Single-Walled Carbon Nanotubes (SWCNTs) as Solid-Contact in All-Solid-State Perchlorate ISEs: Applications to Fireworks and Propellants Analysis

Sensors

MohamedA. Al-Omar¹  Ahmed Galal Eldin²  SaadS. M. Hassan²  AymanH. Kamel³  AbdEl-Galil E. Amr³ 

[1] Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;Chemistry Department, Faculty of Science, Ain Shams University, Abbasia, Cairo 11566, Egypt;;Pharmaceutical Chemistry Department, Drug Exploration &

关键词: perchlorate;    solid-contact ISEs;    SWCNTs;    potentiometric sensors;    indium-porphyrin;    fireworks and propellants;   

DOI  :  10.3390/s19122697

来源: DOAJ

【 摘 要 】

Herein, we present reliable, robust, stable, and cost-effective solid-contact ion-selective electrodes (ISEs) for perchlorate determination. Single-walled carbon nanotubes (SWCNTs) were used as solid-contact material and indium (III) 5, 10, 15, 20-(tetraphenyl) porphyrin chloride (In^III-porph) as an ion carrier. The sensor exhibited an improved sensitivity towards ClO₄⁻ ions with anionic slope of −56.0 ± 1.1 (R² = 0.9998) mV/decade over a linear range 1.07 × 10⁻⁶ − 1.0 × 10⁻² M and detection limit of 1.8 × 10⁻⁷ M. The short-term potential stability and the double-layer capacitance were measured by chronopotentiometric and electrochemical impedance spectroscopy (EIS) measurements, respectively. The sensor is used for ClO₄⁻ determination in fireworks and propellant powders. The results fairly agree with data obtained by ion chromatography.

【 授权许可】

Unknown