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Proton induced gamma ray analysis of atmospheric aerosols for carbon nitrogen and sulfur composition/



Proton induced gamma ray analysis of atmospheric aerosols for carbon nitrogen and sulfur composition/



Analytical Chemistry 50(8): 1120-1124



A technique for the simultaneous quantitative determination of C, N and S using in-beam .gamma.-ray spectrometry was developed for use with atmospheric aerosol samples. Samples are collected on quartz filters, and the aerosol composition is determined by analyzing the .gamma. rays emitted following the inelastic scattering of 7.0-MeV protons. Samples are nondestructively irradiated for 1000 s in a He atmosphere, are not subjected to reduced pressures and can be used for subsequent analysis. Detection limits for atmospheric samples are in the .mu.g/cm2 range with a precision of 5%. The technique is compared with several more conventional methods of analysis.

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Accession: 006215546

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