Methods and apparatus useful in automated performance of immunoassays, in some preferred embodiments, relying upon the sandwich immunoassay technique, are described. Each rack of reaction tubes is uniquely identified by an optical identifier disc which is read by the automatic controller. The assays...http://www.google.com.au/patents/US4816418?utm_source=gb-gplus-sharePatent US4816418 - Method and apparatus for performing automated, multi-sequential immunoassays
