use and not too expensive. The article discusses a new method for the determination of formaldehyde in milk flavor. The essence of the method lies in the fact that the definition is carried out using nanostructured film of aluminum oxide (POA) with hexagonal structure of size 7'30 mm as a sorbent of formaldehyde from a gas environment to reduce the luminol-dependent chemiluminescence in a system generating hydroxyl radicals in the presence of formaldehyde. The conditions of film synthesis of nanoporous aluminum oxide is determined. The proposed method for the determination of formaldehyde in milk flavor is characterized by ease of preparation of samples for study, high reproducibility and relatively high speed of the analysis.

формальдегид, молоко, нанопористый оксид алюминия, сорбция, хемилюминес-ценция, formaldehyde, milk, nanoporous aluminum oxide, sorption, chemiluminescence

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