# Evaluation of a New Bulk Packaging Container for the Ripening of Feta Cheese
## 3 Results and Discussion
### Volatile Compounds of Feta Cheeses
\({}^{\circ}\) & 1468.5 \(\pm\) 590.6 \({}^{\circ}\) & 1558.3 \(\pm\) 77.8 \({}^{\circ}\) \\
1-Propand & 538 & 554 & nd & nd & 145.5 \(\pm\) 5.2 \({}^{\circ}\) & 8.3 \(\pm\) 2.3 \({}^{\circ}\) & nd & \({}^{\circ}\) & nd \\
1-Blunden & 649 & 669 & 46.7 \(\pm\) 12.7 \({}^{\circ}\) & 158.8 \(\pm\) 7.4 \({}^{\circ}\) & 1382.9 \(\pm\) 185.6 \({}^{\circ}\) & 3415.2 \(\pm\) 62.1 \({}^{\circ}\) & 366.6 \(\pm\) 140.0 \({}^{\circ}\) & 3923.9 \(\pm\) 185.5 \({}^{\circ}\) & 3303.9 \(\pm\) 35.8 \({}^{\circ}\) \\
1-Butanet 3-methyl- & 726 & 736 & nd & nd & nd & 306.7 \(\pm\) 33.1 \({}^{\circ}\) & 608.0 \(\pm\) 170.8 \({}^{\circ}\) & 1068.9 \({}^{\circ}\) 223.6 \({}^{\circ}\) & 5238.8 \({}^{\circ}\) \\
2-Methyl & 730 & 748 & nd & nd & nd & 306.7 \(\pm\) 33.1 \({}^{\circ}\) & 608.0 \(\pm\) 170.8 \({}^{\circ}\) & 1068.9 \({}^{\circ}\) 223.6 \({}^{\circ}\) & 5238.8 \({}^{\circ}\) \\
1-Femund & 757 & 765 & 73.8 \(\pm\) 8.2 \({}^{\circ}\) & 213.4 \(\pm\) 16.9 \({}^{\circ}\) & 1313.2 \({}^{\circ}\) & 48.5 \(\pm\) 12.0 \({}^{\circ}\) & 308.9 \(\pm\) 7.0 \({}^{\circ}\) & 326.4 \({}^{\circ}\) \\
1-Hexanol & 899 & 862 & 344.4 \(\pm\) 15.5 & nd & nd & 30 & 44.0 \(\pm\) 49.4 \({}^{\circ}\) & nd \\ Subtotal & & & & & & & & & \\ \hline \multicolumn{1}{c}{Ketens} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\
2-Butanetione & 574 & 584 & nd & 170.9 \(\pm\) 9.5 \({}^{\circ}\) & nd & nd & nd & nd & nd \\
2-Butaneto & 3-hydroxy & 703 & 77 & 253.6 \(\pm\) 39.7 \({}^{\circ}\) & 1645.9 \(\pm\) 85.0 \({}^{\circ}\) & 103.8 \(\pm\) 10.6 \({}^{\circ}\) & 48.9 \(\pm\) 14.6 \({}^{\circ}\) & 190.4 \(\pm\) 8.0 \({}^{\circ}\) & 318.5 \(\pm\) 50.4 \({}^{\circ}\) & 284.4 \({}^{\circ}\) \\
2-Hepunar & 881 & 888 & 88 & 8 & nd & nd & nd & 124.2 \(\pm\) 2.4 \({}^{\circ}\) & nd & nd & nd \\ Subtotal & & & & & & & & & \\ \hline \multicolumn{1}{c}{Alcohols} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\ \hline \multicolumn{1}{c}{Butanet 3-methyl-} & 645 & 650 & nd & nd & nd & 8.3 \(\pm\) 4.4 & nd & nd & nd \\ Hexanol & 739 & 810 & 886.9 \(\pm\) 370.8 \({}^{\circ}\) & 796.6 \({}^{\circ}\) 262.5 \({}^{\circ}\) & 495.9 \(\pm\) 143.9 \({}^{\circ}\) & 608.9 \(\pm\) 25.4 \({}^{\circ}\) & 609.3 \(\pm\) 25.4 \({}^{\circ}\) & 602.3 \(\pm\) 2.9 \({}^{\circ}\) & 1933.3 \(\pm\) 71.4 \({}^{\circ}\) & 2257.5 \(\pm\) 23.7 \({}^{\circ}\) \\
2-Hexanol & 848 & 854 & 262.1 \({}^{\circ}\) & 248.6 \(\pm\) 15.0 \({}^{\circ}\) & 66.4 \({}^{\circ}\) & 284.4 \({}^{\circ}\) & 58.9 \({}^{\circ}\) & 43.1 \({}^{\circ}\) & nd & nd \\ Pentral & 609 & 695 & 59.7 \(\pm\) 16.5 \({}^{\circ}\) & 40.6 \(\pm\) 8.2 \({}^{\circ}\) & 172.2 \({}^{\circ}\) & 28.4 \({}^{\circ}\) & 28.4 \({}^{\circ}\) & 49.5 \({}^{\circ}\) & 43.1 \({}^{\circ}\) & nd & nd \\ \multicolumn{1}{c}{\(n\)-Hepunar & 895 & 899 & 678.0 \(\pm\) 220.6 \({}^{\circ}\) & 4840.0 \({}^{\circ}\) & 190.1 \({}^{\circ}\) & 269.6 \(\pm\) 23.5 \({}^{\circ}\) & 359.9 \(\pm\) 14.1 \({}^{\circ}\) & 192.7 \({}^{\circ}\) & 33.3 \({}^{\circ}\) & 122.1 \(\pm\) 28.0 \({}^{\circ}\) & 88.6 \({}^{\circ}\) \\ Octanal & 997 & 1002 & 142.4 \(\pm\) 4.6 & nd & nd & nd & nd & nd & nd \\ Nonanal & 1008 & 1104 & & 325.8 \(\pm\) 8.2 \({}^{\circ}\) & nd & nd & nd & nd & nd & nd \\ Subtotal & & & & & & & & & & \\ \hline \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\ Subtotal & & & & & & & & & & & & \\ \hline \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{  
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\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Compound** & **Reye** & **Rkin** & **1** & **2** & **7** & **40** & **60** & **80** & **100** \\ \hline \multicolumn{1}{c}{Alcohols} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\ Ethanol & \(<\)500 & 427 & \(72.2\pm 6.4^{*}\) & md & 129.5\(\pm\) 11.2\({}^{*}\) & 1057.5\(\pm\) 320.4\({}^{*}\) & 1746.6\(\pm\) 179.2\({}^{*}\) & 1353.6\(\pm\) 272.0\({}^{*}\) & 1420.9\(\pm\) 118.3\({}^{*}\) \\
1-Propanol & 588 & 554 & md & md & md & md & 53.8\(\pm\) 6.0\({}^{*}\) & 66.9\(\pm\) 13.4\({}^{*}\) & 38.6\(\pm\) 97.7\({}^{*}\) \\
3-Methyl-1-butanol & 726 & 736 & md & md & 51.8\(\pm\) 8.9\({}^{*}\) & 282.6\(\pm\) 246.6\({}^{*}\) & 796.3\(\pm\) 135.6\({}^{*}\) & 503.7\(\pm\) 101.2\({}^{*}\) & 2185.8\(\pm\) 95.5\({}^{*}\) \\
1-Butanol & 649 & 649 & 416.1\(\pm\) 37.4\({}^{*}\) & md & 130.8\(\pm\) 13.9\({}^{*}\) & 194.2\(\pm\) 101.8\({}^{*}\) & md & 1901.0\(\pm\) 28.2\({}^{*}\) \\
1-Pathenol & 757 & 765 & 34.8\(\pm\) 3.0\({}^{*}\) & 263.3\(\pm\) 45.7\({}^{*}\) & 27.8\(\pm\) 48.8\({}^{*}\) & md & md & md & md \\
1-Hexanol & 859 & 862 & md & md & md & 103.1\(\pm\) 8.6\({}^{*}\) & md & md \\ Subtotal & & & & 1486.6 \(\pm\) 4.6 & 26.3\(\pm\) 4.5 & 339.9\(\pm\) 10.2 & 1340.1\(\pm\) 142.8 & 2833.2\(\pm\) 110.7 & 2135.2\(\pm\) 167.7 & 1868.1\(\pm\) 65.8 \\ \hline \multicolumn{1}{c}{Ketoons} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\ \hline
2-Butanone, 3-hydroxy-2 & 703 & 717 & \(415.4\pm 69.7^{*}\) & \(167.4\pm 28.9^{*}\) & \(46.7\pm 44.8^{*}\) & md & md & \(756.6\pm 55.3\) & md \\
2-Hepstone & 881 & 888 & md & md & 8.0\(\pm\) 3.9 & md & md & md & md \\ Subtotal & & & & & & & & & \\ Subtotal & & & & & & & & & \\ \hline \multicolumn{1}{c}{Alcohols} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\ \hline Propanal & \(<\)500 & 537 & md & \(21.1\pm 3.6\) & md & md & md & md & md \\ Hexanal & 793 & 810 & \(743.6\pm 26.6^{*}\) & \(715.9\pm 27.2^{*}\) & \(602.2\pm 729.9^{*}\) & \(107.3\pm 45.9^{*}\) & \(274.9\pm 90.2^{*}\) & \(2409.163.3^{*}\) & 160.0\(\pm\) 149.4\({}^{*}\) \\
2-Elevental & 848 & 848 & \(83.1^{*}\) & \(15.6\pm 2.7^{*}\) & \(21.8\pm 2.2^{*}\) & \(0.0\) & \(0.0\) & \(0.0\) & \(0.0\) \\ \(\alpha\)-Hepanal & 895 & 890 & 367.9\(\pm\) 112.4\({}^{*}\) & \(442.5\pm 19.5^{*}\) & \(396.4\pm 17.6^{*}\) & \(70.0\pm 6.0^{*}\) & \(108.1\pm 50.8^{*}\) & \(87.9^{*}\pm 98.1\) & \(66.2^{*}\pm 62.4^{*}\) \\
3-Methyl-butanol & 645 & 650 & md & md & md & 19.8\(\pm\) 3.4\({}^{*}\) & \(0.1\pm 3.0^{*}\) & \(0.1\pm 30.0^{*}\) & \(0.1\pm 30.0^{*}\) & \(0.1\pm 20.0^{*}\) \\ Portland & 690 & 695 & 35.3\(\pm\) 30.0\({}^{*}\) & 39.7\(\pm\) 46.6\({}^{*}\) & \(342.5\pm 5.9^{*}\) & \(97.4\pm 91.5^{*}\) & md & md & md & \(259.4\pm 44.4^{*}\) \\ Nonanal & 1038 & 1104 & md & md & md & 19.0\(\pm\) 3.2 & md & md & md & md \\ Subtotal & & & & & & & & & & & \\ Subtotal & & & & & & & & & & & & \\ \hline \multicolumn{1}{c}{Bars} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\ \hline Butanol acid, methyl ester & 713 & 725 & \(886.6\pm 254.9^{*}\) & \(396.6\pm 137.6^{*}\) & \(340.5\pm 161.2^{*}\) & \(260.3\pm 102.2^{*}\) & \(587.5\pm 128.2^{*}\) & \(588.88\pm 118.1^{*}\) & \(4180.04^{*}\) \\ Butanol acid, methyl ester & 791 & 788 & 804.4\(\pm\) 69.4\({}^{*}\) & \(146.6\pm 56.9^{*}\) & md & & \(375.4\pm 16.0^{*}\) & \(254.5\pm 104.7^  
\begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline
**Compound** & **Reye \({}^{\bullet}\)** & **Rkin \({}^{\bullet\bullet}\)** & & & & & & & & \\ \hline \multicolumn{1}{c}{Hydrocarbons} & & & & & & & & & \\ \hline Cyclopentine & 549 & 563 & \(395\pm 41^{\circ}\) & \(133\pm 13^{\circ}\) & \(118\pm 20^{\circ}\) & nd & \(65.8\pm 132.^{\circ}\) & \(61.7\pm 40.^{\circ}\) & \(6.2\pm 10.^{\circ}\) \\
Both the packaging material and the ripening time affected (\(p<0.05\)) the volatile profiles of the cheeses.