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Table 5 Tandem mass spectrometric results of various standards

From: Reduced levels of hydroxylated, polyunsaturated ultra long-chain fatty acids in the serum of colorectal cancer patients: implications for early screening and detection

Standard

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

[M-H]-(%)

335 (45%)

319 (100%)

319 (100%)

429 (14%)

415 (28%)

445 (90%)

445 (68%)

429 (100%)

445 (64%)

397 (6%)

385 (2%)

397 (5%)

451 (28%)

287 (1%)

431 (100%)

*Chain cut ions (%)

219 (15%)

219 (80%)

203 (3%)

            
  

201 (1%)

203 (15%)

163 (25%)

            
  

115 (100%)

175 (55%)

155 (60%)

            
   

113 (20%)

127 (10%)

            
    

111 (5%)

            

*Peripheral cut ions (%)

Loss of H 2 O

317 (16%)

301 (60%)

301 (55%)

  

427 (50%)

 

401 (30%)

401 (28%)

379 (10%)

367 (18%)

379 (5%)

 

269 (1%)

413 (1%)

 

Loss of 2H 2 O

299

              
 

Loss of CO 2

291 (2%)

275 (20%)

275 (4%)

  

401 (1%)

401 (35%)

        
 

Loss of CO 2 and H 2 O

273 (6%)

257 (70%)

257 (80%)

            
 

*Loss of CO 2 and 2H 2 O

               
 

*Loss of 3H 2 O

               

Secondary daughter ions (%)

189 (1%)

167 (5%)

291 (1%)

414 (5%)

400 (78%)

295 (70%)

386 (52%)

163 (100%)

386 (43%)

309 (5%)

273 (3%)

295 (5%)

436 (10%)

187 (5%)

399 (100%)

  

163 (1%)

149 (2%)

171 (1%)

163 (100%)

175 (13%)

149 (90%)

179 (60%)

135 (20%)

179 (50%)

213 (15%)

259 (25%)

253 (6%)

241 (21%)

173 (10%)

393 (40%)

  

145 (2%)

121 (20%)

107 (1%)

135 (8%)

149 (100%)

136 (100%)

135 (100%)

218 (5%)

166 (20%)

201 (30%)

255 (15%)

211 (12%)

227 (62%)

159 (18%)

373 (40%)

  

99 (1%)

99 (1%)

59 (1%)

 

121 (90%)

121 (20%)

107 (25%)

123 (5%)

135 (100%)

173 (37%)

213 (20%)

159 (20%)

223 (48%)

145 (28%)

355 (40%)

  

95 (1%)

59 (1%)

      

122 (25%)

159 (35%)

173 (47%)

161 (15%)

213 (55%)

119 (15%)

337 (20%)

  

71 (1%)

       

107 (25%)

107 (90%)

161 (52%)

147 (20%)

199 (57%)

105 (20%)

223 (40%)

  

59 (1%)

        

81 (68%)

159 (75%)

107 (25%)

187 (100%)

95 (36%)

85 (40%)

           

69 (100%)

149 (40%)

105 (15%)

185 (52%)

93 (28%)

 
            

147 (72%)

95 (38%)

171 (55%)

81 (58%)

 
            

107 (100%)

93 (17%)

71 (86%)

69 (100%)

 
            

81 (82%)

83 (25%)

   
             

81 (40%)

   
             

36 (100%)

   
  1. *This terminology is specific to fatty acid fragmentation.
  2. 5S,6S-(7E,9E,11Z,14Z)-dihydroxyeicosatetraenoic acid (1), 15S-Hydroxy-(5Z,8Z,11Z,13E)-eicosatetraenoic acid (2) and 8R-Hydroxy-(5Z,9E,11Z,14Z)-eicosatetraenoic acid (3) (Table 6), α-tocopherol (4) γ-tocopherol (5), 13-(6-hydroxy-2,7,8-trimethylchroman-2-yl)-2,6,10-trimethyltridecanoic acid (6), 16-(4,5-dimethyl-3,6-dioxo cyclohexa-1,4-dienyl)-2,6,10,14-tetramethylhexadecanoic acid (7), 6-hydroxy-2,7-dimethyl-2-(4,8,12-trimethyltridecyl)chroman-8-carbaldehyde (8), 6-hydroxy-2,7-dimethyl-2-(4,8,12-trimethyltridecyl)chroman-8-carboxylic acid (9), calciferol (10), cholecalciferol (11), ergosterol (12), phylloquinone (13), retinol (14) and 3β,7α-dihydroxy-5-cholestenoic acid (15).
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