The Schumm test (shoom) is a blood test that uses spectroscopy to determine significant levels of methemalbumin in the blood. A positive result could indicate intravascular hemolysis. The Schumm test was named for Otto Schumm, a German chemist who lived in the early 20th century.
A positive test result occurs when the haptoglobin binding capacity of the blood is saturated, leading to heme released from cell free hemoglobin to bind to albumin.
References
Schumm test Wikipedia(Text) CC BY-SA