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Table 1 Identification of the oligosaccharide products identified in the extracts by HRMS performance based on the theoretical and experimental values of m/z. The optimization and quantification were optimized by using stachyose and raffinose

From: Acid hydrolysis of spent coffee grounds: effects on possible prebiotic activity of oligosaccharides

Number of hexoses

Oligosaccharide products

m/z theoretical

m/z experimental

Retention time (min)

3

Trisaccharide

503.16

503.16

5.5

4

Tetrasaccharide

665.21

665.22

5.3

5

Pentasaccharide

827.23

827.27

5.1

6

Hexasaccharide

989.32

989.32

5.3

7

Heptasaccharide

1151.37

Not found

–