[on-screen: Mass spectrometry]
Liver tissue can provide useful information about toxins in the body before death. Mass spectrometry can find a toxin that may be in the liver cell sample. Observe the preparation and results of the mass spectrmetric analysis.
[on-screen: Tweezers are used to collect a sample of liver tissue from a petri dish. The liver tissue is placed in a small microtube. ]
Step 1: Add the liver to a smll centrifgal tube.
[on-screen: A bottle of reagent and a pipette is used to put reagent into the microtube with the liver tissue.]
Step 2: Add a reagent to the tubes to release any hidden toxins from the liver cells.
[on-screen: The microtube is placed into a large mass spectrometer.]
Step 3: Place the microtubes into the mass spectrometer to reveal any chemicals in the liver tissue.
[on-screen: The results of the spectrometric analysis show a graph with time on the x-axis and percentage on the y-axis. Benzoylecgonine shows at 30% between 1.6 and 1.7 seconds. Cocaethylene shows at 100% at 2.2 and 2.3 seconds. ]
Step 4: Record the results of your mass spectrometric analysis.
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