Why is stability relatively short after opening?
Indeed the product is stable during at least 15 weeks after first opening. 15 weeks is quite high : that means less than 2 tests per week. Stability is dependant of the storage conditions. Immunochromatographic test uses nitrocellulosic support which is sensitive to humidity. That’s why we put dessicant in the tube and in the cap. If the storage is done under dry condition, stability is higher than 15 weeks. In each case, there is an internal control (upper line). If this internal control appears during the run, that means that the test is running well. We have to give a shelf life, but the test can be used after 15 or 20 weeks. The result will be valid if the control line appears.
