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For a mass spectrometric analysis, the compounds are converted into ___________________

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For a mass spectrometric analysis, the compounds are converted into ___________________

(a) gaseous ions

(b) soluble form

(c) matrix

(d) antibody

The question was posed to me during an interview.

Asked question is from Techniques topic in chapter Techniques in Cell Biology of Cell Biology

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Correct choice is (a) gaseous ions

For explanation I would say: For the mass spectrometric analysis of proteins, they are converted into positively-charged gaseous ions that are accelerated through a curved tube (under the influence of a magnetic field) to a negatively-charged plate.

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