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Table 7 Tentative identification of main polyphenols in chromatographs of Moringa oleifera fresh and processed Leaf Extract

From: Impact of post harvest treatment on antioxidant activity and phenolic profile of Moringa oleifera lam leaves

No

RT (min.)

Mass (m/z)

Diagnostic fragments

Peak fragment

Fresh

Roasted

Dried

Fermented/Oxidised

Blanched

Identity

1

1.05

 

248; 325; 381; 448; 523; 723

381

✓

✓

✓

✓

  

2

1.36

432

162; 180; 230; 253; 268; 270; 308;

414; 432; 468

Apigenin (270) + glucosyl (162) = 432

414, 432

✓

✓

✓

✓

 

Apigenin glucoside

3

3.18

355

163; 209; 227; 355; 379; 425; 726;

732

Caffeoyl(162) + quinic acid(192) = 354

163

✓

✓

✓

✓

✓

Caffeoylquinic acid (chlorogenic acid)

4

3.78

339

147; 165; 227; 339; 419; 457; 499;

541; 595; 701

Coumaroyl (147)

147

✓

✓

✓

✓

✓

Coumaroylquinic acid

5

4.03

355

147; 163; 177; 209; 341; 355; 369;

579

Caffeoyl(162) + quinic acid(192) = 354

163

✓

✓

✓

✓

✓

Caffeoylquinic acid (chlorogenic acid)

6

4.32

 

163; 209; 227; 295; 322; 340; 457;

511; 557; 577; 595

595

✓

✓

✓

✓

✓

 

7

5.29

611

147; 163; 180; 303; 435; 449; 453;

465; 611

Quercetin (303) + rhamnosyl

(146) = 449

Quercetin(303) + glucosyl(162) = 465

+ rhamnosyl (146) = 611

303

✓

✓

✓

✓

 

Rutin

8

5.56

465

303; 465

Quercetin (303) + glucosyl(162) = 465

303

✓

✓

✓

✓

✓

Isoquercetin (Querctin-3-O-glucoside)

9

5.83

551

303; 551; 635

Quercetin = 303 + Malonyl-glucosyl

(248) = 551

303

✓

✓

✓

✓

✓

Quercetin-3-O-malonyl-glucoside

10

6.02

449

147; 180: 191; 196; 210; 230;

235; 249; 265; 270; 276; 287;

449; 551; 637; 679; 875

Kaempferol

(287) + glucosyl(162) = 449 + 230 = 679

287

✓

✓

✓

✓

✓

Kaempferol-3-O-glucoside

11

6.20 (roasted)

507

180; 187; 205; 222; 303; 327; 345;

507; 529

Glucosyl(162) + acetyl(42) = 204 glucosyl (162) + Na (23) =185

glucose (180) + acetyl(42) = 222

quercetin(303) + acetyl(42) = 345 quercetin(303) + Na(23) = 326

Quercetin(303) + Glucosyl-acetyl(204)

=507 + Na(23) = 530

303

 

✓

   

Quercetin-3-O-acetyl glucoside

(Na salt)

12

6.40

535

287; 535

Kaempferol(287);

Malonyl-glucoside = 248

535–287 = 248

287

✓

✓

✓

✓

 

Kaempferol-3-O-malonyl-glucoside

13

6.82

491

287; 491; 513

Kaempferol(287) +

Glucosyl-acetyl(204) = 491

287

 

✓

   

Kaempferol-3-O-acetylglucoside

543 (Na salt)

14

10.72

593

593

593

✓

    

Quercetin-3-O-rhamnoside

15

  

635; 778; 1269

635

✓

✓

✓

 

✓

 

16

    

✓

  

✓

  

17

    

✓

✓

  

✓

 

18

     

✓

    

19

     

✓