Impure Blood or Sophka (Serbian: Nečista krv or Sophka) is a novel written by Borisav Stanković. It is concerned with themes of Serbian south, in the reforming in late 19th century.
In 1996 it was made into a film starring Maja Stojanović, Svetlana Raznatovic, Rade Šerbedžija, Ljuba Tadić, Tzvetana Maneva, and others.