Capillary electrophoresis is a technique that can be automated for the
separation of charged particles. By investigating suitable sample dil
ution and injection time and adhering to a strict washing procedure we
have been able to quantify paraproteins in serum samples. This has en
abled us to use the technique of capillary electrophoresis for the pro
vision of serum protein electrophoresis in a routine clinical laborato
ry. We present our findings of 260 serum samples, which included 76 sa
mples with paraproteins analysed by both capillary electrophoresis (EC
) and high resolution agarose gel electrophoresis (HRAGE). CE was able
to detect all the monoclonal bands detected by HRAGE, and, in particu
lar, better able to detect IgA monoclonal bands occurring in the beta
region. The major advantages of CE over HRAGE relate to the automated
nature of CE with the elimination of the need for a densitometer.