Preparation of Gd₂O₃ Hollow Nanospheres for Electrochemical Detection of Methyl Parathion

Abstract

The routine analysis and detection of organophosphate pesticides (OPPs) in consumer products has become an important activity, due to organophosphate insecticides' extensive applications in agriculture and pest control. We have prepared Gd 2 O 3 hollow nanospheres to fabricate the modified electrode for enzyme-free detection of methyl parathion (MP), one of the most commonly used OPPs. The electrochemical responses of MP on the Gd 2 O 3 hollow nanosphere modified glassy carbon electrode (Gd 2 O 3 /GCE) were investigated in detail. Furthermore, the current of the differential pulse voltammetry (DPV) is linear, with the MP concentration moving from 0.05 μM to 100 μM. It is demonstrated to be a sensitive and simple electrochemical method for the sensing of MP with a low detection limit (0.03 μM). The as-prepared electrode also shows a long-time stability and an acceptable selectivity. The Gd 2 O 3 /GCE is applicable for detecting MP in real samples, such as vegetables, tap water, and paddy field water, with satisfactory results. Therefore, the proposed method is promising for the routine analysis and detection of MP residues in foods and environments.

Non-Enzymatic Methyl Parathion Electrochemical Sensor Based on Hydroxyl Functionalized Ionic Liquid/Zeolitic Imidazolate Framework Composites Modified Glassy Carbon Electrode

“…OPs can irreversibly bind to acetylcholinesterase (AchE) in the human body and inhibit its decomposition, resulting in muscle paralysis, convulsions and death from suffocation. [7][8][9] Thence, the rapid and sensitive analysis of trace OPs is particularly important for the environment and human safety.…”

Fabrication of Zr(IV) Modified Gold Electrode via Layer-by-Layer Self-Assembly for Methyl Parathion

“…1 However, the widespread use of OPPs has caused serious risks to environment and human health. 2,3 Recent studies show that OPPs could inhibit acetylcholinesterase (AChE), cause acetylcholine to accumulate, thereby lead to muscarinic symptoms, nicotinic symptoms, and central nervous system symptoms after skin exposure, inhalation or ingestion. [4][5][6] Nowadays, some of OPPs even have be listed as the "extremely hazardous" pesticides to human by the World Health Organization.…”