A highly sensitive electrochemical probe for trace determination and chemical speciation of lead in water and foodstuffs using Thorin-I as a selective chelating agent

El-Shahawi, M.S.; Al-Sibaai, A.A.; Bashammakh, Abdulaziz S.; Al-Ariqei, Hakeem Kaid

doi:10.1007/s11696-020-01500-y

Cited by 4 publications

(1 citation statement)

References 49 publications

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“…In addition, Hg 2+ can be converted into methyl mercury by microorganisms which causes great harm to human health [43,44]. On the contrary, HMDE is extensively used in stripping voltammetry for trace determination of various metal ions and pesticides [31-33, 45, 46] and metal ions [47][48][49] because it has good reproducibility and selectivity towards sulfur compounds [45,46]. Moreover, if the disposal and storage of Hg are employed in a controlled and protected manner, the HMDE becomes safe for use.…”

Section: Introductionmentioning

confidence: 99%

A Highly Sensitive Electrochemical Sensor Based on Electrocatalytic Reduction Effect of Cu2+ on Trace Determination of Malathion in Soil and Other Complex Matrices

Alshareef

Orif

Al-Harbi

et al. 2021

International Journal of Electrochemistry

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The current strategy reports a highly sensitive and selective square wave-cathodic stripping voltammetric protocol for malathion determination. The established method was based on the controlled adsorptive accumulation of malathion in the presence of Cu2+ ions in an aqueous solution of pH 2 onto the hanging mercury dropping electrode (HMDE) and measuring the resulting cathodic peak current of the adsorbed species at −0.42 V versus Ag/AgCl electrode. The low limits of detection (LOD) and quantification (LOQ) of malathion of the assay were estimated to be 3.1 × 10−10 and 1.03 × 10−9 M with a linear dynamic range of 1.03×10−9 – 2.0 × 10−7 M, respectively. The method was satisfactorily applied and validated for malathion determination in environmental samples. The experimental Student texp and Fexp values did not exceed the tabulated ttab (2.78) and Ftab (6.39) at 95% (P = 0.05) confidence (n = 5), confirming the precision and independence on the matrix. The developed sensing platform for the detection of malathion shows superior performance to conventional electrochemical methods. The proposed sensor offered simple, economical, reproducible, and applicable approach for the determination of malathion in environmental samples.

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