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[General] Why the diagnosis should be tested as soon as possible after the opening of a foil pouch?

<Porosity structure of the nitrocellulose membrane>



Q. Why the diagnosis should be tested as soon as possible after the opening of a foil pouch?



A. Moisture (from air) could affect the test result. Once you open a pouch please continue the test. Do NOT allow the device to expose to air for long time. It is necessary to check the duration of a pouch unsealed, if the test result is unclear.

The lateral-flow based immunochromatography utilizes the antigen-antibody interaction after absorbing the antibody protein against the virus in the specimen on the nitrocellulose membrane. Once the moisture existed in the air is absorbed into the porosity structure of nitrocellulose membrane, the antigen in the urine could not interact properly with the antibody. It is best to perform the test within 10 minutes after the opening of a pouch and it is recommended not to use device that is unsealed for a long time to obtain reliable results.





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