Question

Although these analyzers were invented in the 1940s, they were worthless until soft ionization techniques like MALDI (“MAWL-dee”) became popular in the 2000s. For 10 points each:
[10m] Name these mass analyzers that excite all fragment ions to the same kinetic energy and then measure their velocities over a fixed linear distance.
ANSWER: time-of-flight mass analyzers [or TOF mass spectrometry]
[10e] For every fragmented ion, the measured time-of-flight is used to compute the ratio of the ion’s mass to this quantity.
ANSWER: charge [accept mass-to-charge ratio or m-over-z]
[10h] TOF (“toff”) analyzers are also used by materials scientists as detectors for this technique. This technique uses a charged microscope tip to ionize a surface and detect its molecular composition with excellent spatial resolution.
ANSWER: atom probe tomography [or APT; prompt on tomography]

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Data

TeamOpponentPart 1Part 2Part 3Total
Brown ADuke A1010020
Chicago CCornell B010010
Columbia BHouston A1010020
Cornell AChicago A1010020
Florida BMinnesota B1010020
Georgia Tech AOhio State A1010020
Georgia Tech BPenn State A010010
Harvard AUC Berkeley A1010020
Illinois AWUSTL B0000
Imperial AVanderbilt A010010
Johns Hopkins ARutgers B010010
MIT AColumbia A1010020
Maryland AFlorida A010010
McGill AVirginia A010010
Michigan AUC Berkeley B010010
Minnesota AIndiana A1010020
North Carolina ATexas A1010020
Northwestern AToronto A1010020
Penn ASouth Carolina A010010
Purdue ANYU A1010020
Rutgers AIowa State A1010020
Stanford AWUSTL A1010020
Yale AChicago B1010020
Yale BClaremont A010010