Abstract

In general, chromium is existed in stable oxidation states, such as Cr(III) and Cr(VI) in the environment. While a certain amount of Cr(III) is required for human metabolism, Cr(VI) is known to have toxic and carcinogenic effects for all living species. Chromium compounds are widely used in different fields, such as electroplating, dyeing, photographic and textile industries. Owing to this reason, it and its compounds can easily interfere with the water resources. Because of differences in toxicity, it is important to develop a sensitive analytical method for the speciation, preconcentration and determination of chromium species in the water resources. In this work, speciation and preconcentration of Cr(III) and Cr(VI) were performed using Amberlite CG-120 resin before detection step by flame atomic absorption spectrometry. The experimental conditions for model solutions were optimized so that Cr(III) was adsorbed in a column while Cr(VI) was not. To perform this, some experimental parameters, such as pH, eluent’ type/concentration/flow rate, sample solution flow rate and adsorbent amount were optimized. Furthermore, Cr(VI) was reduced to Cr(III) to determine total chromium. Then, Cr(VI) was calculated by the differences between total chromium and Cr(III). The limit of detection (3 s) and preconcentration factor were found to be 0.3 μg L^–1 and 600, respectively. This proposed method was successfully applied for the determination of inorganic chromium species in the different spring waters supplied from Isparta province (Eyüpler Village), Burdur province (Ağlasun County), the commercial drinking water samples purchased from local market in Burdur province, and the waste water supplied from Isparta province (Suleyman Demirel Organized Industrial Region) at Turkey. The accuracy of the method was successfully checked by certified reference material (TMDA-70.2 Ontario Lake water) at 95% confidence level.

中文翻译：

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春季，饮用水和废水样品中无机铬物种的形态，预浓缩和测定

摘要

通常，环境中铬以稳定的氧化态存在，例如Cr（III）和Cr（VI）。虽然人体代谢需要一定量的Cr（III），但已知Cr（VI）对所有生物都具有毒性和致癌作用。铬化合物广泛用于不同领域，例如电镀，印染，照相和纺织工业。由于这个原因，它及其化合物很容易干扰水资源。由于毒性的差异，开发一种灵敏的分析方法以对水资源中的铬物种进行形态分析，预浓缩和测定非常重要。在这项工作中，在通过火焰原子吸收光谱法进行检测之前，使用Amberlite CG-120树脂对Cr（III）和Cr（VI）进行了形态分析和预浓缩。优化了模型溶液的实验条件，以使Cr（III）吸附在色谱柱中，而Cr（VI）则没有。为此，优化了一些实验参数，例如pH，洗脱液类型/浓度/流速，样品溶液流速和吸附剂量。此外，将Cr（VI）还原为Cr（III）以测定总铬。然后，通过总铬和Cr（III）之差计算Cr（VI）。检出限（3 s）和预浓缩因子为0.3μgL 然后，通过总铬和Cr（III）之差计算Cr（VI）。检出限（3 s）和预浓缩因子为0.3μgL 然后，通过总铬和Cr（III）之差计算Cr（VI）。检出限（3 s）和预浓缩因子为0.3μgL分别为^–1和600。该方法成功地用于测定伊斯巴达省（伊斯普勒村），布尔杜尔省（阿拉斯县）提供的不同泉水中的无机铬种类，从布尔杜尔省当地市场购买的商业饮用水样品以及废物水来自土耳其伊斯巴达省（Suleyman Demirel组织的工业区）。该方法的准确性已通过认证参考材料（TMDA-70.2安大略湖水）以95％的置信度成功检查。