![]() ![]() Although these methods are accurate and sensitive, they are expensive, time consuming, and necessitate complicated sample pretreatment procedures. ![]() 2008).ĭetection of chromium in water samples has been measured by a variety of techniques including inductively coupled plasma–mass spectroscopy, electrothermal atomic absorption spectrometry, atomic emission spectroscopy, fluorescence imaging, potentiometric membrane sensor, voltammetry, etc. Therefore, the determination of chromium ion concentration is important in water samples, and also in environmental and industrial applications ( Memon et al. The threshold limit for chromium uptake is 0.1 mg One of the pathways by which chromium enters the human body is through the intake of water. Thus, large quantities of chromium compounds can be released into the environment and drinking water ( Kumar & Shim 2008). Chromium is commonly used in numerous industrial processes including pigment production, electroplating and tanning. But its accumulation in the human body results in toxicity. Among these metal ions, chromium (III), at trace levels, is a micronutrient that plays an important role in the activation of insulin to maintain the correct levels of glucose in the blood. The necessity of selective determination of transition and heavy metal ions has increased immensely during the last few decades due to increasing environmental issues. The proposed method is seen as a simple and effective way of determining Cr 3+ concentration. The proposed method was successfully applied to the determination of Cr 3+ content in water and alloy samples. The thermodynamic parameters showed that complex formation is a spontaneous exothermic process. Infrared (IR) spectrum and density functional theory (DFT) calculations were used to explore the coordinating sites and the complex strength of two ligands towards Cr 3+. Under the optimum conditions the absorbance of the Cr 3+-L complex obeys Beer's law in the Cr 3+ concentration range of 0.05–2.60 μg/mL with the limit of detection of 0.026 and 0.034 μg/mL for L1 and L2, respectively. The important analytical parameters, such as pH, quantity of the reagents, and their effects on the studied system were investigated. The results showed that the receptors had a higher selection of Cr 3+. In this paper, cation recognition properties of two benzyl-functionalized benzimidazolylidene ligands towards metal ions were investigated by UV–vis spectrophotometry. The development of a sensitive and selective chromium detection method is an important issue. Chromium is one of the most notorious environmental pollutants. ![]()
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