@article {Little166, author = {Angela C. Little}, title = {Pigment Analysis in Red and Ros{\'e} Wines by Tristimulus Colorimetry}, volume = {28}, number = {3}, pages = {166--170}, year = {1977}, doi = {10.5344/ajev.1977.28.3.166}, publisher = {American Journal of Enology and Viticulture}, abstract = {The pigment composition of red and ros{\'e} wines was determined by tristimulus colorimetry using the thin-layer transreflectometric technique at two pH levels. The magnitude of change on acidification in chromaticity coordinates, expressed as (Δr2 + Δg2)1/2, and in blue transreflectance, expressed as Δ-log B, provide quantitative measures of pH-responsive anthocyanin pigment. The Δ-log B readings can be interpreted in terms of the contribution to total absorption by the pH-responsive and pH-non-responsive absorbing components.}, issn = {0002-9254}, URL = {https://www.ajevonline.org/content/28/3/166}, eprint = {https://www.ajevonline.org/content/28/3/166.full.pdf}, journal = {American Journal of Enology and Viticulture} }