Niećko J, Sobótka M, Kukułka-Niećko U, Niećko M
Wydział Chemii UMCS, Plac Marii Curie-Skłodowskiej 3, 20-031 Lublin.
Przegl Lek. 2001;58 Suppl 7:25-9.
In the last decades it has been found out that elevated levels of nitrates in drinking water and eatable plants have the negative impact on human health. During transportation, keeping and preparing the vegetables for consumption, as well as in the human body itself, nitrates undergo the reduction into nitrites (nitrate(III)). This reduction process runs relatively fast in the alimentary canal of infants under the age of 6 months. Nitrites, in the presence of some substances that occur in foodstuff, can favour the cancerogenic processes. In addition to that, nitrites can lead among infants to the disease called methemoglobinemia (blue baby syndrome). In 1986 WHO fixed the limit of the contents of nitrates in drinking water to 10 mg N-NO3-/dm3 (45 mg NO3-/dm3). The aim of this study was to evaluate the level of nitrates in the water of selected drinking water wells situated in the parish of Szydłowiec, a province of Swietokrzyskie. The study was conducted in three series, i.e.: in the summer of 1995, in the winter of 1996 and in the summer of 2001. The concentration of NO3- in water was determined (in situ) with the Merckoquant Nitrate test kits of the Merck Company. The obtained results show that the NO3- concentration in the water of the majority of studied wells exceeds clearly the acceptable NO3- drinking water standard established for drinking water by WHO.
在过去几十年中，人们发现饮用水和可食用植物中硝酸盐含量升高对人体健康有负面影响。在蔬菜运输、储存、准备食用的过程中，以及在人体自身内部，硝酸盐都会被还原为亚硝酸盐（硝酸根(III)）。在6个月以下婴儿的消化道中，这种还原过程进行得相对较快。亚硝酸盐在食物中某些物质存在的情况下，会促进致癌过程。此外，亚硝酸盐会导致婴儿患上高铁血红蛋白血症（蓝婴综合征）。1986年，世界卫生组织将饮用水中硝酸盐含量的限值定为10毫克N-NO₃⁻/立方分米（45毫克NO₃⁻/立方分米）。本研究的目的是评估位于什切青省希德沃维采教区的选定饮用水井水中的硝酸盐含量。该研究分三个阶段进行，即：1995年夏季、1996年冬季和2001年夏季。使用默克公司的默克速测硝酸盐测试盒现场测定水中NO₃⁻的浓度。所得结果表明，大多数研究水井水中的NO₃⁻浓度明显超过了世界卫生组织规定的饮用水中可接受的NO₃⁻标准。
