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• W2073502693 abstract "A proton source employing a nanostructured gold surface for use in (+)-mode laser desorption ionization mass spectrometry (LDI-MS) was evaluated. Analysis of perdeuterated polyaromatic hydrocarbon compound dissolved in regular toluene, perdeuterated toluene, and deuterated methanol all showed that protonated ions were generated irregardless of solvent system. Therefore, it was concluded that residual water on the surface of the LDI plate was the major source of protons. The fact that residual water remaining after vacuum drying was the source of protons suggests that protons may be the limiting reagent in the LDI process and that overall ionization efficiency can be improved by incorporating an additional proton source. When extra proton sources, such as thiolate compounds and/or citric acid, were added to a nanostructured gold surface, the protonated signal abundance increased. These data show that protons are one of the limiting components in (+)-mode LDI MS analyses employing nanostructured gold surfaces. Therefore, it has been suggested that additional efforts are required to identify compounds that can act as proton donors without generating peaks that interfere with mass spectral interpretation." @default.
• W2073502693 created "2016-06-24" @default.
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• W2073502693 date "2013-08-18" @default.
• W2073502693 modified "2023-09-28" @default.
• W2073502693 title "Protons are One of the Limiting Factors in Determining Sensitivity of Nano Surface-Assisted (+)-Mode LDI MS Analyses" @default.
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• W2073502693 doi "https://doi.org/10.1007/s13361-013-0713-y" @default.
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• W2073502693 hasPublicationYear "2013" @default.
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