[ABO determination of chewing gum residues].

Tracing for ABH-Antigens on Chewing Gum 14 different chewing gum-brands were examined for their quality as trace carriers. Our examinations of freshly chewed gums resulted in distinction of ABH-antigens without greater difficulties by using absorption/elution and absorption/inhibition techniques. A simple method was developed to pulverize chewing gum for elution of the antigens.