Colour Interval Value Publication Food Name Reference
[ 0.39, 0.52 ) 0.39 mg/100 ml Coffee B Lang R., et al (2006) Development of a stable isotope dilution.... Journal of Agricultural and Food Chemistry 54:5755-5762 PubMed (16881674)
0.45 mg/100 ml Coffee C Lang R., et al (2006) Development of a stable isotope dilution.... Journal of Agricultural and Food Chemistry 54:5755-5762 PubMed (16881674)
[ 0.65, 0.79 ) 0.78 mg/100 ml Coffee A Lang R., et al (2006) Development of a stable isotope dilution.... Journal of Agricultural and Food Chemistry 54:5755-5762 PubMed (16881674)