Chemical analysis of sample

A limiting factor in electron microscopy is the quality of the electron beam. Aberrations introduced by the optics limit both spatial resolution and analytical capabilities. There is a need to correct for the spherical and chromatic aberrations introduced by the electron optics. This will result in improved coherence of the beam and improved imaging and diffraction. In particular, these advances will permit the analysis of amorphous samples. Smaller beam sizes can also be achieved, allowing for sub-Angstrom resolution chemical analysis of samples. Development of higher-quality electron beams and short pulses of electron beams would broaden and deepen the application of electron microscopy. 

The Chemical Weapons Convention (CWC), which entered into force in April 1997, contains provisions for chemical analysis of samples in both on-site and off-site laboratories. On-site laboratories will be manned by the inspectors of the Organization for the Prohibition of the Chemical Weapons (OPCW) and equipped with the analytical equipment... 

McDonald et al. (1986b) reported that TEM and chemical analysis of samples of airborne fibers from various locations of the Libby, Montana, vermiculite mine and mill showed several morphologies (straight with uniform diameter, needle shape, and curved), chemical content compatible with the... 

HM-MOR was dealuminated with phosgene between 673 and 973 K. Chemical analysis of samples combined with A1 NMR and Si NMR data allowed us to quantify the Si/Al ratio, the concentration of extra-framework aluminium and framework vacancies. The Si NMR spectra reveal progressive dealumination with increasing temperature, accompanied by formation of SiCl and Si(OH)2 defect groups. The former yields quantitatively SiOH groups. The result showed unambiguously that framework reconstruction occurred during dealumination. 

Reddy, M. M. Werner, M. Chemical analysis of samples from a rainfall-runoff experiment using limestone and marble at Research Triangle Park, North Carolina," U.S. Geological Survey Open-File Report 85-630. 

Chemical analysis of samples Al, A2, B1 B2 are given in Tablel. It could be noticed that the Pt loading remains the same and the chloride content varies from 0.008 to 0.24%. B2 sample, which was prepared by sodium borohydride reduction and further washing, showed the lowest chloride content among all the samples. 

As previously mentioned, chemical analysis of samples of the Lagoon sludge showed relatively high levels of several solvents and other organic chemicals. Based on these results and the low levels of dioxin previously determined, it seemed desirable to remove these chemical sludges to eliminate a future potential point source of contamination to the groundwater. 

Chemical Analysis of Sample 228 Felsic Pyroclastic, Leverett Formation,... 

Chemical analysis of samples of coirmum salt yields metallic sodium and dichlorine (a noxious green gas)—but those stable materials are not in any scaise cranpontaits of salt... 

Applications of XRF and PIXE Techniques 85 1.12.6 For Chemical Analysis of Samples... 

Chemical analysis of samples taken from the product... 

Chartrand, S. Gibbs and D. Kurylo, with chemical analysis of samples, is gratefully acknowledged. 

---