Studying electrical conductivity and proline content in angelica honey to confirm its botanical origin

The aim of the study is to standardize the physicochemical quality indicators of angelica honey, characterizing its botanical origin – electrical conductivity and proline content in honey. The objects of research are 45 samples of angelica honey (collected in 2016–2020) from different regions of Kuzbass and Altai. Honey studies were carried out in an accredited laboratory of the Federal Research and Certification Center LLC (Perm). The methods of systematization, analysis and generalization were used. The obtained data were also compared with the results of angelica honey analyzes previously carried out by other authors in other laboratories. The studies cover different periods of honey collection, which increases the reliability of the results. The quality indicators (electrical conductivity and proline content in honey) are influenced by the botanical composition of honey, the type of honey plant and the natural and climatic conditions of the region, which is consistent with the data of most studies. The conducted studies of electrical conductivity and proline content in honey allowed us to establish standardized ranges of these physicochemical quality indicators for monofloral angelica honey. The proline content in the studied samples of angelica honey is 3–5 times higher than the standardized GOST values. Angelica honey is characterized by a high proline content – 350819.4 mg/kg. The electrical conductivity of angelica honey is within the range of 0.40–0.65 mS/cm and meets the requirements of GOST 197922017 "Natural honey. Specifications". Angelica honey is a dark honey with a high content of minerals. The established quality indicators for electrical conductivity and the mass fraction of proline in honey can be used in the future to confirm the botanical origin of angelica honey and identify its botanical adulteration. The obtained physicochemical quality indicators of angelica honey electrical conductivity and the mass fraction of proline in honey were taken as a basis for the development of STO 0135361486001 "Natural monofloral angelica honey". It is necessary to continue the study of other physicochemical quality indicators of angelica honey specified in GOST 317662022 "Monofloral honeys. Specifications".