A Simple, Stable, and Highly Sensitive Spectrophotometric Method for the Determination of Arsenic(III) from Different Biological Media in the Presence of Nanosilica-Cysteine Composite

Authors : Omar ALNASRA, Fawwaz KHALİLİ

Pages : 773-786

Doi:10.18596/jotcsa.1273473

View : 125 | Download : 51

Publication Date : 2023-08-30

Article Type : Research Paper

Abstract :This paper describes a selective and fairly stable colorimetric approach to determine trace amounts of arsenic conjugated with nanosilica-cysteine composite in various aqueous and biological samples in milligram per liter insert ignore into journalissuearticles values(mg/L); using Leucocrystal Violet insert ignore into journalissuearticles values(LCV); as a chromogenic reagent. Attenuated total reflectance-Fourier-transform infrared insert ignore into journalissuearticles values(ATR-FTIR); spectroscopy analysis was applied to characterize the composite. Novelty of this method is dealing with the presence of nanosilica which is reflected in the difficulty of obtaining a clear solution. The maximum absorbance is measured and Beer\`s law shows linearity over the concentration range of insert ignore into journalissuearticles values(0.75 to 5.00 mg/L); of Asinsert ignore into journalissuearticles values(III); at 590 nm. The molar absorptivity, Sandell’s sensitivity, and detection limit of the method were found to be 6.00 × 105 L/mol.cm, 8.55 × 10-2 μg/cm2, and 0.043 mg/L, respectively. The optimum reaction conditions and other analytical parameters were evaluated. Arsenic was successfully detected in a variety of aqueous and biological samples using the proposed method.
Keywords : Arsenic determination, nanosilica, spectrophotometry, Leucocrystal violet, cysteine

ORIGINAL ARTICLE URL