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In Romania the sea buckthorn (Hippophae rhamnoides) is prevalent naturally grown in hills territories, Meridional and Eastern Carpathians valleys from Moldavia and Muntenia and also in the Danube Delta. It is a valuable medicinal plant being a rich source of all nutrients and phytochemicals. This paper presents the results of analyzes performed on sea buckthorn berries collected from two geographical areas: Bacau and Buzau. The juice of sea buckthorn fruits, the calcined pulp and the calcined integral fruits were analysed. Physico-chemical analysis of integral sea buckthorn berries showed: pH values in the range 3.1-3.3, acidity expressed as malic acid in the range 1.97-2.02% and polyphenols content in the range 94.65 mg GAE/g d.w. and 78.33 mg GAE/g d.w., respectively. Macro elements as Ca, Mg and P were also determined. The amount of calcium in sea buckthorn fruit was found in the range 57.71 - 80 mg/100g d.w., magnesium in the range 30.56-35.61 mg/100g d.w., and phosphorus 5.34-20.56 mg/100g d.w.

The determination of benzoic acid (BAc) solubility in pure imidazolium formate (ImForm) and their aqueous mixtures of [ImForm/water], was performed by the acid-base titration of the saturated solutions. [ImForm/water] solutions were tested using an ImForm concentration ranging from 1.66-4.33 g/L. The BAc solubility in pure ionic liquid was compared with that of some common organic solvents reported in literature, such as: ethanol, chloroform, cyclohexane. The highest solubility of BAc was for pure ImForm (from 1073 g/L at 293 K up to 2200 g/L at 323 K), the determined values being superior to BAc solubility in organic solvents mentioned. The results confirm that the polar solvents, such as ImForm and ethanol, present the highest BAc solubility values. At 293 K, the mole fraction of BAc in pure ImForm was 2.8 times higher than the mole fraction of BAc in ethanol. The BAc solubility in binary mixtures [ImForm/water] was compared with that determined in [NaCl/water] mixtures. At the same salt concentration, ranging from 1.66 to 4.33 g/L, at a constant working temperature (323 K), the increasing concentration of NaCl lowers the solubility of BAc. In opposite, the increasing of ImForm concentration determines a considerable increase in BAc solubility into the [ImForm/water] mixture. At 277 K, for 1.66 g/L salt concentration in water, the BAc solubility in [salt/water] solvents shows very similar values (~1.3 g/L) for both [ImForm/water] and [NaCl/water]. If the temperature increases to 323 K, the BAc solubility in [ImForm/water] mixture is about 1.5 times higher than that of solubility in distillated water and 2.5 times higher compared to that in [NaCl/water]. It was concluded that the benzoic acid presents a great solubility in pure ImForm and in its [ImForm/water] aqueous mixture.