Precise determination of iridium by neutron activation analysis coupled with internal standard method

Miura, Tsutomu; Iinuma, Yuto; Sekimoto, Shun

doi:10.1007/s10967-020-07152-2

Cited by 1 publication

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References 16 publications

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“…Thus, there is an increasing demand for the development of analytical procedures, preferably simple, sensitive, and selective ones to broaden the horizon of the applicability of iridium and its complexes. Sophisticated techniques such as NAA (Miura et al, 2020), spectrofluorimetric (Druskovic et al, 2004), AAS (Ingo et al, 2008), voltammetry (Locatelli, 2013), atomic emission and flame emission spectrometry (Jackson and Qiao, 1992), ICP-OES (Zhang and Tian, 2015), ICP-MS (Yi and Masuda, 1996), sequential flow injection analysis (Khomutova et al, 2013), imprinted polymerbased method (Sid Kalal et al, 2013), and individual catalytic method (Kawamura et al, 2011) have been employed for the purpose. However, the wider application of these techniques is restricted by several factors such as instrumentation costs, technical know-how, and maintenance issues.…”

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confidence: 99%

Radical scavenging capacity, antibacterial activity, and quantum chemical aspects of the spectrophotometrically investigated iridium (III) complex with benzopyran derivative

et al. 2022

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A comprehensive aqueous phase spectrophotometric study concerning the trace level determination of iridium (III) by its reaction with benzopyran-derived chromogenic reagent, 6-chloro-3-hydroxy-7-methyl-2-(2′-thienyl)-4-oxo-4H-1-benzopyran (CHMTB), is performed. The complexing reagent instantly forms a yellow complex with Ir (III) at pH 4.63, where metal is bound to the ligand in a ratio of 1:2 as deduced by Job’s continuous variations, mole ratio, and equilibrium shift methods. The complex absorbs maximally at 413–420 nm retaining its stability for up to 4 days. An optimum set of conditions have been set with respect to the parameters governing the formation of the complex. Under the set optimal conditions, the Ir (III)-CHMTB complex coheres to Beer’s law between 0.0 and 1.5 µg Ir (III) mL−1. The attenuation coefficient and Sandell’s sensitivity are, respectively, 1.18×105 L mol−1 cm−1 and 0.00162 μg cm−2 at 415 nm. The correlation coefficient (r) and standard deviation (SD) were 0.9999 and ± 0.001095, respectively, whereas the detection limit as analyzed was 0.007437 μg ml−1. The interference with respect to analytically important cations and complexing agents has been studied thoroughly. It is found that the majority of the ions/agents do not intervene with the formation of the complex, thus adding to the versatility of the method. The results obtained from the aforesaid studies indicate a simple, fast, convenient, sensitive, and versatile method for microgram analysis of iridium (III) using CHMTB as a binding ligand. Furthermore, the studied complex is subjected to the evaluation of antibacterial and antioxidant capacity by employing the Agar Diffusion assay and DPPH. radical scavenging method, respectively. The results obtained from the mentioned assays reveal that the investigated complex possesses significant potency as an antibacterial and antioxidant agent. Finally, the computational approach through DFT of the formed complex confirmed the associated electronic properties of the studied complex.

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