EP 0430774 B1 19940928 - Device and method for detecting a chemical substance of known mass M, and known dissociation fragments in a gas to be analysed.
Title (en)
Device and method for detecting a chemical substance of known mass M, and known dissociation fragments in a gas to be analysed.
Title (de)
Vorrichtung und Verfahren zum Nachweis einer chemischen Substanz bekannter Masse M und bekannter fragmentierter Dissoziationselemente in einem zu analysierenden Gas.
Title (fr)
Appareil et procédé de détection dans une atmosphère à surveiller d'un corps chimique de masse M connue et dont on connait les fragments de dissociation.
Publication
Application
Priority
FR 8915478 A 19891124
Abstract (en)
[origin: EP0430774A1] Method for detecting a chemical substance of known mass M in an atmosphere to be monitored, with the aid of a device for ionizing this atmosphere and for dissociating, filtering and detecting the ions formed, comprising, inside an evacuated enclosure and in this order over the trajectory of the ions: - an ion source (1), - a dissociation chamber (3) brought to ground potential, - an electrostatic analyzer (4), - a detector (5) of the ions having traversed the above device, characterised in that: - the voltage V0 for extracting the ions from the ion source (1) is fixed at a constant value; - the energy level W of filtering of the electrostatic analyzer (4) is varied so as to possibly detect in the detector (5) the ionic fragments m1,...mk of dissociation of the substance with mass M which pass beyond the electrostatic analyzer with energies (m1/M)eVo = W1, (m2/M) eVo = W2... (mk/M) eVo = Wk and enable the presence of the substance with mass M to be attested. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 49/26 (2006.01); H01J 49/28 (2006.01)
CPC (source: EP US)
H01J 49/0045 (2013.01 - EP US); H01J 49/282 (2013.01 - EP US)
Designated contracting state (EPC)
BE CH DE ES GB IT LI NL
DOCDB simple family (publication)
EP 0430774 A1 19910605; EP 0430774 B1 19940928; DE 69012959 D1 19941103; DE 69012959 T2 19950504; ES 2065508 T3 19950216; FR 2655149 A1 19910531; FR 2655149 B1 19940318; US 5097124 A 19920317
DOCDB simple family (application)
EP 90403304 A 19901122; DE 69012959 T 19901122; ES 90403304 T 19901122; FR 8915478 A 19891124; US 61301290 A 19901115