公开(公告)号：FR2685495A1

公开(公告)日：1993-06-25

申请号：FR9213424

申请日：1992-11-06

Applicant: WALLAC OY ,  WALLAC OY

Inventor： STUART WEBB ,  WEBB STUART ,  TAPIO YRJONEN ,  YRJONEN TAPIO ,  TUULA STARK ,  STARK TUULA ,  TIMO OIKARI ,  OIKARI TIMO

IPC: G01T1/204

Abstract: Dans ce procédé, l'échantillon (14) est un mélange du spécimen à analyser et d'un agent scintillateur liquide ou solide et est soumis à une mesure en utilisant des photodétecteurs (23, 24), par exemple des tubes photomultiplicateurs ou analogues, disposés de part et d'autre de l'échantillon et fonctionnant en simultanéité. Suivant l'invention, on effectue des mesures sur des échantillons asymétriques (14) en déterminant le nombre des impulsions de scintillation simultanées qui sont comptées, en utilisant les deux photodétecteurs (23, 24) disposés de part et d'autre de l'échantillon et fonctionnant en simultanéité, et en déterminant l'amplitude et la répartition des hauteurs des impulsions de scintillation en n'utilisant qu'un seul photodétecteur (23, 24).

公开(公告)号：AU5536790A

公开(公告)日：1991-11-27

申请号：AU5536790

申请日：1990-05-08

Applicant: WALLAC OY

Inventor： SONNE VESA ,  LEHTINEN KAUKO ,  YRJONEN TAPIO

IPC: G01N35/00 ,  G01T1/204

公开(公告)号：AU4642889A

公开(公告)日：1990-06-26

申请号：AU4642889

申请日：1989-12-01

Applicant: WALLAC OY

Inventor： LEHTINEN KAUKO ,  YRJONEN TAPIO

IPC: G01T1/172 ,  G01T1/204

Abstract: PCT No. PCT/FI89/00220 Sec. 371 Date May 31, 1991 Sec. 102(e) Date May 31, 1991 PCT Filed Dec. 1, 1989 PCT Pub. No. WO90/06526 PCT Pub. Date Jun. 14, 1990.The counting error due to variations in the counting efficiency as a function of the volume of the sample is corrected. The sample is placed into a sample container which is placed into a vertically positioned cylinder shaped counting chamber. Photomultiplier tubes are disposed on the opposite ends of the counting chamber. At least two of the following spectra are measured in the coincidence counting: the sum spectrum q observed by both of the photomultiplier tubes, the spectrum q(y) observed by the upper photomultiplier tube and the spectrum q(a) observed by the lower photomultiplier tube. The counting error is corrected by the correction coefficient obtained from these spectra.

公开(公告)号：AU4642289A

公开(公告)日：1990-06-26

申请号：AU4642289

申请日：1989-12-01

Applicant: WALLAC OY

Inventor： YRJONEN TAPIO ,  OSTRUP JAN

IPC: G01T1/204 ,  G01T7/00

Abstract: PCT No. PCT/FI89/00221 Sec. 371 Date May 31, 1991 Sec. 102(e) Date May 31, 1991 PCT Filed Dec. 1, 1989 PCT Pub. No. WO90/06527 PCT Pub. Date Jun. 14, 1990.A method for correction of the counting error in liquid scintillation counting in the attenuation of light passing through a sample solution is measured before or after the actual liquid scintillation counting takes place. By means of the attenuation measurement the error in the liquid scintillation counting result, caused by the colorness of the sample solution, and/or by the counting apparatus, is corrected. The apparatus has a liquid scintillation counter provided with cylinder shaped optics. A photometer is incorporated in the liquid scintillation counter. By means of the photometer, the attenuation of light passing through the sample solution is measured before or after the actual liquid scintillation counting measurement, where said attenuation is caused by the colorness of the sample solution and/or due to features of the apparatus.

公开(公告)号：AU5745990A

公开(公告)日：1992-01-07

申请号：AU5745990

申请日：1990-06-15

Applicant: WALLAC OY

Inventor： YRJONEN TAPIO ,  KOURU HEIKKI

IPC: G01T1/204

公开(公告)号：AU4642389A

公开(公告)日：1990-06-26

申请号：AU4642389

申请日：1989-12-01

Applicant: WALLAC OY

Inventor： OIKARI TIMO ,  YRJONEN TAPIO

IPC: G01T1/203 ,  G01T1/204 ,  G01T1/20

公开(公告)号：AU4416589A

公开(公告)日：1990-05-01

申请号：AU4416589

申请日：1989-10-09

Applicant: WALLAC OY

Inventor： OIKARI TIMO ,  YRJONEN TAPIO ,  LEHTINEN KAUKO

IPC: B01L3/00 ,  G01N33/543 ,  G01N33/60 ,  G01T1/203