Moisture and Acidity as Indicators of the Quality of Honey Originating from Vojvodina Region (original) (raw)

Characterisation and Classification of Croatian Honey by Physicochemical Parameters

Food Technology and Biotechnology, 2008

The aim of this study is to characterise 8 different monofloral and multifloral types of Croatian honey (a total of 254 samples from 2003, 2004, and 2005 harvesting seasons) based on 11 common physicochemical parameters (water mass fraction, total reducing sugar mass fraction, sucrose mass fraction, ash mass fraction, electrical conductivity, acidity, diastase and invertase activity, hydroxymethylfurfural (HMF) mass fraction, proline mass fraction and optical rotation). Differences in the above-mentioned parameters, established among the honey samples, are influenced by different factors, such as botanical origin, climate and regional circumstances. After the sample characterisation, results obtained for 2 monofloral (acacia (Robinia pseudoacacia) and chestnut (Aesculus hippocastanum)), and 2 multifloral (floral and meadow) honey types were subjected to the pattern recognition procedures. In this regard, unsupervised methods such as cluster and principal component analyses were employed, with the goal of evaluating the possibility of differentiation of Croatian honey stemming from different botanical origins, based on their physicochemical profile. Cluster analysis (CA) revealed the existence of two clusters, in the first of which is acacia honey as the best grouped, and the second corresponds to the dispersed group constituted of the remaining three honey types under investigation (chestnut, floral, and meadow). Principal component analysis (PCA), i.e. its first two components, stood for the average of 50.5 % of the data variance. PCA and CA showed that physicochemical parameters are able to provide enough information to allow for the classification and distinction of the types of honey originating from four botanical origins under investigation (acacia, chestnut, floral and meadow).

Influence of Some Physicochemical Properties on the Quality of Honey

2020

One of the most important agricultural activities is certainly beekeeping, which significantly contributes to the preservation of biodiversity and the improvement of agricultural and, above all, fruit production. In its approach to the European Union, Bosnia and Herzegovina follows the trends and harmonizes its legal legislation in many segments that relate to agriculture and beekeeping as its very important segment. According to the available land per capita, Bosnia and Herzegovina does not lag behind European countries, because it has a great potential for agricultural production that has not been used. The application of legal norms in beekeeping production is the basis for success in production, as well as health and food quality. The primary goal of this study was to determine the influence of physicochemical properties on honey quality. Data collection was performed on the basis of honey analysis of four producers from the area of ​​Tuzla, Lukavac, Živinice and Bihac. The anal...

Characterisation of Serbian unifloral honeys according to their physicochemical parameters

Food Chemistry, 2012

The characterisation of three unifloral Serbian honeys (acacia, sunflower and linden) was carried out based on some common physicochemical parameters (water content, electrical conductivity, free acidity, optical rotation and pH). A total of 201 honey samples, collected during the 2009 harvesting season, were analysed. Principal component analysis (PCA) and linear discriminant analysis (LDA) were used to highlight the data structure and to find the relationships between the physicochemical parameters and the botanical origin of honey. The variables that best discriminated the samples were electrical conductivity (ranging from 0.10 to 0.76 mS/cm), free acidity (ranging from 7.80 to 42.70 meq/kg) and pH (ranging from 3.17 to 5.85). LDA resulted in a classification model with a high predictive power, allowing further assessment of unknown samples of the three unifloral honeys. Determination of geographic origin of acacia honey samples based on physicochemical properties and chemometrics was attempted.

Comparıson of Physıcal and Bıochemıcal Characterıstıcs of Dıfferent Qualıty of Turkish Honey

2013

Honey adulteration is a serious ethical problem and results in many losses such as in nutrition, health and economy. While adulteration of honey is very easy, it is difficult to determine it and requires troublesome techniques. The aim of the present study was to determine some physical and biochemical to differentiated parameters between the natural and adulterated with saccharose syrup honeys. Therefore, moisture, color, optical rotation, fructose, glucose, maltose, ribose, arabinose, proline, 5-hydroxymethlfurfural (HMF), total phenolic substances and total antioxidant capacities were measured to find any difference. Proline content, total amount of phenolic substances were found as important parameters that can be used to distinguish natural honey from that produced by over-feeding of bees with saccharine.

Assessment of Honey Quality from the Middle Podrinje Area

2021

The study aimed to examine the quality of honey from the Middle Podrinje area (Bosnia and Herzegovina). The research included a total of 21 samples of honey from the Middle Podrinje area: 12 samples of honey florals (municipalities of Srebrenica and Milici), 9 samples of acacia honey (municipalities of Zvornik and Bratunac). Physico-chemical parameters were determined as the main composition criteria for quality assessment in honey samples: mass fraction of water, total acidity, electrical conductivity, and ash. Samples of honey florals are of poorer quality compared to acacia honey, two samples had values of water content and acidity above the values prescribed by the Regulation. Statistical analysis showed that there is a statistically significant difference between the arithmetic means of the water content for floral honey, the electrical conductivity of acacia honey, and the free acid content for both types of honey. Honey samples that met the criteria prescribed by the Regulati...

Comparative analysis of honey quality from the area of Tuzla Canton-Bosnia and Herzegovina

International Journal of Food Science and Nutrition, 2021

Honey, as a natural food substance, has a significant role in economic and trade activities around the world. In Bosnia and Herzegovina, beekeeping is an opportunity for the development of rural areas, and an important factor in strengthening agriculture. The aim of this research is to compare the quality of different types of honey from two consecutive seasons. Honey samples were collected in Tuzla Canton in Bosnia and Herzegovina. Physico-chemical and sensory properties of honey were analyzed. The research was conducted according to standard methods for testing the honey quality, in accordance with the legislation on honey quality in Bosnia and Herzegovina. The results of dry matter content of honey samples are 80.50 to 82.60% (Brix), and the total acidity of honey is 12.40 to 43.97 mEq/kg of honey. The results of the water presence in honey range from 14.60 to 18.0%, and the conductivity ranged from 0.217 mS/cm to 1.425 mS/cm. The compliance of honey samples with the prescribed legislation on honey quality in Bosnia and Herzegovina has been determined, as well as the acceptability of honey samples in terms of sensory properties of honey.

Physico-Chemical and Melissopalynological Characterization of Czech Honey

Applied Sciences, 2021

Geographical and botanical origin of honeys can be characterized on the basis of physico-chemical composition, sensory properties and on the basis of melissopalynological analysis. No comprehensive description of the characteristics of Czech honey has been published so far. This study provides insights that are important for correct classification. The study analysed 317 samples of authentic honey from randomly selected localities. Due to the diversity of the landscape, the typical honey of the region is blend honey with a predominance of blossom honey. According to the pollen profile and electric conductivity, the honeys were sorted into the following: Brassica honey (BH), Floral honey (FH), Fruit tree honey (PH), Honeydew (HD), Lime tree honey (LH), Robinia pseudoacacia honey (RH), and Trifolium honey (TH). Physico-chemical properties, including higher carbohydrates, were determined for the honeys and their pollen profiles were examined. The physico-chemical properties and pollen ...

Physicochemical characterization of natural honeys from different regions in Slovakia

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2014

This study is intended to determine the physicochemical characteristics of Slovakian honeys, and compare them with specifi cations described in the Codex Alimentarius Standard, the European Honey directive, the Slovak Codex Alimentarius and Slovak standard No. 1/2006. In addition, we tried to fi nd out correlations between individual constituents of honeys. Physicochemical characterization was carried out following the harmonized methods dictated by the International Honey Commission IHC. Honey samples (n=50) were collected from three honey types (blossom, blends, honeydew), and from the three main Slovakian geographical regions (named 'east', 'middle' and 'west'). The physi co che mi cal evaluation included moisture, reduced sugars, proline, hydroxymethylfurfural (HMF), conductivity, diastase and invertase activity, pH and water activity, following the techniques proposed by the European Honey Commission (EHC). The moisture content in the honey varied from 15.26 to 17.65 %, HMF levels ranged from 21.83 to 63.00 mg. kg −1 , the diastase activity varied from 21.01 DN to 36.67, invertase activity varied from 121.73 to 164.11 U. kg −1 , the proline content varied from 426.56 to 531.79 mg. kg −1 , the fructose content values were found from 36.33 to 40.20 g. 100g −1 , the glucose content values ranged from 27.67 to 31.00 g. 100g −1 , the values of saccharose content were from 0.15 to 0.37 g. 100g −1 , the conductivity varied from 29.48 to 97.24 mS. cm −1 , the pH value varied from 4.06 to 4.80 and the water activity content varied from 0.55 to 0.57. Signifi cant diff erences (P ≤ 0.05) were found between HMF and fructose, glucose and saccharose and conductivity and pH, signifi cant differences (P ≤ 0.01) between fructose and glucose and signifi cant diff erences (P ≤ 0.001) were found between HMF and conductivity. Between blossom honey and honeydew honey were found statistical signifi cant diff erences in HMF (P ≤ 0.05) and conductivity between honeydew honey and blossom honey (P ≤ 0.001). Among regions were determined statistical diff erences between HMF and invertase (P ≤ 0.05) and conductivity (P ≤ 0.01).

PHYSICO-CHEMICAL AND TEXTURA L PROPERTIES OF HONEYS FROM NORTH EAST PART OF ROMANIA

The aim of this study is to evaluate the physico-chemical (pH, aw, free acidity, Brix concentration, moisture content, ash content, colour parameters (L*, a*, b*, chroma, hue angle and yellow index, glucose, fructose and sucrose content) and textural (hardness, viscosity, adhesion, cohesiveness, springiness, gumminess and chewiness)) properties of 5 samples of honey of different floral origins (acacia, tilia, sunflower, honeydew and polyfloral). The physico-chemical parameters of honey were in agreement with those reported by other scientists. The moisture content of all the five samples do not exceeded the maximum allowable level of 20% established by the European Commission. The acacia and tilia honeys presented green components, while all the honey presented yellow components. The highest yellow index has observed in the case of tilia honey. The data were submitted to principal component analysis (PCA) and it was found that the two principal components (PCs) explained 100% of the variations in the data set. The PC1 explains 99% of the variability and the PC2 explains 1%. The PC1 separates the honey into two groups: one group below the PC1 represented by acacia, sunflower and polyfloral honeys and the second group below the PC1 represented by tilia and honeydew honeys. Mircea OROIAN, Elena TODOSI SĂNDULEAC, Se rgiu PĂDUREȚ , Physicochemical and t extural properti es of honeys from north east part of Romania, Food and Envir on ment Safet y, Volu me XV, Issue 3 -2016, pag. 234 -239

Physico-chemical indicators and identification of selected Slovak honeys based on colour measurement

Acta Veterinaria Brno, 2012

The aim of study was to characterize 52 samples of Slovak honeys of six types (multifloral, acacia, rape, honeydew, forest and mixed). Physico-chemical analysis of honey included the water content, free acidity, pH, water activity, electrical conductivity, and hydroxymethylfurfural (HMF) content. In addition, the colour of honeys was measured using spectrophotometer and Commission Internationale de I`Eclairage method (CIE L*a*b*); four types of honey were used for identification: multifloral, acacia, rape, and honeydew. Mean values of physico-chemical indicators were as follows: water content 16-21%, acidity 6-42 mekv·kg -1 , pH 3.68-5.15, water activity 0.505-0.667, electrical conductivity 0.155-1.585 mS·cm -1 and HMF content 0.17-78.5 mg·kg -1 . The highest HMF content was found in forest honey with one sample above the limit established by Council Directive 2001/110/EC. The colour of Slovak honeys analysed in this study was very variable and ranged from pale yellow to dark brown. Differences of physico-chemical indicators and colour of honey samples were found to be significant (P < 0.05). The CIE L*a*b* methods can be used for identification of selected honey samples. This is the first similar study on Slovak honey.