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1. (WO1989012838) SAMPLE PLATE LIQUID SCINTILLATION COUNTER

Pub. No.:    WO/1989/012838    International Application No.:    PCT/SE1989/000353
Publication Date: Dec 28, 1989 International Filing Date: Jun 16, 1989
IPC: G01T 1/204
G01T 7/02
Applicants: WALLAC OY
LEHTINEN, Kauko
YRJÖNEN, Tapio
PHARMACIA AB
SONNE, Vesa
Inventors: LEHTINEN, Kauko
YRJÖNEN, Tapio
SONNE, Vesa
Title: SAMPLE PLATE LIQUID SCINTILLATION COUNTER
Abstract:
The present invention shows a new apparatus in the field of the liquid scintillation counting. The apparatus counts liquid scintillation of corresponding samples directly from the sample plates (10) which comprise several separate sample wells (11) or vials. The apparatus has one or several detectors in order to count one or several samples at a time. The sample plate (10) is placed in the counting position or before the counting position manually or automatically on a rigid plate holder (12) made of photon attenuating material and having holes (13) for the wells of the sample plate (10). The walls (17) of the holes are reflecting or scattering in order to guide the photons from the liquid scintillation sample (16) to the detectors, built of two photomultiplier tubes (14) operating in coincidence and situated on the opposite sides of the holes of the plate holder. The wells of the sample plate can be closed by an adhesive transparent tape (15). The apparatus can be used also for counting gamma radiation emitting samples if the holes of the sample plate are surrounded by gamma radiation sensitive detectors (19).