in this research na-y was synthesized by hydrothermal method and used as support for preparation of sn/pt/na-y catalysts using two different tin precursors, bu3sn(cl) and sncl2.2h2o, by sequential impregnation, in which the pt  was deposited first and in the next step sn was deposited. the catalysts were characterized by h2 chemisorption, transmission electron microscopy (tem), scanning electro...

The purpose of this unit is to introduce the fundamental principles of x-ray fluorescence spectroscopy (XRF), apply this method to the analysis of simulated data for heavy metals in suspended particulate and sediment samples from Lake Nakuru and critically contrast XRF with alternative methods for determination of heavy metal concentrations. The content is appropriate for students in a course i...

according to circumstance of kerman sarcheshmeh cooper complex that its anode slime is mainly consisted of cu, ag, au, pb and se. in this work, recovery of silver from anode slime and subsequent synthesis of silver nanoparticles from leaching solution was made. silver was separated from anode slime by using of hno3 and hcl. x-ray fluorescence spectroscopy (xrf) was used to characterize anode sl...

A test bench instrument constructed at MOXTEK, Inc. is capable of simultaneously capturing X-ray diffraction (XRD) and X-ray fluorescence (XRF) information using a charge-coupled device (CCD) as the X-ray detector. NASA is funding the instrument’s construction because of its low-power consumption and compact size; it could be used for in-situ planetary exploration missions for mineral analysis....

High energy synchrotron radiation X-ray fluorescence (SR-XRF) spectra for the forensic analysis of Wakayama arsenic poisoning case, Japan, were revisited. The spectra were measured at SPring-8 synchrotron facility by Nakai in December 1998 and Mo, Sn, Sb, and Bi were used as index elements at that time to demonstrate that the suspected saleswoman’s pesticide and that found near the curry pot we...

In this study simple catalytic test experiment was performed in a flask of rotary evaporator for dechlorination of nitrochlorobenzene (NCB) over two samples of Ni/LaAl2 O3 nanocatalysts (C1 and C2). In the reaction, Ni acts as a catalyst to collect hydrogen gas in aqueous solution and dissociate it to produce active hydrogen atoms for replacing the chlorine. The catalysts were characterized by ...

The identification of organic colorants in works of art has traditionally been one of the most difficult challenges in cultural heritage science. While non-invasive methods such as X-Ray fluorescence spectrometry (XRF), or Raman microscopy are extremely useful for the identification of inorganic pigments, they remain generally unsuitable for the analysis of most organic colorants. The absence o...

In this study, two new Ni/La-Al2O3 catalysts were prepared by a sol-gel method, with different aluminium precursors (aluminium triisopropoxide and aluminium nitrate). The catalysts were characterized by scanning electron microscope (SEM), X-ray fluorescence (XRF), X-ray diffraction (XRD), BET specific surface area, and particle size analysis (PSA) techniques. The BET results showed that the par...

One of the advantages of X-ray fluorescence XRF analysis is its ability to perform accurate quantitative analysis over a wide range of elements with relative ease. In addition, its high sensitivity makes it ideal for trace elemental analysis. The establishment of analytical conditions for XRF is straightforward, including the determination of spectral line overlap correction factors. As with mo...