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Clinical Chemistry 28: 699-701, 1982;
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Clinical Chemistry, Vol 28, 699-701, Copyright © 1982 by American Association for Clinical Chemistry

Versatile semiautomated sample processor and gamma counter to increase radioimmunoassay efficiency

R Vihko, N Bolton, GL Hammond, C Kankkunen, L Koskinen, A Martio, E Soini and R Vaintola

We describe a semiautomated batch-assay system designed to increase the speed and ease of performing radioimmunoassays while maintaining good accuracy and precision. The main components are a programmable pipetting unit (sample processor) and a gamma counter capable of simultaneously counting radioactivity in 12 samples. The processor uses prearranged sets of as many as 24 disposable pipette tips, which eliminates carryover between samples, and features a horizontal shaker and magnetic stirrer; 50 different assay protocols can be selected. Batches of tubes are easily transferred from the sample processor to the incubator and centrifuge. The gamma counter is controlled by a microprocessor, which is also used for data processing. Because the system is based on discrete rather than continuous-flow analysis and because of the ease with which consecutive samples can be processed, more than one operation and several different assays can be accommodated simultaneously, which saves time considerably.




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Copyright © 1982 by the American Association for Clinical Chemistry.