Tungsten needles can be used for microscale mass spectrometry. In mass spectrometry, a sample is ionized and then separated by its mass-to-charge ratio. Tungsten needles can be used as probes to extract small amounts of the sample and ionize it for analysis. The small size of tungsten needles allows for precise sampling and manipulation of the sample. Additionally, the high melting point and chemical stability of tungsten make it a suitable material for use in harsh chemical environments often encountered in mass spectrometry.
