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Origins of PM10 determined by the micro-proton induced X-ray emission spectra of single aerosol particles.
Appl Spectrosc
June 2006
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 201800 Shanghai, China.
The micro-proton induced X-ray emission (micro-PIXE) spectrum of a single aerosol particle (SAP) was considered as its fingerprint for tracing its origin. A proton microprobe was used to extract fingerprints of SAPs. Environmental monitoring samples of PM(10) were collected from a heavy industrial area of Shanghai and were analyzed by proton microprobe for finding their pollution sources.
View Article and Find Full Text PDFElemental analysis of proteins by microPIXE.
Prog Biophys Mol Biol
October 2005
Laboratory of Molecular Biophysics, Department of Biochemistry, University of Oxford, Oxford OX1 3QU, UK.
The identification and quantification of metals bound to proteins is a crucial problem to be solved in structural biology. This paper describes the technique of particle induced X-ray emission with a microfocused beam (microPIXE) as a tool for analysing the elemental composition of liquid and crystalline protein samples. The proton beam induces characteristic X-ray emission from all elements in the protein, which can be interpreted in terms of the metal content of the protein molecule with a relative accuracy of between 10% and 20%.
View Article and Find Full Text PDF[Microbeam nuclear reaction analysis and its application to individual fluid inclusions].
Guang Pu Xue Yu Guang Pu Fen Xi
June 1999
Department of Physics II, Fudan University, 200433 Shanghai.
The principles and analytical technique of nuclear analysis of scanning microprobe (micro-NRA) was introduced. It is a useful tool for nondestructive light elements analysis which can not be detected by micro-PIXE. Using 19F (p, alphagamma)16O reaction at 872 keV resonance energy, the fluorine concentration in trapped fluid inclusions of mantle derived olived-evidence from Cenozoic basaltic rocks in Eastern-China was determined.
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