Determine the parent ion, calculate the number of carbons and hydrogens, plus any heteroatom. Interpret your MS by accounting for fragment.

 

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Abundance m/ z--> Scan 266 (4.666 min): UNK#9.D\data.ms 99.2 210000 200000 190000 180000 170000 160000 150000 140000 130000 120000 56.3 110000 100000 90000 80000 70000 60000 50000 40000 30000 20000 10000 32.3 42.3 70.2 50.3 80.2 D 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 Abundance m/ z--> Scan 266 (4.666 min): UNK#9.D\data.ms 99.2 210000 200000 190000 180000 170000 160000 150000 140000 130000 120000 56.3 110000 100000 90000 80000 70000 60000 50000 40000 30000 20000 10000 32.3 42.3 70.2 50.3 80.2 D 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105