Ion-selective electrode based on polyurethane-immobilized di-(2-ethyl hexyl) phosphoric acid for low-concentration aqueous Pb2+ detection and quantification

IF 10.61 Q3 Biochemistry, Genetics and Molecular Biology Biosensors and Bioelectronics: X Pub Date : 2024-09-28 DOI:10.1016/j.biosx.2024.100547

Khairun Nisah , Eka Safitri , Rahmi Rahmi , Muliadi Ramli , Reni Silvia Nasution , Muhammad Iqhrammullah

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Abstract

This study used a polyurethane (PU)-based ion selective electrode (ISE) immobilized with di-(2-ethyl hexyl) phosphoric acid (D2EHPA) to detect and quantify Pb²⁺ ions at low concentrations (10⁻¹⁰ to 10⁻¹ M) in aqueous solution. PU, synthesized from castor oil (Ricinus communis L.), was utilized as the ISE membrane matrix. The ISE demonstrated a sensitivity of 26.24 ± 0.12 mV/decade, a detection limit of 1.44 × 10⁻⁷ M, and a response time of 10 s. We maintained the measurement stability for up to six days of storage.

The results of Pb²⁺ quantification produced by ISE were compared with the results using atomic absorption spectroscopy (AAS), indicating similar Pb²⁺ concentrations in both artificial and real wastewater samples (calculated t-value < theoretical t-value). Therefore, this ISE is suitable for detecting trace levels of Pb²⁺ and quantifying them with high accuracy.

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基于聚氨酯固定化二（2-乙基己基）磷酸的离子选择性电极，用于低浓度水体 Pb2+ 的检测和定量

本研究使用固定了二-（2-乙基己基）磷酸（D2EHPA）的聚氨酯（PU）基离子选择电极（ISE）来检测和定量水溶液中低浓度（10-10 至 10-1 M）的 Pb2+ 离子。用蓖麻油（Ricinus communis L.）合成的聚氨酯作为 ISE 膜基质。ISE 的灵敏度为 26.24 ± 0.12 mV/decade，检测限为 1.44 × 10-7 M，响应时间为 10 s。我们将 ISE 的 Pb2+ 定量结果与原子吸收光谱法（AAS）的结果进行了比较，结果表明人工废水和实际废水样品中的 Pb2+ 浓度相似（计算 t 值 < 理论 t 值）。因此，这种 ISE 适用于检测痕量 Pb2+，并能准确定量。

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来源期刊

Biosensors and Bioelectronics: X Biochemistry, Genetics and Molecular Biology-Biophysics

CiteScore

4.60

自引率

0.00%

发文量

166

审稿时长

54 days

期刊介绍： Biosensors and Bioelectronics: X, an open-access companion journal of Biosensors and Bioelectronics, boasts a 2020 Impact Factor of 10.61 (Journal Citation Reports, Clarivate Analytics 2021). Offering authors the opportunity to share their innovative work freely and globally, Biosensors and Bioelectronics: X aims to be a timely and permanent source of information. The journal publishes original research papers, review articles, communications, editorial highlights, perspectives, opinions, and commentaries at the intersection of technological advancements and high-impact applications. Manuscripts submitted to Biosensors and Bioelectronics: X are assessed based on originality and innovation in technology development or applications, aligning with the journal's goal to cater to a broad audience interested in this dynamic field.