Trace Level Arsenic Quantification through Cloud Point Extraction: Application to Biological and Environmental Samples

A sensitive solvent-free extraction protocol for the quantification of arsenic at trace level has been described. It is based on the reaction of arsenic (V) with molybdate in acidic medium in presence of antimony (III) and ascorbic acid as a reducing agent to form a blue-colored arsenomolybdenum blue complex. The complex has been extracted into surfactant phase using Triton X-114, and its absorbance was measured at 690 nm. The detection limit, working range, and the relative standard deviation were found to be 1 ng mL−1, 10–200 ng mL−1, and 1.2%, respectively. The effect of common ions was studied, and the method has been applied to determine trace levels of As(III) and As(V) from a variety of samples like environmental, biological, and commercially procured chemicals

Micellar mediated trace level mercury quantification through the rhodamine B hydrazide spirolactam ring opening process

The micellar mediated trace level estn. of mercury in industrial effluent sample by the rhodamine B hydrazide spirolactam ring opening process is described. The catalytic reaction of mercuric ion with colorless rhodamine B hydrazide to form pink colored rhodamine B through amide bond cleavage at pH 5 forms the basis of this reaction. The dye obtained was extd. from the aq. phase into non-​ionic surfactant using Triton X-​114 through cloud point formation and its absorbance was measured at 556 nm. The reaction conditions such as concns. of rhodamine B hydrazide and Triton X-​114, effect of NaCl concn. on cloud point temp. and the efficiency of extn. were optimized. The selectivity of the method towards mercury in the presence of various ions was studied. The validity of the method was examd. by spiking real samples with known amts. of mercury and carrying out recovery studies. The results obtained by the proposed method were compared with the std. dithiazone method. The preconcn. and enrichment factors were found to be 5 and 12 resp. The limit of detection and the linear range were found to be 1.4 ng ml-​1 and 10-​100 ng ml-​1 resp. The relative std. deviation was found to be 0.35​% at 20 ng ml-​1

Eco-friendly synthesis of novel magnesium oxide nanomaterials for dye degradation, battery, and sensor applications

Nowadays green synthesis is being incorporated into various technological fields to achieve more sustainable and environmentally friendly processes. By reducing the use of hazardous chemicals, minimizing waste generation, and utilizing renewable resources, green synthesis offers potential solutions to address environmental concerns and promote sustainable development in technology sectors. Herein we demonstrate an environmentally friendly green approach for the fabrication of MgO nanoparticles by using various fruit extracts. In this current study, watermelon, Aloe vera, and Jamun fruit extracts are used as fuel for the synthesis of MgO nanomaterials. Prepared materials were characterized by various characterization techniques. Scanning electron microscopy (SEM) images demonstrate the porous nature of the material and the Diffused reflectance spectroscopy (DRS) reveals the energy gap (4.8–4.9 eV) of the material. Photocatalytic degradation of Direct Green (DG) dye was evaluated under UV light irradiation and the catalyst prepared via jamun fuel (MgO-J) exhibited excellent catalytic activity at 84% for the degradation of DG dye under UV light and better electrochemical behavior as an electrode material compared to other prepared materials. This present work demonstrates a highly efficient eco-friendly route to synthesize MgO nanoparticles for multifunctional applications and also encourages sustainable development in technology areas