PL
Celem badań było oznaczenie zawartości witamin z grupy B: witaminy B₁, B₂, B₆ i PP we wszystkich dostępnych w 2013 roku na polskim rynku owsianych produktach bezglutenowych. Materiał doświadczalny stanowiło 7 owsianych produktów bezglutenowych, takich jak mąki i mieszanki do wypieku chleba i ciastek oraz płatki. Produkty poddano hydrolizie enzymatycznej z użyciem taka-diastazy oraz hydrolizie kwasowej z zastosowaniem kwasu solnego. Zawartość witamin z grupy B oznaczono metodami wysokosprawnej chromatografii cieczowej. Średnia zawartość witamin B₁, B₂, B₆ (jako sumy pirydoksalu, pirydoksaminy, pirydoksyny) oraz PP we wszystkich produktach wynosiła odpowiednio 0,184, 0,050, 0,159, 0,544 mg·100 g⁻¹ produktu. Największą zawartość witaminy B₁ stwierdzono w płatkach owsianych, a pozostałych witamin w musli owsianym z owocami. Owsiane produkty bezglutenowe charakteryzowały się zróżnicowaną zawartością witamin B₁, B₂, B₆ i PP. Najbogatszym źródłem analizowanych witamin były płatki owsiane oraz musli owsiane z owocami.
EN
Oat gluten-free products are a new category on the Polish market of foods for particular nutritional use. Oats which was the subject of numerous studies on its safety for use in the diet of patients with coeliac disease, was introduced on Polish market in 2012. Results of clinical trials in patients suffering from coeliac disease, indicate the occurrence of nutritional deficiencies, including deficiencies of B-group vitamins. Due to the fact that nutritional deficiencies refer both to the patients who do not comply with the recommendations, as well as to those on a gluten free diet, quality assessment of gluten-free food plays a significant role in the efficient treatment of coeliac disease. Oat products are an alternative to the commonly consumed cereal gluten-free products. The aim of this study was to determine the content of B-group vitamins: vitamin B₁, B₂, B₆ and PP in all glutenfree oat products available on the Polish market in 2013. Seven oat gluten-free products: flours, bread mixes, cookies mixes and flakes were purchased in the local health food stores. The concentration of B-group vitamins was determined by high performance liquid chromatography (HPLC) after prior enzymatic and acid extraction of sample. The content of thiamine ranged from 0.049 ±0.011 (oat mix for chocolate muffins) to 0.276 ±0.010 mg in 100 g of product (oat flakes) with a mean of 0.184 mg·100 g⁻¹. The most valuable source of vitamin B₂ was oat musli with fruits (0.085 ±0.001 mg·100 g⁻¹), the least valuable was gluten-free flour with oat (0.031 ±0.001 mg·100 g⁻¹). The average content of vitamin B₆ was 0.158 mg·100 g⁻¹ with the lowest content in gluten-free flour with oat (0.039 ±0.008 mg·100 g⁻¹) and the highest in oat musli with fruits (0.569 ±0.019 mg·100 g⁻¹). The niacin content in all selected products ranged from 0.269 ±0.023 (mix for oat cookies) to 1.084 ±0.103 mg·100 g⁻¹ (oat musli with fruits) with an average content of 0.544 mg in 100 g. High content of vitamins in oat muesli is a result of fruits content. Tested gluten-free products significantly differed in vitamin B₁, B₂, B₆ and niacin contents. The richest source of analyzed vitamins were oatmeal and oat muesli with fruits.