Ion source and mass spectrometer
AssigneeHitachi, Ltd.
InventorsYasuaki Takada, Masuyoshi Yamada, Masao Suga, Yuichiro Hashimoto
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Abstract
To provide a mass spectrometer having a high sensitivity to dioxins. In the mass spectrometer including: a sample supply tube for supplying a sample solution containing a sample to be measured; a nebulizer for nebulizing the sample solution supplied from the sample supply tube; an ion source having a needle electrode for ionizing the sample nebulized and vaporized in the nebulizer; and a mass analyzer for analyzing ions formed in the ion source, and a gas of a flow rate corresponding to the flow rate of the sample solution is mixed to the vaporized sample, and a moving direction of the sample is made opposite to a moving direction of ions at a tip of the needle electrode.
Claims12
An ion source, comprising:
- a nebulizer for nebulizing a sample solution;
- a vaporizer for vaporizing a sample nebulized by said nebulizer;
- a mixer for mixing a carrier gas with the sample nebulized by said nebulizer or vaporized by said vaporizer;
- and
- a discharge chamber having a gas entrance and a gas exit through which said carrier-gas mixed sample flows in and flows out, a needle electrode that generates corona discharge, and an aperture for taking out an ionized sample.
A mass spectrometer, comprising:
- a nebulizer for nebulizing a sample solution;
- a vaporizer for vaporizing a sample nebulized by said nebulizer;
- a mixer for mixing a carrier gas with the sample nebulized by said nebulizer or vaporized by said vaporizer;
- a discharge chamber having a gas entrance and a gas exit through which said carrier-gas mixed sample flows in and flows out, a needle electrode that generates corona discharge therein, and an aperture for taking out an ionized sample;
- and
- a mass analyzer wherein ions taken out of said aperture in said discharge chamber are introduced.
Dependencies are inferred from the claim text.