Thermo Xcalibur Qual Browser- injection101 150512200336 [injection101 1505122003

Question

Thermo Xcalibur Qual Browser- injection101 150512200336 [injection101 150512200336.raw] File Edit View Display Grid Actions Tools Window Help injection101_150512200336 05/12/15 20:03:36 MS RT: 3.71 8.76 LILI injection 101150512200336 no file no file no file no file no file no file no file 100 90 80 70 60 55E9 TIC MS njection101 150512200 336 7.49 G 40 30 20 10 5.60 4.02 8.04 5.85 5,97 6.16 6.38 6.61 6.65 6.81 7.01 7.07 7.16 7,167,29 |7,50 7.79 7.29 3.82 3.994.06 4.35 4.44 4.55 4.79 4.88 5.00 5.18 5.40 8.10 8.34 8.56 3.8 4.04.24.44.6 4.8 5.0 5.2 5.4 5.6 5.8 6.0 6.2 6.6.6 6.8 7.0 7.2 7.4 7.6 7.88.08.28.4 8.6 Time (min) injection101-150512200336 #1601-1615 RT: 7.84-7.89 AV: 15 NL: 6.57E8 T: c El Full ms [50.00-450.00 143.09 100 90 80 70 O 60 115.08 o 40 257.15 187.05 30 20 10 55,03 7101 116.11 144.13 170.10 89.05 113.05 188.11 258.18 259.19 281.07 302.12 156.10 171.12 189.11 214.10 242.12 329.06 355.04 378.20 399.19 407.96 429.16 437.27 60 80 100 120 140 160 180 200 220 240 260 280 300 340 360 380 400 440 Mass: 70.72, Intensity: 6.15e+008, Scan Filter: (none) NUM

Explanation / Answer

The interpretation of the Mass spectrum is as below (with respect to MS peaks),

257 is assigned to molecular ion peak for 1-naphthylurethane addition product with the alcohol

187 is due to the loss of (CH3)2CH(CH2)2 from addition product. [M+1-71]

143 is due to loss of an (CH3)2CH(CH2)2OCO group from the addition product molecule, [M-115+1]

115 is due to (CH3)2CH(CH2)2OCO fragment, [M-171]

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