Published in Scientific Bulletin. Series F. Biotechnologies, Vol. XIX
Written by Ionuț Răzvan DOBRE, Ioana Cristina DOBRE
Water represents the essential natural resource needed for all biological processes in nature, having a particular importance for sustaining life. Nowadays drinking water has as main source, sourface waters and groundwaters that are the source of natural mineral waters. Mineral waters have a very important weight in our alimentation being intended both for daily consumption as for treating certain diseases. In order to satisfy consumers preferences, the producers resort to diversify the assortments of natural mineral water from the market, either by partially or totally degassing or by impregnating with extra carbon dioxide. The study was performed on three assortments of partially decarbonated mineral water, aiming the level of nitrates, nitrites, chromium, copper, nickel by spectrophotometer method, using a UV-VIS SPECORD 205 spectrophotometer, respectively absorbtion spectrophotometer with graphite furnace. After the determinations carried out, reading and interpretation of the results, it was noted that the case of assortment 3 at the studied batch, the level of nitrates (2,01 mg/l) was larger than that shown on the label, and nickel level was considerable higher (0,014 mg/l) compared with the level of other minerals determined. All studied parameters were situated under maximum allowable limits, even if in case of assortment 3 at analyzed batch was noted a higher level of nitrates compared with the one shown on the label. In case of assortments 1 and 2 at analyzed batch the levels of nitrates, chromium, copper, nickel were situated under the values shown on the label. Even if the researched parameters are under the maximum allowable limits by the legislation in force, is needed a carefully monitoring by the competent institutions.
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heavy metals
