## 3 Results and Discussion
### Volatile Compounds in Mandarin Juices and Juice Powders
\begin{table}
\begin{tabular}{c c c c c c} \hline  & & & & & \\ \cline{2-6}  & **Chlorogenic Acid** & **Hesperidin** & **\(\boldsymbol{p}\)-Cumamic Acid** & **\(\boldsymbol{p}\)-Hydroybenzoic Acid** & **Sinaptic Acid** & **Vanillic Acid** \\ \hline A1 juice & \(9.6\pm 0.17\,\mathrm{{}^{b}}\) & \(44.8\pm 0.72\,\mathrm{{}^{b}}\) & ND \({}^{C}\) & \(65.9\pm 0.92\,\mathrm{{}^{f}}\) & \(489.7\pm 7.6\,\mathrm{{}^{c}}\) & \(44.3\pm 1.1\,\mathrm{{}^{s}}\) \\ A1 powder & \(14.1\pm 0.95\,\mathrm{{}^{c}}\) & \(105.9\pm 0.46\,\mathrm{{}^{h}}\) & ND & \(69.7\pm 0.96\,\mathrm{{}^{s}}\) & \(406.9\pm 15.4\,\mathrm{{}^{b}}\) & \(56.7\pm 2.4\,\mathrm{{}^{g}}\) \\ _At Retention/\(\upgamma\)s_ & \(145.8\,\mathrm{{}^{c}}\) & \(236.4\,\mathrm{{}^{d}}\) & _N/A_ & \(\boldsymbol{105.8}\,\mathrm{{}^{c}}\) & \(\boldsymbol{83.1}\,\mathrm{{}^{c}}\) & \(\boldsymbol{128.0}\,\mathrm{{}^{c}}\) \\ A2 juice & \(13.68\pm 0.14\,\mathrm{{}^{c}}\) & \(46.7\pm 0.19\,\mathrm{{}^{b}}\) & ND & \(70.0\pm 0.46\,\mathrm{{}^{c}}\) & \(554.1\pm 22.2\,\mathrm{{}^{d}}\) & \(48.1\pm 0.15\,\mathrm{{}^{f}}\) \\ A2 powder & \(17.2\pm 0.88\,\mathrm{{}^{d}}\) & \(147.6\pm 3.0\,\mathrm{{}^{i}}\) & ND & \(57.5\pm 2.8\,\mathrm{{}^{s}}\) & \(529.2\pm 25.2\,\mathrm{{}^{d}}\) & \(57.1\pm 0.58\,\mathrm{{}^{s}}\) \\ _A2 Retention/\(\upgamma\)s_ & \(\boldsymbol{125.55}\) & \(316.06\,\mathrm{{}^{c}}\) & N/A & \(\boldsymbol{82.26}\,\mathrm{{}^{c}}\) & \(95.51\,\mathrm{{}^{c}}\) & \(\boldsymbol{118.71}\,\mathrm{{}^{c}}\) \\ A3 juice & \(32.8\pm 0.82\,\mathrm{{}^{f}}\) & \(66.4\pm 1.5\,\mathrm{{}^{e}}\) & ND & \(91.5\pm 1.5\,\mathrm{{}^{e}}\) & \(912.6\pm 9.6\,\mathrm{{}^{e}}\) & \(94.5\pm 1.3\,\mathrm{{}^{h}}\) \\ A3 powder & \(28.8\pm 12\,\mathrm{{}^{i}}\) & \(148.5\pm 0.76\,\mathrm{{}^{i}}\) & ND & \(77.9\pm 4.1\,\mathrm{{}^{h}}\) & \(664.5\pm 43.9\,\mathrm{{}^{e}}\) & \(105.6\pm 1.0\,\mathrm{{}^{i}}\) \\ A3 _Retention/\(\upgamma\)s_ & \(\boldsymbol{87.80}\,\mathrm{{}^{c}}\) & \(\boldsymbol{223.64}\,\mathrm{{}^{d}}\) & _N/A_ & \(\boldsymbol{85.44}\,\mathrm{{}^{d}}\) & \(\boldsymbol{72.81}\,\mathrm{{}^{d}}\) & \(\boldsymbol{109.63}\,\mathrm{{}^{c}}\) \\ RS1 juice & \(8.4\pm 0.05\,\mathrm{{}^{a}}\) & \(15.0\pm 0.27\,\mathrm{{}^{a}}\) & \(0.80\pm 0.05\,\mathrm{{}^{a}}\) & \(19.3\pm 0.72\,\mathrm{{}^{k}}\) & \(8.7\pm 0.46\,\mathrm{{}^{a}}\) & \(4.6\pm 0.09\,\mathrm{{}^{a}}\) \\ RS1 powder & \(18.9\pm 0.37\,\mathrm{{}^{a}}\) & \(88.6\pm 0.64\,\mathrm{{}^{a}}\) & \(2.4\pm 0.03\,\mathrm{{}^{d}}\) & \(14.7\pm 0.28\,\mathrm{{}^{a}}\) & \(133.3\pm 1.7\,\mathrm{{}^{a}}\) & \(8.4\pm 0.53\,\mathrm{{}^{b}}\) \\ RS1 _Retention/\(\upgamma\)s_ & \(\boldsymbol{225.00}\,\mathrm{{}^{c}}\) & \(\boldsymbol{594.63}\,\mathrm{{}^{d}}\) & \(\boldsymbol{287.50}\,\mathrm{{}^{d}}\) & \(\boldsymbol{312.9}\,\mathrm{{}^{c}}\) & \(66.4\pm 0.4\,\mathrm{{}^{d}}\) & \(\boldsymbol{54.76}\,\mathrm{{}^{d}}\) \\ RS2 juice & \(14.3\pm 0.21\,\mathrm{{}^{c}}\) & \(61.7\pm 0.46\,\mathrm{{}^{d}}\) & \(1.06\pm 0.03\,\mathrm{{}^{b}}\) & \(22.2\pm 0.60\,\mathrm{{}^{c}}\) & \(17.8\pm 0.17\,\mathrm{{}^{a}}\) & \(7.4\pm 0.2\,\mathrm{{}^{b}}\) \\ RS2 powder & \(28.3\pm 0.42\,\mathrm{{}^{d}}\) & \(98.9\pm 4.5\,\mathrm{{}^{e}}\) & \(2.8\pm 0.04\,\mathrm{{}^{e}}\) & \(18.1\pm 0.98\,\mathrm{{}^{b}}\) & \(162.6\pm 0.66\,\mathrm{{}^{e}}\) & \(14.47\pm 0.17\,\mathrm{{}^{e}}\) \\ RS2 _Retention/\(\upgamma\)s_ & \(\boldsymbol{197.90}\,\mathrm{{}^{c}}\) & \(\boldsymbol{160.45}\,\mathrm{{}^{c}}\) & \(\boldsymbol{254.55}\,\mathrm{{}^{c}}\) & \(\boldsymbol{8.53}\,\mathrm{{}^{c}}\) & \(\boldsymbol{91.01}\,\mathrm{{}^{c}}\) & \(\boldsymbol{198.65}\,\mathrm{{}^{c}}\) \\ RS3 juice & \(55.8\pm 0.32\,\mathrm{{}^{i}}\) & \(56.4\pm 0.75\,\mathrm{{}^{i}}\) & \(1.25\pm 0.04\,\mathrm{{}^{c}}\) & \(67.9\pm 2.4\,\mathrm{{}^{i}}\) & \(28.2\pm 0.29\,\mathrm{{}^{i}}\) & \(18.5\pm 0.82\,\mathrm{{}^{d}}\) \\ RS3 powder & \(51.7\pm 0.38\,\mathrm{{}^{h}}\) & \(180.5\pm 3.6\,\mathrm{{}^{i}}\) & \(3  
D-limonene was discovered with the highest concentration (11,128 to 672,178 ug/L), accounting for 70-96% of the total terpene concentration.