Global patent index - EP 1012871 A1

EP 1012871 A1 2000-06-28 - SPRAY CHAMBER WITH DRYER

Title (en)

SPRAY CHAMBER WITH DRYER

Title (de)

SPÜHNRBELKAMMER MIT TROCKNER

Title (fr)

CHAMBRE DE PULVERISATION AVEC SECHOIR

Publication

EP 1012871 A1 (EN)

Application

EP 97951050 A

Priority

  • CA 9701007 W
  • US 77859397 A
  • US 97495797 A

Abstract (en)

[origin: WO9829896A1] A spray chamber for producing a sample for an analyzer which may contain a plasma torch. In the chamber, a heated sheath gas is fed into the periphery of the spray surrounding the spray, adjacent the origin of the spray, thus reducing the size of droplets which are recirculated, thereby reducing agglomeration of the droplets and promoting rapid drying of the spray. Preferably all of the spray solvent is evaporated in a very short chamber, thus further reducing the amount of spray recirculated, and all of the combined flow of dried particulates from the spray, nebulizing gas and sheath gas is directed into the torch. In one embodiment, the central core of the combined flow is directed to the torch and the peripheral portion of the combined flow is ducted to waste. In another embodiment the aqueous spray solvent is fully evaporated before it leaves the spray chamber, and the combined flow is directed through a membrane dryer before reaching the torch, to remove most of the water vapor from the flow and thus to reduce water vapor loading on the torch.

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

H01J 49/04; G01N 21/73; G01N 30/72

IPC 8 full level (invention and additional information)

G01N 27/62 (2006.01); G01N 21/73 (2006.01); H01J 49/04 (2006.01); H01J 49/10 (2006.01)

CPC (invention and additional information)

H01J 49/049 (2013.01); H01J 49/045 (2013.01); H01J 49/105 (2013.01)

Citation (search report)

See references of WO 9829896A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9829896 A1 19980709; AU 5474598 A 19980731; CA 2276018 A1 19980709; CA 2276018 C 20041123; EP 1012871 A1 20000628; JP 2001507449 A 20010605; JP 3831415 B2 20061011

INPADOC legal status

2010-08-11 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20100216

2004-04-07 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20040223

2000-06-28 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19990723

2000-06-28 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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