Testing mislabeled malts to see what's what

I have a few barrels of grains that have been mislabeled by one of our employees (now a former employee). I wonder if there is some kind of test that will allow us to determine what grains we have here.

I have a batch of grain that could be either chocolate malt, black patent malt, or roasted barley. A color, texture, shape and size comparison of the kernels with known grains is inconclusive.

Then there's a batch labeled "crystal" but this could be any Lovibond rating from 10L to 120L.

Suggestions, anyone?

Tnx!

// FvW

I would mash, separately, one pound of each at 150°, cool to the same temperature, then assess color and flavor.

And compare against known samples from your usual source.

Offer it at cost to your customers and let them know you dont know exactly what malt it is.