Question

1) GC-MS of your sample will result in a total ion chromatogram and a mass spectrum. Explain the information that each contains and label the axes.

a) Total Ion Chromatogram

b)Mass Spectrum

2) Antihistamine contains one of the active ingrediants below. Draw the chemical structure and give the expected m/z for the molecular ion.

a) Cetirizine b) Loratadine c) Diphemhydramine d) Chlorphenamine

Answer 1

1) In case of total ion chromatogram

          Along X axis we plot the retention time.

          Along Y axis we plot Total ion concentration

In case of mass spectrum

          Along X axis we plot m/z value.

         Along axis we plot relative abundance.

2)