According to the "Instructions For Use" it is not allowed to exchange buffer between kits. If you face some volume problems, please contact your distributor.  He will provide you with some more vials. Nevertheless, within one product of different lot numbers, the buffer is the same (for instance, exchanging Rota-Strip buffers between lot will not give rise to any problems on the strips).

At present, 4 different kinds of buffers are used in Coris’products, i.e., Giardia Buffer (for Giardia-Strip), Extraction Buffer (for RSV-Strip), HC buffer (for GastroVir-Strip) and Dilution Buffer for all the other products.

Particularly for the GastroVir Kit we received some comments claiming that the Control Line was too faint. The buffer has been improved to allow a better migration of the latex microspheres leading to a better and a more homogeneous signal.  Of course this improvement does not affect the characteristics of the kit (i.e. specificity and sensitivity).