| http://www.w3.org/ns/prov#value | - a sample in solution; at least one of a nebulizer and vaporizer for nebulizing and/or vaporizing the sample solution; an ion generator for ionizing a predetermined matter in the nebulized or vaporized sample solution to thereby form a particle stream constituted by electrically charged particles and neutral particles; a differential pumping portion including an aperture for leading said particle
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