The ion microprobe or secondary ion mass spectrometer(SIMS) has existed for almost fifty years , but althoughgreat improvements have been made in sensitivity and easeof use, the lateral resolution has not improved quite as much.Early papers reported measurements from fifty micron areas
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A preliminary assessment of environmental volatiles in water using static headspace analysis was performed using the Agilent 7697A Headspace Sampler, Agilent 7890B GC, and the Agilent 5977B GC/MSD system with high efficiency source (HES). The revolutionary design of the HES produces a higher ion currentyield for many compounds (greater sensitivity), which allows flexible approaches to sample analysis such as lowering detection limits, reducing sample size, speeding up analysis, and so forth.[详细]
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