Lateral flow collodial gold  tests called lateral flow immunochromatographic assays or rapid tests, are simple devices intended to detect the presence of a target substance in a liquid sample without the need for specialized and costly equipment. These tests are widely used in medical diagnostics for home testing, point of care testing, or laboratory use. For instance, the home pregnancy test is an rapid test  that detects a certain hormone. These tests are simple, economic and generally show results in around five to 30 minutes. Some usage  increase the sensitivity of simple by employing additional dedicated equipment.