Publication detail

The effect of coffee beans roasting on its chemical composition

DIVIŠ, P. POŘÍZKA, J. KŘIKALA, J.

Original Title

Type

journal article in Scopus

Language

English

Original Abstract

Drinking coffee has become part of our everyday culture. Coffee cultivation is devoted to over 50 countries in the world, located between latitudes 25 degrees North and 30 degrees South. Almost all of the world's coffee production is provided by two varieties, called ‘Arabica’ and ‘Robusta’ whereas the share of Arabica is 70% of the world's coffee harvest. Green (raw) coffee can not be used to prepare coffee beverages, coffee beans must first be roasted. Roasting coffee and reaching a certain degree of coffee roasting determine its flavor and aroma characteristics. In the present study the fate of sucrose, chlorogenic acid, acetic acid, formic acid, lactic acid, caffeic acid, total phenolic compounds and 5-hydroxymethylfurfural was studied in coffee (Brazil Cerrado Dulce, 100% Arabica) roasted in two ways (Medium roast and Full city roast). It has been found that almost all sucrose has been degraded (96 – 98%) in both roasting ways. During Medium roast 65% of chlorogenic acid contained in green coffee was degraded while during Full city roast it was 85%. During both Medium and Full city roasting, the formation of acetic acid but especially formic and lactic acid was recorded. The highest concentration of organic acids was recorded at Full City roasting at medium roasting times (3.3 mg.g-1 d.w. acetic acid, 1.79 mg.g-1 d.w. formic acid, 0.65 mg.g-1d.w. lactic acid). The amount of phenolic substances also increased during roasting up to 16.7 mg.g-1 d.w. of gallic acid equivalent. Highest concentrations of 5-hydroxymethylfurfural were measured at medium roasting times at both Medium (0.357 mg.g-1 d.w.) and French city (0.597 mg.g-1 d.w.) roasting temperatures. At the end of roasting, the 5-hydroxymethylfurfural concentration in coffee were 0.237 mg.g-1 d.w. (Medium roast) and 0.095 mg.g-1 d.w. (Full city roast).

Keywords

coffee, roasting, hydroxymethylfurfural, sucrose, organic acids

Authors

DIVIŠ, P.; POŘÍZKA, J.; KŘIKALA, J.

Released

6. 5. 2019

ISBN

1337-0960

Periodical

Potravinarstvo Slovak Journal of Food Sciences

Year of study

Number

State

Slovak Republic

Pages from

344

Pages to

350

Pages count

URL

https://www.scopus.com/record/display.uri?eid=2-s2.0-85083767019&origin=inward&txGid=5db58bc4f8b0c7ca4a4ade523d6c44e4

BibTex

@article{BUT156821,
  author="Pavel {Diviš} and Jaromír {Pořízka} and Jakub {Křikala}",
  title="The effect of coffee beans roasting on its chemical composition",
  journal="Potravinarstvo Slovak Journal of Food Sciences",
  year="2019",
  volume="13",
  number="1",
  pages="344--350",
  doi="10.5219/1062",
  issn="1337-0960",
  url="https://www.scopus.com/record/display.uri?eid=2-s2.0-85083767019&origin=inward&txGid=5db58bc4f8b0c7ca4a4ade523d6c44e4"
}