A GREEN AND ECONOMICAL METHOD DESIGNED FOR DETECTION OF COBALT IONS UTILIZING BENZOHYDRAZIDE AS REAGENT
DOI:
https://doi.org/10.71146/kjmr693Keywords:
Spectrophotometric Method, Benzo hydrazide, Reagent, Triton X−100, Surbex-ZAbstract
A green, simple, and cost-effective spectrophotometric method for the accurate determination of trace cobal (Co (II)) ions was developed utilizing Benzo hydrazide as a chromogenic reagent in a micellar Triton X−100 medium. The method relied on rapidly forming a light pink Co (II)-BH2 complex at an optimum pH of 9.0. The complex exhibited maximum absorption (λ_max) at 436.2 nm and demonstrated excellent temporal stability, with constant absorbance for up to 140 minutes. The proposed method confirmed a 1:2 metal-to-ligand (M: L) ratio. It conformed to linear maximum concentrations range 0.1 to 5.0μgmL-1 with a high correlation coefficient (R2) of 0.999. The high sensitivity of method is evidenced by a molar absorptivity (ϵ) of 4.13×104Lmol-1cm-1 and a Sandel’s sensitivity of 5.3 ngcm-2. The technique was successfully applied and validated by comparing results against certified values and Atomic Absorption Spectrometry (AAS) in various real-world samples, including pharmaceuticals, certified alloy, water, and wastewater.
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Copyright (c) 2025 Ali Ibrahim Shar, Ghulam Abbas Shar, Gul Afshan Soomro (Author)
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