Ouchterlony double immunodiffusion

Ouchterlony double immunodiffusion (also known as agar gel immunodiffusion or passive double immunodiffusion) is an immunological technique used in the detection, identification and quantification of antibodies and antigens, such as immunoglobulins and extractable nuclear antigens. The technique is named for Örjan Ouchterlony, the Swedish physician who invented the test in 1948.