最近,儿童日常消费的一些产品,如谷物和糖果,一直在上升,这为确定可能存在的任何金属物质提供了令人信服的理由。监测某些金属的浓度,像镍一样,在这些产品是必要的,由于医疗问题,在人类经常食用。所以,在这项工作中,制备了一种新型的高选择性碳糊作为Ni(II)离子选择性传感器,并使用陶瓷镁铝尖晶石纳米颗粒作为离子载体和磷酸三甲苯酯(TOCP)作为增塑剂进行了研究。采用改进的共沉淀法合成尖晶石纳米粒子。X射线衍射,扫描电子显微镜与EDAX,透射电子显微镜,和BET表面积用于确定相组成,微观结构,毛孔大小,颗粒大小,和合成的纳米颗粒的表面积。发现尖晶石纳米颗粒具有立方晶系的纳米微晶尺寸,粒径范围为17.2至51.52nm,介孔性质(平均孔径=8.72nm),和大的表面积(61.75m2/g)。基于电位法检测,在5.0×10-8至1.0×10-2molL-1的浓度下,石墨碳作为基质:TOCP作为粘合剂:脊柱作为离子载体的组成比为67.3:30.0:2.7(wt%)。-1,LOD为5.0×10-8molL-1。对于Nernstian斜率,在pH2.0-7.0下测量为29.22±0.12mVdecade-1。该传感器在9周内表现出良好的可重复性和8s的快速响应。在许多干扰物中,Ni(II)离子具有良好的选择性。三-,di-,和一价阳离子。加标实际样品中的Ni(II)含量,包括可卡因,糖果,古柯,巧克力,碳酸饮料,谷物,和包裹,被测量。根据F和t检验数据,所获得的结果表明,拟议的电位滴定法与官方报告的ICP方法之间没有显着差异。除了利用方差分析统计分析,验证程序已经实施,结果超过了ICP-MS方法。
Lately, children\'s daily consumption of some products, such as cereals and candies, has been rising, which provides a compelling rationale for determining any metallic substances that may be present. Monitoring the concentration of certain metals, like nickel, in these products is necessary due to medical issues in humans when consumed regularly. So, in this work, a novel and highly selective carbon paste as a Ni(II) ion-selective sensor was prepared and investigated using ceramic magnesium aluminum spinel nanoparticles as the ionophore and tritolyl phosphate (TOCP) as a plasticizer. A modified co-precipitation method was used to synthesize the spinel nanoparticles. X-ray diffraction, scanning electron microscope with EDAX, transmission electron microscope, and BET surface area were used to determine the phase composition, microstructure, pores size, particle size, and surface area of the synthesized nanoparticles. The spinel nanoparticle was found to have a nano crystallite size with a cubic crystal system, a particle size ranging from 17.2 to 51.52 nm, mesoporous nature (average pore size = 8.72 nm), and a large surface area (61.75 m2/g). The composition ratio of graphite carbon as a base: TOCP as binder: spinal as ionophore was 67.3:30.0:2.7 (wt%) based on potentiometric detections over concentrations from 5.0 × 10-8 to 1.0 × 10-2 mol L-1 with LOD of 5.0 × 10-8 mol L-1. A measurement of 29.22 ± 0.12 mV decade-1 over pH 2.0-7.0 was made for the Nernstian slope. This sensor demonstrated good repeatability over nine weeks and a rapid response of 8 s. A good selectivity was shown for Ni(II) ions across many interferents, tri-, di-, and monovalent cations. The Ni(II) content in spiked real samples, including cocaine, sweets, coca, chocolate, carbonated drinks, cereals, and packages, were measured. The results obtained indicated no significant difference between the proposed potentiometric method and the officially reported ICP method according to the F- and t-test data. In addition to utilizing ANOVA statistical analysis, validation procedures have been implemented, and the results exceed the ICP-MS methodology.