Absolutely! You expect that malic acid levels will be around 1 to 2 g/L in most wine varietals prior to MLF, and in extreme cases it could go above 3 g/L which might cause the response of the SC-55 unit to exceed its linear range. In that case you should repeat the test on a diluted sample – take 5.0 mL of the boiled, reconstituted wine/must sample and dilute it with 5.0 mL DI water. Then take 5 mL of that dilution and add 5 mL Assay Diluent just as you would in the normal procedure. Multiply any calculation, if you are doing quantitative mode, by an additional factor of 2.