نتایج جستجو برای: cold vapor atomic absorption spectroscopy cv aas

تعداد نتایج: 516598  

2012
Monir Noroozi Azmi Zakaria Mohd Maarof Moksin Zaidan Abd Wahab Alam Abedini

The rapid and green formation of spherical and dendritic silver nanostructures based on microwave irradiation time was investigated. Silver nanoparticles were successfully fabricated by reduction of Ag(+) in a water medium and using polyvinylpyrrolidone (PVP) as the stabilizing agent and without the use of any other reducing agent, and were compared with those synthesized by conventional heatin...

Journal: :Agriculture 2023

Peat organic soils play a major role in the accumulation of soil matter (SOM) and mercury (Hg) cycle. Large resources peatlands can be source methylmercury for many decades centuries, even if deposition is significantly reduced. The peatland drained agricultural use subject to secondary transformation, which may affect mercury. aim our work assess transformation temperate climate zone examine w...

Journal: :Clinical chemistry 1967
B Klein J H Kaufman M Oklander

The flow system developed for the determination of serum calcium by automated atomic absorption spectrophotometry (AAS) was adapted to the determination of serum magnesium. A comparison of the results of analyses by the present procedure and by an automated fluorometric procedure on identical serum specimens shows excellent agreement. from this laboratory described tile application of automated...

2005
N. P. Bigelow

We report the first observation of a non-dipole transition in an ultra-cold atomic vapor. We excite the 3P-4P electric quadrupole (E2) transition in Na confined in a Magneto-Optical Trap(MOT), and demonstrate its application to high-resolution spectroscopy by making the first measurement of the hyperfine structure of the 4P1/2 level and extracting the magnetic dipole constant A = 30.6 ± 0.1 MHz...

B. Dibaie, M. Fazli, M. J. Tafreshi,

Abstract: A thermodynamic model was used to find out the optimum temperature for the growth of ZnS single crystals in closed ampoules by chemical vapor transport technique. Based on this model 1002 °C was found to be optimum temperature for 2 mg/cm3 concentration of transporting agent (iodine). ZnS Crystals were grown in optimum (1002 °C) and non-optimum (902 °C and 1102 °C) temperatures. The c...

2001
Ewa Bulska

Atomic spectrometry and electrochemistry are usually recognized as independent analytical tools used for different purposes. Here, a brief review is given of the advantages of using electrochemistry in the various fields of atomic spectrometry techniques. In the first part, the application of electrochemical preconcentration before the atomic spectrometry will be addressed and exemplified. Elec...

Journal: :nutrition and food sciences research 0
haniyeh moallem bandani zabol university of medical sciences, zabol, iran fardeen ali malayeri zabol university of medical sciences, zabol, iran donya arefi zabol university of medical sciences, zabol, iran majid rajabian , payam-e-noor university (pnu), mashhad, iran reza entezari heravi zabol university of medical sciences, zabol, iran laleh rafighdoost zabol university of medical sciences, zabol, iran

background and objectives: heavy metals such as cadmium and lead are the most important toxins spreading through various ways like water, soil, and air in nature and easily enter human food chain. it is essential to determine the cumulative and harmful effects of these metals in nutrients, especially in cow milk because it is a unique source of food for all ages and it contains both essential a...

J. Khalil-Allafi, S. Noori,

The effect of anodic oxidation of a NiTi shape memory alloy in sulfuric acid electrolyte on its surface characteristics was studied. Surface roughness was measured by roughness tester. Surface morphology was studied using optical microscopy (OM) and scanning electron microscopy (SEM). Corrosion behavior was specified by recording Potentiodynamic polarization cur...

2013

Design and application of powder composite electrodes for electrosynthesis and electroanalysis research has been carried out. The physical characterization of electrodes was analysis using SEM, EDX and FTIR. The electrochemical stability was analysis using cyclic voltammetry. The stability of electrodes was analyzed using Atomic Absorption Spectroscopy (AAS). The powder composite electrodes wer...

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