VUESCAN: Possible to set color negative base neutral?

I seem to have the most dificulty using Vuescan with my Nikon IV scanner and
color negative film. I mostly use NPH NPS and 160NC. Scans tend to come out
pink as its very dificult to get accurate skin tones. Is it possible to
somehow have Vuescan measure and set a base setting on a blank, exposed &
developed piece of film and then use that neutral setting to scan an actual
negative?

thanks to all

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