Journal of Analytical Methods in Chemistry / 2014 / Article / Tab 4

Research Article

Quantification of Caffeoylquinic Acids in Coffee Brews by HPLC-DAD

Table 4

Caffeoylquinic acids (CQAs) content in various types of coffee brewsa.

Class of coffee brews3-CQA4-CQA5-CQATotal CQAsbAs a percentage of total CQA (%)
(mg/L)(mg/L)(mg/L)(mg/L)3-CQA4-CQA5-CQA

Classical coffee brews
 Brews prepared
  using roasted and
  ground Arabica coffee
  Boiled352.57 ± 1.64197.79 ± 2.07194.34 ± 0.99744.70 ± 0.54a47.3426.5626.10
  French310.97 ± 4.05171.48 ± 1.17163.12 ± 0.99645.56 ± 1.71b48.1726.5625.27
  Mocha357.25 ± 15.59198.47 ± 8.31188.32 ± 6.30744.04 ± 4.89a48.0226.6725.31
  Filter307.86 ± 1.97169.72 ± 0.46161.00 ± 1.21638.58 ± 0.75b48.2126.5825.21
 Brews prepared using
  roasted and ground
  Robusta coffee
  Boiled365.44 ± 6.70199.67 ± 3.88206.18 ± 3.59771.29 ± 1.72b47.3825.8926.73
  French320.35 ± 6.94172.85 ± 1.88173.47 ± 2.11666.67 ± 2.86c48.0525.9326.02
  Mocha421.49 ± 7.95225.47 ± 2.85225.97 ± 2.61872.93 ± 3.02a48.2825.8325.89
  Filter296.83 ± 12.60162.02 ± 3.78165.17 ± 3.31624.03 ± 5.23d47.5725.9626.47
Commercial coffee brews
 Capsule coffees
  Capsule A—type 1818.93 ± 4.22444.69 ± 4.78393.20 ± 4.161656.82 ± 0.34a49.4326.8423.73
  Capsule A—type 2710.01 ± 3.77420.11 ± 1.85378.94 ± 0.661509.06 ± 1.57b47.0527.8425.11
  Capsule A—type 3720.50 ± 0.61408.77 ± 4.35370.35 ± 2.111499.63 ± 1.88c48.0527.2624.70
  Capsule A—type 4604.36 ± 5.05349.22 ± 2.43318.57 ± 1.191272.15 ± 1.97e47.5127.4525.04
  Capsule A—type 5369.27 ± 13.98234.95 ± 12.49222.08 ± 1.80826.29 ± 6.65f44.6928.4326.88
  Capsule B356.74 ± 11.87200.84 ± 1.15190.8 ± 1.30748.40 ± 6.14g47.6726.8425.50
  Capsule C688.95 ± 12.36362.20 ± 4.86323.64 ± 6.151374.78 ± 4.61d50.1126.3523.54
 Other pressure methods
  Vending coffee713.64 ± 21.24398.39 ± 3.57409.02 ± 3.611521.05 ± 10.19b46.9226.1926.89
  Pod espresso823.45 ± 9.82436.30 ± 5.64402.30 ± 3.551662.01 ± 3.19a49.5526.2524.20
  Espresso lab-made551.15 ± 27.79337.07 ± 14.93332.13 ± 1.051220.35 ± 13.37c45.1627.6227.22
 Instant coffees
  Instant natural A62.51 ± 2.5151.26 ± 0.3465.38 ± 1.15179.16 ± 1.10c34.8928.6136.50
  Instant natural B100.22 ± 0.7858.56 ± 2.1368.80 ± 0.40227.57 ± 3.31b44.0425.7330.23
  Instant decaffeinated62.78 ± 2.8748.53 ± 2.5860.55 ± 0.54171.86 ± 1.27c36.5328.2435.23
  Instant espresso412.07 ± 5.26278.46 ± 3.26301.32 ± 2.88991.85 ± 1.28a41.5528.0730.38
 Other brews
  Iced coffee44.51 ± 5.2127.82 ± 3.3831.85 ± 3.50104.19 ± 1.02b42.7226.7130.57
  Iced cappuccino17.01 ± 0.4312.57 ± 0.3916.21 ± 0.4945.79 ± 0.05a37.1427.4635.40

The results correspond to the average ± standard deviation of two extractions followed by two times injection.
bIn each class of brew, values with the same letter are not significantly different ().

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