All Volumes should be given with same metrics
vol.act(vol.tot = 1, dfac = 1, delta.E, vol.test, epsilon, cuvette = 1)
total volume, default is 1
dilution factor, default is 1
Delta E (without default)
test volume (without default)
molar attenuation coefficient (without default)
cuvette factor or path length, default is 1