| US 7,572,999 B2 | ||
| Inductively-coupled plasma torch for simultaneous introduction of gaseous and liquid samples | ||
| Hiroaki Tao, Ibaraki (Japan); Tetsuya Nakazato, Ibaraki (Japan); and Kenichi Sakata, Tokyo (Japan) | ||
| Assigned to National Institute of Advanced Industrial Science and Technology, Tokyo (Japan); and Agilent Technologies, Inc., Palo Alto, Calif. (US) | ||
| Filed on Jul. 19, 2005, as Appl. No. 11/184,671. | ||
| Claims priority of application No. 2004-221292 (JP), filed on Jul. 29, 2004. | ||
| Prior Publication US 2006/0024199 A1, Feb. 02, 2006 | ||
| Int. Cl. B23K 10/00 (2006.01) | ||
| U.S. Cl. 219—121.52 [219/121.51; 315/111.51] | 7 Claims |
| 1. An inductively-coupled plasma torch for introducing a sample into inductively-coupled plasma through an injector tube,
said injector tube comprising:
an inner injector tube, the inside of which (a) has a capillary tube extending therethrough for introducing a gaseous sample,
and (b) provides a flow path for make-up gas; and
an outer injector tube for introducing an atomized solution sample or a dry aerosol sample, disposed outside said inner injector
tube integrally and coaxially therewith,
wherein said inner injector tube comprises a make-up gas tube for said make-up gas, disposed coaxially within said inner injector
tube, and said capillary tube is disposed coaxially within said make-up gas tube,
wherein said inner injector tube comprises a heater for keeping said make-up gas in a high temperature, provided between said
inner injector tube and said make-up gas tube,
wherein said heater comprises a thermal homogenizing pipe having a heater wire and a temperature sensor and/or thermal homogenizing
material.
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