UV-Vis Spectrophotometer as an Alternative Technique for the Determination of Hydroquinone in Vinyl Acetate Monomer

Abstract

As an appropriate quantity of hydroquinone (HQ) is essential to safeguard inhibition characteristics by eliminating the risk of self-polymerization of vinyl acetate monomer (VAM), the determination of the HQ content in VAM is very crucial to ensure the stability of VAM during storage and transportation as well as to achieve the possibility of a proper polymerization reaction. In this study, a simple, cheap, time-saving, and easy method has been developed by which the HQ content in VAM can be measured quickly based on the measurement of UV-Vis absorbance of the HQ content at 293 nm using methanol as a blank. No color development is required for this determination process, and the HQ content in the VAM can be measured directly without any further processing. The limit of detection, limit of quantification, linearity range, accuracy, precision, robustness, and measurement uncertainty of this method have been measured and analyzed and found to be within the acceptable limit and range. The method shows linearity within 0.36–25.0 ppm HQ content in the solution range with a regression coefficient of 0.9999, a relative spike recovery of 101.35%, precision of 1.36%, relative bias of 0.55%, and robustness with a temperature variation of −5 °C.

Synthesis of Nickel Oxide Nanoparticles and Copper-Doped Nickel Oxide Nanocomposites Using Phytolacca dodecandra L’Herit Leaf Extract and Evaluation of Its Antioxidant and Photocatalytic Activities

“… 6 Biosynthesized NiO NPs synthesized using Raphanus sativus extract and calcined at 100 °C had the best antioxidant potential with an IC 50 of 258 g/mL. 7 …”

“…6 Biosynthesized NiO NPs synthesized using Raphanus sativus extract and calcined at 100 °C had the best antioxidant potential with an IC 50 of 258 g/mL. 7 Nanoparticles have played a significant role in the bioremediation and treatment of polluted water by organic and nonorganic materials. 2 There are three fundamental practices for nanoparticle synthesis such as chemical, biological, and physical approaches.…”

“…NiO NPs synthesized by a facile green combustion method using Limonia acidissima natural fruit juice show a significant hydroxyl radical scavenging activity . Biosynthesized NiO NPs synthesized using Raphanus sativus extract and calcined at 100 °C had the best antioxidant potential with an IC 50 of 258 g/mL …”

Synthesis of ferrate (Fe(vi))-coated sand for stabilized reactivity and enhanced treatment of phenol

“…Previous studies have reported an absorbance peak at 293 nm (ref. 86) and 289 nm (ref. 87) for hydroquinone.…”

Synthesis of Cu doped NiO for Their Antioxidant and Photocatalytic Properties: Green Synthesis Using Lycopodium Linn

“…The hydroxyl radical scavenging capability of NiO NPs produced through a simple green combustion technique employing Limonia acidissima natural fruit juice is particularly impressive [14]. With an IC50 of 258 g/mL [15], the antioxidant potential of biosynthesized NiO NPs produced using Raphanus sativus peel and calcined at 100 o C was the highest. Because of their cheap cost, energy e ciency, and lack of toxicity compared to chemical techniques, biological methods of manufacturing NPs employing microorganisms including algae, fungus, bacteria, and plant leaf extracts have been proposed as potential environmentally acceptable replacements to chemical methods [16,17].…”