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Open AccessArticle

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

1
Chemistry Department, Faculty of Science, Ain Shams University, Abbasia, Cairo 11566, Egypt
2
Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
3
Applied Organic Chemistry Department, National Research Centre, Dokki, Giza 12622, Egypt
*
Authors to whom correspondence should be addressed.
Sensors 2019, 19(12), 2697; https://doi.org/10.3390/s19122697
Received: 22 May 2019 / Revised: 9 June 2019 / Accepted: 11 June 2019 / Published: 14 June 2019
(This article belongs to the Special Issue Carbon Nanotube Based Sensors)
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 (InIII-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. View Full-Text
Keywords: perchlorate; solid-contact ISEs; SWCNTs; potentiometric sensors; indium-porphyrin; fireworks and propellants perchlorate; solid-contact ISEs; SWCNTs; potentiometric sensors; indium-porphyrin; fireworks and propellants
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Hassan, S.S.M.; Galal Eldin, A.; Amr, A. .-G.; Al-Omar, M.A.; Kamel, A.H. Single-Walled Carbon Nanotubes (SWCNTs) as Solid-Contact in All-Solid-State Perchlorate ISEs: Applications to Fireworks and Propellants Analysis. Sensors 2019, 19, 2697.

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