Analysis of PCP acetate was by gas chromatography with electron capture and finally with mass spectrometric detection.
We are using FT-ICR MS (and specifically electron capture dissociation) along with molecular modeling to probe their gas phase structures.
Nature of problem: The accurate calibration of electron-capture nuclides by liquid- scintillation counting requires a knowledge of the counting efficiency.
The counting efficiency computation for electron capture nuclides is not considered.
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