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A New Electrochemical Sensor Based on Task-Specific Ionic Liquids-Modified Palm Shell Activated Carbon for the Determination of Mercury in Water Samples

机译:基于特定任务离子液体修饰的棕榈壳活性炭的新型电化学传感器用于测定水中的汞

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摘要

In this study, a potentiometric sensor composed of palm shell activated carbon modified with trioctylmethylammonium thiosalicylate (TOMATS) was used for the potentiometric determination of mercury ions in water samples. The proposed potentiometric sensor has good operating characteristics towards Hg (II), including a relatively high selectivity; a Nernstian response to Hg (II) ions in a concentration range of 1.0 × 10−9 to 1.0 × 10−2 M, with a detection limit of 1 × 10−10 M and a slope of 44.08 ± 1.0 mV/decade; and a fast response time (∼5 s). No significant changes in electrode potential were observed when the pH was varied over the range of 3–9. Additionally, the proposed electrode was characterized by good selectivity towards Hg (II) and no significant interferences from other cationic or anionic species.
机译:在这项研究中,使用由硫代水杨酸三辛基甲基铵改性的棕榈壳活性炭组成的电位传感器(TOMATS)用于电位法测定水样中的汞离子。所提出的电位传感器对Hg(II)具有良好的操作特性,包括相对较高的选择性。在1.0×10 −9 到1.0×10 −2 M的浓度范围内对Hg(II)离子的能斯特响应,检出限为1×10 < sup> −10 M,斜率为44.08±1.0 mV /十倍;响应时间短(〜5 s)。当pH在3–9范围内变化时,未观察到电极电位的显着变化。另外,所提出的电极的特征在于对汞(II)具有良好的选择性,并且不受其他阳离子或阴离子物质的明显干扰。

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