A few weeks ago, we featured an article about the rapid gluten test RIDA®QUICK Gliadin. This handy gluten test strip can be used for swabbing surfaces directly on-site without any equipment, providing results in only 5 minutes. After sample preparation, the test strip can also be used for testing raw and processed foods. So, the test certainly is practical – but how good are the results? This was recently reviewed by AOAC in an international ring trial.
If you can’t tolerate gluten, you need to be able to rely on the manufacturer to only label foods as gluten-free if the really are. For this reason, raw goods, production areas and finished products must be tested for gluten contamination. Many manufacturers of gluten-free foods use rapid tests (such as our lateral flow test RIDA®QUICK Gliadin) for their allergen management. In other areas, too, the demand for rapid tests is large. However, a frequently asked question refers to the reliability of those tests: Is a rapid test really able to provide reliable results in such a short time?
Generally it can be said that a lateral flow test is a very precise test method. The RIDA®QUICK Gliadin test strips show a good correlation with the official type I method according to the Codex Alimentarius (which is an ELISA test using the R5 antibody). Indeed, the RIDA®QUICK Gliadin achieves good scores both in specificity and in sensitivity: