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| Almeida,Adriana P. de; Alaburda,Janete; Shundo,Luzia; Ruvieri,Valter; Navas,Sandra A.; Lamardo,Leda C. A.; Sabino,Myrna. |
| The aim of this study was to determine the ochratoxin A (OTA) contamination of instant coffee samples collected in the market of the city of São Paulo, Brazil from August to December, 2004. The EN 14133/2003 method, originally developed to quantify OTA in wine, grape juice and beer samples, was evaluated and approved for analyzing OTA in instant coffee samples. OTA was isolated in an immunoaffinity column and quantified by HPLC with fluorescence detection. The established detection and quantification limits were 0.16 and 0.52 ng/g, respectively. The recoveries from spiked samples were 92.6 ± 1.7, 83.7 ± 0.8, and 91.0 ± 1.2 % at levels of 3.0, 5.0, and 8.0 ng/g, respectively. Of a total of 82 samples analised, 81 (98.8%) contained OTA at levels ranging from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ochratoxin A; Instant coffee; Immunoaffinity column; HPLC determination. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200022 |
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| Wuerges,Karla Leticia; Dias,Rafael Carlos Eloy; Viegas,Marcelo Caldeira; Benassi,Marta de Toledo. |
| ABSTRACT The profile of bioactive compounds in coffee brews depends on the coffee bean species and varieties, harvesting and post-harvesting practices, roasting processes, and also on the brewing method. The present research aimed to study the contents of cafestol and kahweol - coffee diterpenes with a known impact on human health - comparing coffee beverages prepared using common brewing methods (filtered, espresso, and instant coffee brews). Filtered (cloth-filtered and paper-filtered), espresso and instant brews were obtained from a medium-roasted Coffea arabica coffee (NY 2). Five genuine replicates of each coffee brew were prepared, and the extracts were lyophilized. A validated UPLC-based method provided the content of diterpenes. The results were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica; Bioactive compounds; Espresso; Filtered coffee brew; Instant coffee. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100410 |
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