| US 7,525,086 B2 | ||
| Spray glow discharge ionization method and system | ||
| Shigeru Suzuki, Yokohama (Japan) | ||
| Assigned to Japan Science and Technology Agency, Kawaguchi-shi (Japan); and National Institute for Environmental Studies, Tsukuba-shi (Japan) | ||
| Appl. No. 10/575,107 PCT Filed Nov. 21, 2003, PCT No. PCT/JP03/14864 § 371(c)(1), (2), (4) Date Apr. 10, 2006, PCT Pub. No. WO2005/036584, PCT Pub. Date Apr. 21, 2005. |
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| Claims priority of application No. 2003-352086 (JP), filed on Oct. 10, 2003. | ||
| Prior Publication US 2007/0120066 A1, May 31, 2007 | ||
| Int. Cl. H01J 27/04 (2006.01) | ||
| U.S. Cl. 250—288 [250/423 R; 250/424; 250/425] | 19 Claims |
| 1. An in-spray glow discharge ionization method comprising the steps of:
(a) supplying a fluid containing a substance to be measured and a gas exhibiting Penning effect which is used for forming
an a nebulized flow of the fluid; and
(b) generating glow discharge in the nebulized flow of the gas exhibiting Penning effect and the fluid nebulized thereby by
applying a voltage of several tens of volts to several tens of kilovolts to generate cations of the gas exhibiting Penning
effect and excited atoms exhibiting Penning effect so as to ionize a chemical substance having low ionization probability
with high sensitivity, directly or indirectly through an intermediately generated chemical species,
wherein the chemical substance is an aromatic nitro compound, oxine copper, halogenated nitrobenzyl, or a polycyclic aromatic
hydrocarbon.
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