A new extraction catalytic kinetic spectrophotometric method for the determination of trace molybdenum is studied. The method is based on the molybdenum (VI) catalytic oxidation of o-aminophenol by hydrogen peroxide in week acidic medium at pH 5.5. The reaction is carried out at room temperature. The reaction time, concentration of o-aminophenol in aqueous phase and degree of reaction are controlled by extraction equilibrium. The absorbance of organic phase is measured at 424 nm. Under the optimum experiment conditions, the linear range of the determination is 0.0050-2.0 mg.L-1, the detection limit is 2.0 x 10(-6) g.L-1. Combining with separation of ionic exchange, the method has been applied to the determination of trace molybdenum in bean samples with satisfactory results. The kinetic equation of extraction catalytic reaction is discussed.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Integrative biomonitoring in Litopenaeus vannamei: Metal analysis and biochemical markers.
Mar Pollut Bull
January 2025
ICAR-National Institute of Abiotic Stress Management, Baramati, Pune-413115, India.
Contaminants are a major cause of seafood export rejections in foreign markets and have significantly impacted consumer health. This investigation addresses the issues of metal contamination and biochemical markers in Litopenaeus vannamei from East Midnapore, West Bengal, India. The analyzed metals included vanadium (V), chromium (Cr), manganese (Mn), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), molybdenum (Mo), silver (Ag), gallium (Ga), germanium (Ge), arsenic (As), selenium (Se), strontium (Sr), tin (Sn), cadmium (Cd), mercury (Hg), and lead (Pb), using Inductively Coupled Plasma Mass Spectrometry (ICP-MS).
View Article and Find Full Text PDFDesign and Optimization of W-Mo-V High-Speed Steel Roll Material and Its Heat-Treatment-Process Parameters Based on Numerical Simulation.
Materials (Basel)
December 2024
School of Material Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, China.
W-Mo-V high-speed steel (HSS) is a high-alloy high-carbon steel with a high content of carbon, tungsten, chromium, molybdenum, and vanadium components. This type of high-speed steel has excellent red hardness, wear resistance, and corrosion resistance. In this study, the alloying element ratios were adjusted based on commercial HSS powders.
View Article and Find Full Text PDFAssociations of Essential and Non-Essential Trace Elements' Levels in the Blood, Serum, and Urine in Women with Premature Ovarian Insufficiency.
Biol Trace Elem Res
January 2025
Clinical Research Centre, University Medical Centre Ljubljana, Zaloška Cesta 2, 1000, Ljubljana, Slovenia.
Premature ovarian insufficiency (POI) is poorly understood, with causes identified in only 25% of cases. Emerging evidence suggests links between trace elements (TEs) and POI. This study is the first to compare concentrations of manganese (Mn), copper (Cu), zinc (Zn), selenium (Se), molybdenum (Mo), arsenic (As), cadmium (Cd), mercury (Hg), and lead (Pb) across urine, serum, and whole blood in women with POI compared to healthy controls (HC), aiming to explore their distribution and potential associations with POI.
View Article and Find Full Text PDFMolecular Dynamics of Peptide Sequencing through MoS Solid-State Nanopores for Binary Encoding Applications.
J Phys Chem B
January 2025
Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université de Bourgogne, 21078 Dijon Cedex, France.
Biological peptides have emerged as promising candidates for data storage applications due to their versatility and programmability. Recent advances in peptide synthesis and sequencing technologies have enabled the development of peptide-based data storage systems for realizing novel information storage technologies with enhanced capacity, durability, and data access speeds. In this study, we performed coarse-grained peptide sequencing of 12 distinct sequences through single-layer MoS solid-state nanopores (SSNs) using molecular dynamics (MD).
View Article and Find Full Text PDFInductively coupled plasma mass spectrometry was employed to determine the content of 25 inorganic elements in Bambusae Concretio Silicea, and the elemental fingerprint was established according to the element content. SPSS 20.0 and SIMCA 14.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!