Comparison of polyfunctional thiol, element, and total essential oil contents in 32 hop varieties from different countries.
Food Chem
; 455: 139855, 2024 Oct 15.
Article
in En
| MEDLINE
| ID: mdl-38833861
ABSTRACT
Volatile thiol 3-mercaptohexan-1-ol (3MH) and particularly 4-mercapto-4-methylpentan-2-one (4MMP) are highly potent flavour compounds in hops. For the determination, a simple and robust stable isotope dilution LC-MS/MS method was developed and applied to 32 hop varieties worldwide from harvest years 2019 and 2020. Limit of detection, precision, and recovery were 0.15 µg/kg, 10%, and 97-108%, respectively. Levels of 3MH and 4MMP ranged from 1.9 to 79.2 µg/kg and from undetectable to 37.1 µg/kg, respectively. Citra, Mosaic, and Strata were rich in both thiols. ICP analyses revealed, that variation of potassium content between the two harvest years was inversely correlated with that of manganese and rubidium (|r| ≥ 0.89) among 12 US varieties excluding Citra and Mosaic. Total essential oil content (0.34-2.7 mL/100 g) was inversely correlated with calcium content (|r| ≥ 0.65). Greatly varying thiol levels depending on variety, region and harvest year might lead to differing flavour results in beer.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sulfhydryl Compounds
/
Oils, Volatile
/
Humulus
Language:
En
Journal:
Food Chem
Year:
2024
Document type:
Article