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Journal of Analytical Science and Technology

Table 1 Comparisons of ten phenolic compounds identified from EEP samples using UPLC and UPLC/FT-ICR MS

From: UPLC/FT-ICR MS-based high-resolution platform for determining the geographical origins of raw propolis samples

No.

Compound

RT (min)

MW

UPLCa

UPLC/FT-ICR MSb

Brazil

China

Korea

K/B

K/C

Brazil

China

Korea

K/B

K/C

1

Cinnamic acid

9.8

148.05

N.D

1.7

0.2

N/A

0.1

N.D

N.D

N.D

N/A

N/A

2

Coumaric acid

4.8

164.05

25

0.8

1.5

0.1

1.9

O

O

O

Unique

Unique

3

Caffeic acid

3.5

180.04

7

N.D

4.5

0.6

N/A

O

O

O

Unique

Unique

4

Chrysin

14.5

254.06

1.2

16.7

14.1

11.8

0.8

O

O

O

Unique

0.8

5

Pinocembrin

14.9

256.07

10.4

8.3

6.4

0.6

0.8

O

O

O

1.1

1.1

6

CAPE

15.6

284.10

5.3

3.2

13.9

2.6

4.3

O

O

O

7.8

4.3

7

Kaempferol

11.0

286.05

2.3

1

0.4

0.2

0.4

O

O

O

-0.4

1.1

8

Artepillin C

17.7

300.17

104.5

16.8

N.D

N/A

N/A

O

O

O

1.8

2.2

9

Quercetin

9.5

302.04

1.9

0.6

0.3

0.2

0.5

O

O

O

0.3

2.0

10

Rutin

5.6

610.15

N.D

N.D

N.D

N/A

N/A

N.D

N.D

N.D

2.2

0.6

  1. N.D not detected, N/A not applicable
  2. aThe values were the concentration of each component (μmoL/mL of EEP extract exhibiting 1% of the total flavonoid quantity) estimated using UPLC
  3. bThe values were the log2-transformed intensities of each component observed using FT-ICR MS
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