3D-printed electrochemical sensor applied to the determination of nitrite: A cost-effective and portable platform for environmental and clinical monitoring

IF 4.1 Q1 CHEMISTRY, ANALYTICAL
Luiz R.G. Silva , Domingos R. Santos-Neto , Jéssica S. Stefano , Daniel H. de Oliveira , Larissa S. da Silva , Heloysa S. Pittner , Cíntia L. Handa , Rodrigo A.A. Muñoz , Diego P. Rocha
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引用次数: 0

Abstract

Nitrite (NO2ˉ) is an essential compound present in various processes in nature, which ranges from environmental to biological systems. It is widely used in both food and chemical industry, and even in the production of medicines. However, the excess of NO2ˉ can cause severe damage to both the environment and human health. With this concern, this work presents a novel and easy to produce platform, entirely projected and constructed by additive manufacturing, rising a miniaturized and portable electrochemical system for the determination of NO2ˉ in water and synthetic saliva samples. The set of three electrodes was easily obtained by fused deposition modeling, using a carbon black-based filament feeding the 3D printer. The surface of the electrochemical sensors was treated to expose conductive particles and enhance their electrochemical performance. The differential-pulse voltammetry technique was meticulously chosen and fully optimized using multivariate methods to achieve the best operational conditions for the NO2ˉ determination. The proposed method presented a linear dynamic range from 5.0 to 500.0 µmol L⁻¹, with a limit of detection of 1.8 µmol L⁻¹. Besides, interference tests demonstrated a good selectivity of the method. Recovery values close to 100 % for water and simulated saliva samples demonstrate the applicability of the developed method. In this context, the 3D-printed electrochemical device becomes a potential alternative for the on-site, reliable, and fast determination of NO2ˉ.

Abstract Image

用于亚硝酸盐测定的3d打印电化学传感器:一种具有成本效益的便携式环境和临床监测平台
亚硝酸盐(NO2)是自然界从环境到生物系统各种过程中都存在的一种重要化合物。它广泛应用于食品和化学工业,甚至在药品生产中。然而,过量的二氧化氮会对环境和人体健康造成严重的危害。鉴于此,本研究提出了一种新颖且易于生产的平台,完全由增材制造预测和构建,提出了一种小型化和便携式的电化学系统,用于测定水和合成唾液样品中的二氧化氮。使用炭黑基长丝为3D打印机供料,通过熔融沉积建模可以很容易地获得三电极组。在电化学传感器表面处理导电颗粒,提高其电化学性能。采用多元方法对差分脉冲伏安法进行了优化,得到了测定二氧化氮的最佳操作条件。该方法的线性动态范围为5.0 ~ 500.0µmol L⁻¹,检测限为1.8µmol L⁻¹。干扰试验表明,该方法具有良好的选择性。水和模拟唾液样品的回收率接近100%,证明了所开发方法的适用性。在这种情况下,3d打印电化学装置成为现场、可靠和快速测定NO2 -的潜在替代方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Talanta Open
Talanta Open Chemistry-Analytical Chemistry
CiteScore
5.20
自引率
0.00%
发文量
86
审稿时长
49 days
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