Table 43.
Reduction in the total content of total glycoalkaloids (TGA) in S. tuberosum tubers as a result of drying (preceeded by boiling or blanching and cutting steps)
| Studya | Processing step(s) | Number of cultivars | Analytical method | TGA initial content in peeled tuber (mg/kg) | TGA content in processed tuber (mg/kg) | Reduction in TGA content (%) |
|---|---|---|---|---|---|---|
| Rytel et al. (2005) | Drying | 2 | HPLC‐UV |
Cultivar ‘Santana’: 127 (dw)b ‘Innowator’: 141 (dw)b |
Cultivar ‘Santana’: 43 (dw)b ‘Innowator’: 36 (dw)b |
30% Mean of 2 cultivars |
| Mäder et al. (2009) | Drum drying at 160°C | 1 | HPTLC | 67 (dw)b | 29 (dw)b | 57% |
| Rytel (2012a) | Drying (2 h at 160°C) | 1 | HPLC‐UV |
175 (dw) Mean of 4 batches |
65 (dw) Mean of 4 bathces |
63% Mean of 4 batches |
| Rytel (2012b) | Drying (pneumatic) | 1 | HPLC‐UV | 81 (dw)b | 34 (dw)b | 58% |
| Rytel (2012b) | Drying (fluidised bed) | 1 | HPLC‐UV | 81 (dw)b | 31 (dw)b | 62% |
| Rytel (2012b) | Drying (1 h at 120°C) | 3 | HPLC‐UV |
193 (dw) Mean of 3 cultivars |
81 (dw) Mean of 3 cultivars |
62% Mean of 3 cultivars |
| Rytel (2012c) | Drying (1 h at 120°C) (potato dices)a | 3 | HPLC‐UV |
147 (dw) Mean of 3 cultivars |
104 (dw) Mean of 3 cultivars |
29% Mean of 3 cultivars |
| Rytel (2013) | Drying (1 h at 120°C) (potato dices)a | 1 | HPLC‐UV |
169 (dw)b Mean of 2 batches |
113 (dw)b Mean of 2 batches |
33% Mean of 2 batches |
| Rytel (2013) | Drying (1 h at 140°C) (potato dices)a | 1 | HPLC‐UV |
169 (dw)b Mean of 2 batches |
108 (dw)b Mean of 2 batches |
36% Mean of 2 batches |
| Rytel (2013) | Drying (1 h at 160°C) (potato dices)a | 1 | HPLC‐UV |
169 (dw)b Mean of 2 batches |
100 (dw)b Mean of 2 batches |
41% Mean of 2 batches |
| Rytel et al. (2013) | Drying (1 h at 120°C) (potato dices)a | 4 (coloured‐fleshed) | HPLC‐UV |
69 (dw) Mean of 4 cultivars |
49 (dw) Mean of 4 cultivars |
29% Mean of 4 cultivars |
| Rytel et al. (2013) | Drying (1 h at 140°C) (potato dices)a | 4 (coloured‐fleshed) | HPLC‐UV |
69 (dw) Mean of 4 cultivars |
40 (dw) Mean of 4 cultivars |
43% Mean of 4 cultivars |
| Rytel et al. (2013) | Drying (1 h at 160°C) (potato dices)a | 4 (coloured‐fleshed) | HPLC‐UV |
69 (dw) Mean of 4 cultivars |
38 (dw) Mean of 4 cultivars |
46% Mean of 4 cultivars |
| Rytel et al. (2018) | Drying (2 h at 160°C) (potato puree) | 2 (blue‐fleshed) | HPLC‐UV |
Cultivar ‘Valfi’: 97 (dw) ‘Blaue Elise’: 63 (dw) |
Cultivar ‘Valfi’: 51 (dw) ‘Blaue Elise’: 35 (dw) |
46% Mean of 2 cultivars |
TGA: total glycoalkaloids; LC: liquid chromatography; UV: ultraviolet; MS/MS: tandem mass spectrometry; HP: high performance.
Study year is in this case the year of publication.
Experiments were conducted with peeled potatoes, cut into cubes of 10 mm.
Results were presented for α‐solanine and α‐chaconine.
Note: The reduction is given as the percent reduction in the TGA content after peeling.