Clinical Chemistry
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Clinical Chemistry 29: 1620-1627, 1983;
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Clinical Chemistry, Vol 29, 1620-1627, Copyright © 1983 by American Association for Clinical Chemistry

Use of a solid-state multihead gamma counter in a second-generation system for solid-phase immunoassay

GH Parsons Jr, CH Rogers, R Polsky-Cynkin, AM Wood, LE Miles and AH Rogers

Simultaneous advances in detector technology and solid-phase separation systems, as well as the availability of powerful desktop computers, have made possible the development of "second-generation" solid-phase immunoassays. These retain the advantages of classical solid phase while significantly accelerating reaction kinetics. Hapten assays--such as for digoxin, thyroxin, and triiodothyronine uptake--in batches of 48 are processed in about 20 min from reagent introduction until hard-copy printout, with minimal operator involvement. The system also functions as a 48-detector gamma counter, capable of counting and reducing data for any 125I-based RIA that can be run in a 12 X 75 mm test tube. System control, data management, and computer screen displays of kinetic data are provided by an unmodified Hewlett Packard HP-87XM computer. User-friendly disc-based software facilitates the creation and storage of counting and data reduction protocols for as many as 30 RIAs from various manufacturers as well as up to 30 of our own assays.




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Copyright © 1983 by the American Association for Clinical Chemistry.