Antioxidant efficiency of polyphenols from coffee and coffee substitutes-electrochemical versus spectrophotometric approach

Antioxidant (AO) capacity of instant, espresso, filter and Turkish/Greek coffee brews, coffee substitutes (roasted chicory root, barley, pea, chickpea, carob and dried fig) and individual compounds (phenolic acids, flavonoids, methylxanthines, N-methyl pyridinium and HMW melanoidins) was assessed us...

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Veröffentlicht in:Journal of food science and technology 2017-07, Vol.54 (8), p.2324-2331
Hauptverfasser: Gorjanović, Stanislava, Komes, Draženka, Laličić-Petronijević, Jovanka, Pastor, Ferenc T., Belščak-Cvitanović, Ana, Veljović, Mile, Pezo, Lato, Sužnjević, Desanka Ž.
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container_issue 8
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container_title Journal of food science and technology
container_volume 54
creator Gorjanović, Stanislava
Komes, Draženka
Laličić-Petronijević, Jovanka
Pastor, Ferenc T.
Belščak-Cvitanović, Ana
Veljović, Mile
Pezo, Lato
Sužnjević, Desanka Ž.
description Antioxidant (AO) capacity of instant, espresso, filter and Turkish/Greek coffee brews, coffee substitutes (roasted chicory root, barley, pea, chickpea, carob and dried fig) and individual compounds (phenolic acids, flavonoids, methylxanthines, N-methyl pyridinium and HMW melanoidins) was assessed using DC polarographic assay based on decrease of anodic current originating from hydroxo-perhydroxo mercury complex formed in alkaline solutions of H 2 O 2 at potential of mercury dissolution, as well as three spectrophotometric assays (DPPH, ABTS and FRAP). A large difference between applied assays ability to recognize various types of individual AOs was noticed. Only according to DC polarographic assay significant AO activity was ascribed to methylxanthines and N-methyl pyridinum. The total content of phenolics (TPC) present in complex samples was determined by FC assay. The highest TPC was ascribed to instant coffees and coffee substitutes while the lowest to decaffeinated filter coffee. Complex samples were grouped based on principal components analysis, phenolics AO coefficient, calculated as the ratio between AO capacity and TPC, and relative AO capacity index (RACI), calculated by assigning equal weight to all applied assays including FC. The highest values of RACI were ascribed to instant coffee brews, followed by substitutes while the lowest to the decaffeinated espresso coffee.
doi_str_mv 10.1007/s13197-017-2672-y
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A large difference between applied assays ability to recognize various types of individual AOs was noticed. Only according to DC polarographic assay significant AO activity was ascribed to methylxanthines and N-methyl pyridinum. The total content of phenolics (TPC) present in complex samples was determined by FC assay. The highest TPC was ascribed to instant coffees and coffee substitutes while the lowest to decaffeinated filter coffee. Complex samples were grouped based on principal components analysis, phenolics AO coefficient, calculated as the ratio between AO capacity and TPC, and relative AO capacity index (RACI), calculated by assigning equal weight to all applied assays including FC. The highest values of RACI were ascribed to instant coffee brews, followed by substitutes while the lowest to the decaffeinated espresso coffee.</description><subject>Antioxidants</subject><subject>Assaying</subject><subject>Barley</subject><subject>Carob</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Chemistry/Food Science</subject><subject>Chicory</subject><subject>Coffee</subject><subject>Direct current</subject><subject>Dissolution</subject><subject>Electrochemistry</subject><subject>Flavonoids</subject><subject>Food Science</subject><subject>Hydrogen peroxide</subject><subject>Instant coffee</subject><subject>Mathematical analysis</subject><subject>Melanoidins</subject><subject>Mercury</subject><subject>Mercury (metal)</subject><subject>Nutrition</subject><subject>Original</subject><subject>Original Article</subject><subject>Phenolic acids</subject><subject>Phenols</subject><subject>Polyphenols</subject><subject>Principal components analysis</subject><subject>Pyridinium</subject><subject>Spectrophotometry</subject><subject>Studies</subject><issn>0022-1155</issn><issn>0975-8402</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp1kU9r3jAMxsPYaEvXD9DLCOyySzrLsWPnMihlfwqFXraz8evIjUtiZ7ZTFvbl5_ZtSzeYLxbST48knqo6BXIGhIiPCVroRUNANLQTtNleVUekF7yRjNDXJSaUNgCcH1YnKd2S8loqJCUH1SGVokCyP6p-n_vswi83aJ9rtNYZh95sdbD1EqZtGdGHKdU2hrk2wVrEWvvhKUzrLmWX14ypwQlNjsGMODujp_oOY1pTnZaH9DKGHGbM0ZlaL0sM2oxvqzdWTwlPHv_j6seXz98vvjVX118vL86vGsMEyQ3rdMdoy3vBuObSUsZJ28pBg5QMux21wgB2wHTbDoxqHDRtQQIfpICekfa4-rTXXdbdjINBn6Oe1BLdrOOmgnbq74p3o7oJd4pzQgnlReDDo0AMP1dMWc0uGZwm7TGsSUFfBgIjwAr6_h_0NqzRl_MKBQLKzkIWCvaUiSGliPZ5GSDq3l21d1cVd9W9u2orPe9eXvHc8eRlAegeSKXkbzC-GP1f1T-02LMn</recordid><startdate>20170701</startdate><enddate>20170701</enddate><creator>Gorjanović, Stanislava</creator><creator>Komes, Draženka</creator><creator>Laličić-Petronijević, Jovanka</creator><creator>Pastor, Ferenc T.</creator><creator>Belščak-Cvitanović, Ana</creator><creator>Veljović, Mile</creator><creator>Pezo, Lato</creator><creator>Sužnjević, Desanka Ž.</creator><general>Springer India</general><general>Springer Nature B.V</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>04Q</scope><scope>04S</scope><scope>04W</scope><scope>3V.</scope><scope>7QL</scope><scope>7QO</scope><scope>7QR</scope><scope>7RQ</scope><scope>7ST</scope><scope>7T7</scope><scope>7TM</scope><scope>7WY</scope><scope>7WZ</scope><scope>7X2</scope><scope>7XB</scope><scope>87Z</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>8FK</scope><scope>8FL</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>BENPR</scope><scope>BEZIV</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FR3</scope><scope>FRNLG</scope><scope>F~G</scope><scope>HCIFZ</scope><scope>K60</scope><scope>K6~</scope><scope>L.-</scope><scope>L6V</scope><scope>M0C</scope><scope>M0K</scope><scope>M7S</scope><scope>P64</scope><scope>PQBIZ</scope><scope>PQBZA</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>Q9U</scope><scope>SOI</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20170701</creationdate><title>Antioxidant efficiency of polyphenols from coffee and coffee substitutes-electrochemical versus spectrophotometric approach</title><author>Gorjanović, Stanislava ; 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A large difference between applied assays ability to recognize various types of individual AOs was noticed. Only according to DC polarographic assay significant AO activity was ascribed to methylxanthines and N-methyl pyridinum. The total content of phenolics (TPC) present in complex samples was determined by FC assay. The highest TPC was ascribed to instant coffees and coffee substitutes while the lowest to decaffeinated filter coffee. Complex samples were grouped based on principal components analysis, phenolics AO coefficient, calculated as the ratio between AO capacity and TPC, and relative AO capacity index (RACI), calculated by assigning equal weight to all applied assays including FC. The highest values of RACI were ascribed to instant coffee brews, followed by substitutes while the lowest to the decaffeinated espresso coffee.</abstract><cop>New Delhi</cop><pub>Springer India</pub><pmid>28740289</pmid><doi>10.1007/s13197-017-2672-y</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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subjects Antioxidants
Assaying
Barley
Carob
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Chicory
Coffee
Direct current
Dissolution
Electrochemistry
Flavonoids
Food Science
Hydrogen peroxide
Instant coffee
Mathematical analysis
Melanoidins
Mercury
Mercury (metal)
Nutrition
Original
Original Article
Phenolic acids
Phenols
Polyphenols
Principal components analysis
Pyridinium
Spectrophotometry
Studies
title Antioxidant efficiency of polyphenols from coffee and coffee substitutes-electrochemical versus spectrophotometric approach
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