Chromium exists in its two stable oxidation states including trivalent chromium (Cr (III)) and hexavalent chromium (Cr (VI)) in natural waters. Chromium is an essential micronutrient in the trivalent form; however, the hexavalent form of chromium is considered to be a carcinogen. It is important to determine the chromium content along with speciation. There are a number of methods available for chromium determination. Speciation of chromium is essential to know the exact composition of chromium. Ion exchange chromatography is one of the techniques used to determine Cr (VI). The proposed method can be used to perform the speciation of Cr (III) and Cr (VI). It is a two-step process: first Cr (VI) is determined, followed by total chromium determination by treating the sample with potassium permanganate solution to oxidize the Cr (III) present in the sample to Cr (VI) and determining it as Cr (VI). Conductivity detector is used for the detection. Addition of potassium permanganate solution to the ground water samples for oxidizing the Cr (III) to Cr (VI) is the newly adopted sample preparation technique. The effect of potassium permanganate oxidation is studied in detail in the proposed method. This method can be used for chromium speciation in river water and ground water samples.

中文翻译：

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一种改进的离子色谱法，可通过电导检测快速灵敏地测定六价铬和总铬。

在自然水中，铬以两种稳定的氧化态存在，包括三价铬（Cr（III））和六价铬（Cr（VI））。铬是三价形式的必需微量营养素。但是，铬的六价形式被认为是致癌物。重要的是要确定铬含量以及形态。铬的测定方法很多。铬的形态对于了解铬的确切组成至关重要。离子交换色谱法是用于测定Cr（VI）的技术之一。所提出的方法可用于进行Cr（III）和Cr（VI）的形成。这是一个两步过程：首先确定Cr（VI），然后通过用高锰酸钾溶液处理样品以将样品中存在的Cr（III）氧化为Cr（VI）并将其确定为Cr（VI）来测定总铬。电导检测器用于检测。新近采用的样品制备技术是在地下水样品中添加高锰酸钾溶液以将Cr（III）氧化为Cr（VI）。该方法详细研究了高锰酸钾的氧化作用。该方法可用于河水和地下水样品中的铬形态分析。该方法详细研究了高锰酸钾的氧化作用。该方法可用于河水和地下水样品中的铬形态分析。该方法详细研究了高锰酸钾的氧化作用。该方法可用于河水和地下水样品中的铬形态分析。