The DELFIA® Enhancer is a chelating detergent solution intended for in vitro use in the quantitative determination of terbium (Tb3+) and dysprosium (Dy3+) in dissociation-enhanced time-resolved fluorometry. It is used in combination with DELFIA® Enhancement Solution (prod. no. 1244-104, 1244-105 or 4001-0010) which dissociates all the label ions (e.g. Eu3+, Sm3+ or Tb3+ or Dy3+) used. After possible measurement of Eu3+ and Sm3+, DELFIA Enhanceris added to create fluorescent Tb3+- and Dy3+-chelates for highly sensitive measurement.