This study explored the effect of different drying methods (sun, shade, oven) on the total polyphenol content (TPC) using the Folin–Ciocalteu (FC) procedure, total flavonoid content (TFC) using the AlCl3 colorimetric method, volatile organic compounds using GC/MS and the antioxidant properties of the rose petals using the protocol of DPPH assy. The results demonstrated that the drying methods had a significant impact and the highest TPC (34.24 mg gallic acid equivalent (GAE)/ g fresh weight (FW)) and TFC (5.56 mg catechin equivalent (CE)/g FW) were obtained for the oven-dried sample. While, the fresh sample exhibited the lowest TPC (15.6 mg GAE/g FW) and TFC (3.83 mg CE/g FW), respectively. Similarly, the oven-dried sample showed the highest DPPH scavenging activity (60.30 %) and reducing power (absorbance 1.138) among all the samples. Fresh rose sample GC–MS analysis revealed that the there are two major compounds heptacosane 64.56 % and citronellyl propionate 28.35 %. Pentadecyl 2-phenylethyl ester oxalic acid was the second dominant compound in sun and oven-dried rose samples, 18.5 % and 14.79 % respectively.

本研究采用 Folin-Ciocalteu (FC) 程序探讨了不同干燥方法（日晒、阴凉、烤箱）对总多酚含量 (TPC) 的影响，采用 AlCl3 比色法探讨了总黄酮含量 (TFC) 的影响，采用 AlCl3 比色法探讨了对挥发性有机化合物的影响。使用 DPPH 分析方案进行 GC/MS 和玫瑰花瓣的抗氧化特性。结果表明，干燥方法具有显着影响，并且获得了最高的 TPC（34.24 毫克没食子酸当量（GAE）/克鲜重（FW））和 TFC（5.56 毫克儿茶素当量（CE）/克 FW）。烘干样品。而新鲜样品分别表现出最低的 TPC（15.6 mg GAE/g FW）和 TFC（3.83 mg CE/g FW）。同样，烘干的样品在所有样品中表现出最高的 DPPH 清除活性（60.30%）和还原能力（吸光度 1.138）。新鲜玫瑰样品GC-MS分析显示，有两种主要化合物：二十七烷（64.56%）和香茅基丙酸酯（28.35%）。十五烷基 2-苯乙酯草酸是日晒玫瑰和烘干玫瑰样品中的第二主要化合物，分别为 18.5% 和 14.79%。