The VMSL system incorporates four different kinds of mass spectrometers, each of which is used to study the composition of compounds, such proteins, polymers, or small molecules based on their molecular weight and electric charge. The virtual lab instruments include a MALDI-TOF (matrix-assisted laser desorption ionization time-of-flight) mass spectrometer, a gas chromatograph quadrupole mass spectrometer, an electrospray ionization ion trap mass spectrometer and a magnetic sector mass spectrometer. The VMSL contains four entertaining case studies, such as analyzing an animal blood protein (serum albumin) to eliminate ringers from a species Olympics event. Another case study involves analyzing an unknown anesthetic found in a medical bag thought to belong to a Civil-War era physician. Check it out!