Characterisation of Nectar Honeys According to their Physicochemical Parameters and Mineral Content (original) (raw)
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2016
The aim of this work was to characterise 36 samples of bee honeys from some geographical zone of Romania, which were collected two years consecutive 2012 and 2013, by physico-chemical characteristics together with content of chemical elements. For this purpose physico-chemical characteristics together with elemental content were evaluated. Physicochemical parameters: pH, electrical conductivity, ash content, refractive index and water content, were analysed using the Harmonised Methods of the International Honey Commission. Concentrations of K, Ca, Fe, Cu, Zn and Pb were determined by analytical techniques of high accuracy and sensitivity: Atomic Absorbtion Spectrometry (AAS) and Energy Dispersive X-Ray Fluorescence (EDXRF), combined with Internal Standard Technique. The obtained results indicate a good quality level, that demonstrates an adequate extracting and processing of honey.
Senzorial and Physico-Chemical Characterisation of Honey from Muntenia Zone, Romania
Current Trends in Natural Sciences, 2018
With a high nutritive value and healing properties, honey is a well known natural food product. Factors like floral source and climate condition influence the properties of honey. The study investigated sensorial and physicochemical characteristics of some honey samples collected directly from the beekeepers from Muntenia Zone, Romania. The colour, pH, moisture content, electrical conductivity, ash content, acidity and total sugar were evaluated. Moreover, these characteristics were compared with the International Standard of Codex Alimentarius. The results showed that all the honey samples had similar physico-chemical properties and respect the limits imposed by EU standards; in this way was proved that the honey from Muntenia Zone is a good quality honey. This standard could be sustained by regular training of local bee farmers in honey harvesting and storage.
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).
2007
Background: The characterization of three types of Marche (Italy) honeys (Acacia, Multifloral, Honeydew) was carried out on the basis of the their quality parameters (pH, sugar content, humidity) and mineral content (Na, K, Ca, Mg, Cu, Fe, and Mn). Pattern recognition methods such as principal components analysis (PCA) and linear discriminant analysis (LDA) were performed in order to classify honey samples whose botanical origins were different, and identify the most discriminant parameters. Lastly, using ANOVA and correlations for all parameters, significant differences between diverse types of honey were examined. Results: Most of the samples' water content showed good maturity (98%) whilst pH values were in the range 3.50-4.21 confirming the good quality of the honeys analysed. Potassium was quantitatively the most relevant mineral (mean = 643 ppm), accounting for 79% of the total mineral content. The Ca, Na and Mg contents account for 14, 3 and 3% of the total mineral content respectively, while other minerals (Cu, Mn, Fe) were present at very low levels. PCA explained 75% or more of the variance with the first two PC variables. The variables with higher discrimination power according to the multivariate statistical procedure were Mg and pH. On the other hand, all samples of acacia and honeydew, and more than 90% of samples of multifloral type have been correctly classified using the LDA. ANOVA shows significant differences between diverse floral origins for all variables except sugar, moisture and Fe. Conclusion: In general, the analytical results obtained for the Marche honeys indicate the products' high quality. The determination of physicochemical parameters and mineral content in combination with modern statistical techniques can be a useful tool for honey classification.
Physicochemical characteristics of Bulgarian bee honey: Part 1
2022
Lazarov, S., Veleva, P. & Zhelyazkova, I. (2022). Physicochemical characteristics of Bulgarian bee honey: Part 1. Bulg. J. Agric. Sci., 28 (2), 349–354 The present study investigates 59 representative samples of monofloral honey (Аcacia 12 pcs., Coriander 12 pcs., Limetree 12 pcs., Rapeseed 11 pcs., Sunflower 12 pcs.) and 30 samples of multifloral honey, crop 2019, from various apiaries on the territory of the Republic of Bulgaria. The changes in the following physicochemical parameters (Active acidity (pH); Electrical conductivity, μS/sm; Water content, %; Refractive index; Fructose + Glucose (F+G) content, %) have been studied. The obtained average values of the above parameters conform to the requirements of Council Directive 2001/110/EC relating to honey and Regulation on requirements to bee honey intended for human consumption. Statistically significant differences have been observed between the physicochemical parameters of monofloral and multifloral honey. The values of the c...
Physico-Chemical Profile of Four Types of Honey from the South of the Republic of Moldova
Food and Nutrition Sciences, 2021
There are many studies that compare the quality and biological characteristics of honey with distinct geographical and botanical origins. However, the physico-chemical and biological properties of different types of honey in the same production regions are rarely mentioned. The honey used in this study: sunflower honey, rapeseed honey, manna honey and polyflora honey, came from GT "Malai C" in Taraclia village, Causeni district in the southern part of the Republic of Moldova and belonged to the flowering season of year 2020. Following the polynecological analysis, it was found that two types of honey are monofloral with a dominant pollen content of Helianthus spp. (49.15%-93.12%) in sunflower honey and Brassica spp. (52.17%-70.11%) in rapeseed honey. Mana honey and polyflora contain several types of pollen. Thus, four types were identified in manna honey, including: Acer platanoides (29.11%-30.11%), Quercus robur (28.67%-29.99%), Rubus idaeus (21.55%-28.78%), Taraxacum officinale (22.21%-28.76%). Polyflora honey contains: Helianthus annuus (24.91%-31.11%), Brassica napus (23.45%-29.18%), Tilia (28.95%-31.92%). Based on a Pfund scale, it was found that the color of the honey varied from a lighter shade for rapeseed honey (water amber 7.66 ± 3.002 mm) to a darker color for sunflower honey and polyflora (extra light amber 34.366 ± 21.01 mm and 36.04 ± 1.115 mm respectively). Spectrophotometric determination of phenolic compounds in honey samples showed that their content ranged from 38.18 mg GAE/kg honey for rapeseed honey to 831.09 mg GAE/kg honey for manna honey. At the same time, the flavonoid content ranged from 28.41 mg QUE/kg honey for rapeseed honey to 151.72 mg QUE/kg honey for manna honey. Mana honey showed a better antioxidant activity than the other honey samples in the study (72.03%). The reported results suggest that manna honey has the best potential and its consumption in the human diet as food with valuable biological properties can be How to cite this paper: Chirsanova, A.,
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
Physicochemical properties of honey samples from Golestan province (north of Iran)
Honey, produced by the honeybee, is a natural supersaturated aqueous invert sugar solution, which is mainly composed of a complex mixture of carbohydrates. The diversity of the physical and chemical properties of honey depends on the nectar and pollen of the original plant, colour, flavour, moisture and contents of proteins and sugars. Quality of honey is determined by evaluating physicochemical properties of different honey samples collected from Golestan province (North of Iran). The 9 samples were analyzed for parameters including moisture, specific gravity, electric conductivity, dissolved solids, ash, pH, free, lactone and total acidity, sugars, fructose/glucose and glucose/water ratio, optical rotation, ash and color. The results of study indicated that all properties and honey samples were at good quality. Parameters such as pH, conductivity, fructose content and optical rotation can be used for distinguish honeydew from other samples. Correlations observed between some param...
Journal of Food Science and Technology, 2019
In this work, physicochemical properties of eight honey samples harvested from different regions over Jordan were investigated. Quality parameters including free acidity, pH, conductivity, 5-hydroxymethylfurfural (5-HMT) and diastase activity were monitored for freshly harvested samples and during storage time over 24-month. The level of minerals (Na, K, Mg, Ca, Fe, Ni, Cu, Hg, Pb and As) in samples were quantified and found to be highly variable. The combined mineral content in the collected honeys was following the trend: multi-floral-Madaba (275.17 mg/kg) \ multi-floral-Southern Shouna (600.83 mg/kg) \ Centaurea iberica-Irbid (654.42 mg/kg) \ Ziziphus Spina Christi-Al-Ghour (747.14 mg/kg) \ Urginea maritima-Petra (752.52 mg/kg) \ Echinopspolyceras-Karak (830.41 mg/kg) \ Eucalyptus-Al-Azraq (1117.1 mg/kg) \ multi-floral-Jerash (2297.57 mg/kg). As indicated from the trend, the mineral content in multi-floral-Jerash was notably high even when compared with international values. Harmful elements such as Cu, Hg, Pb and As were not detected providing higher nutritional value for the local honey. For fresh honeys, analysis revealed that samples rich with minerals have lower moisture, higher acidity, lower pH, and lower diastase activity. After 24-month storage, samples of higher minerals manifested higher values of 5-HMF and this supported that minerals would speed up glucose conversion.
From the Beehives: Identification and Comparison of Physicochemical Properties of Algerian Honey
Resources
In this study, the authors aimed at characterizing 11 Algerian kinds of honey taken from various geographical locations (beehives located at Djelfa (Medjbara and Dzaira), Laghouat, Aflou, Medea, Tiaret, Sidi bel-Abbes, Tiaret, Ain-Safra, Mostaganem, El Bayadh, and Ghardïa). The authors investigated the physicochemical parameters of these honey samples, including density, water content, electrical conductivity, ash content, pH, hydroxymethylfurfural (HMF) content, free acidity, and color. The physicochemical parameters obtained were found to be within acceptable ranges according to the international standards (Codex Alimentarius) for 9 out of 11 analyzed samples: density 1.38–1.50 g/cm3 (the same as kg/L, as commonly used for honey), water content 14.03–18.80%, electrical conductivity 0.38 × 10−1 − 6.41 × 10−1 mS/cm, ash content 0.06–0.48%, pH 3.50–4.50, free acidity 11–47 meq/kg, and color 1.1–9.2 Pfund index. Analysis of HMF content showed that only two honey samples have high valu...