Global Patent Index - EP 1320868 A1

EP 1320868 A1 2003-06-25 - METHOD FOR DETERMINING THE MOLECULAR MASS OF CONSTITUENTS OF A CHEMICAL ELEMENT

Title (en)

METHOD FOR DETERMINING THE MOLECULAR MASS OF CONSTITUENTS OF A CHEMICAL ELEMENT

Title (de)

VERFAHREN ZUR MOLEKULAR MASSEN-BESTIMMUNG DER BESTANDTEILEN EINES CHEMISCHEN STOFFES

Title (fr)

METHODE DE DETERMINATION DE LA MASSE MOLECULAIRE DES CONSTITUANTS D'UN CORPS CHIMIQUE

Publication

EP 1320868 A1 (FR)

Application

EP 01976343 A

Priority

  • FR 0103009 W
  • FR 0012465 A

Abstract (en)

[origin: WO0227757A1] The invention concerns a method for determining the molecular mass M of at least a chemical element at the output of a mass spectrometer comprising a dissociation box (16) wherein the ions of the elements supplied by an ion source are dissociated into several fragments after having struck the molecules of an inert gas (18), an electrostatic analyzer (20) wherein the fragments are subjected to an electrostatic field between two electrodes (22, 24) so as to select the fragments having a predetermined specific mass (m>i<) according to the electrostatic field and a detector (26) for detecting the fragments at the output of the electrostatic analyzer. The method consists in calculating the ration between the masses of two unknown fragments for all the possible couples of fragment masses, comparing each of the ratios obtained with the mass ratios of standard fragments corresponding to the compounds currently obtained by dissociation of a particular element, and in determining the mass M of the element using the ratios of unknown fragments which are equal to the ratios of the standard fragments.

IPC 1-7 (main, further and additional classification)

H01J 49/28

IPC 8 full level (invention and additional information)

H01J 49/04 (2006.01)

CPC (invention and additional information)

H01J 49/282 (2013.01); G06F 19/703 (2013.01); H01J 49/0045 (2013.01)

Citation (search report)

See references of WO 0227757A1

Designated contracting state (EPC)

AT BE CH DE GB LI

EPO simple patent family

WO 0227757 A1 20020404; AU 9564501 A 20020408; EP 1320868 A1 20030625; FR 2814811 A1 20020405; FR 2814811 B1 20021206; US 2003052267 A1 20030320

INPADOC legal status


2005-10-26 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20050401

2004-05-12 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

- Designated State(s): AT BE CH DE GB LI

2003-06-25 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020625

2003-06-25 [AK] DESIGNATED CONTRACTING STATES:

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2003-06-25 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL LT LV MK RO SI