Qualitative analysis of the spray dried apple powder (SDAP) was carried out which revealed slightly higher moisture content (2.91%) and water activity (0.217) as compared to the apple powder available in market (MP). Solubility, dispersibility and sinkability of SDAP was comparable to MP while significantly (p < 0.05) high wettability values were recorded for SDAP indicating its improved reconstitutional properties. Low cohesiveness, Carr's index while as high angle of repose was recorded for SDAP as compared to MP depicting its excellent flow characteristics. DSC thermograms showed high Tg, Ts, ΔH and low ΔC_p of SDAP revealing better stability and amorphous nature of SDAP. XRD diffractograms also depicted presence of single broad peak in SDAP further validating its amorphous structure. Particle size distribution showed that SDAP comprised of 62% large sized particles with overall average particle mean diameter (D_4,3) of 342.9 nm. Rheological studies showed that SDAP exhibited non-Newtonian behaviour. Storage modulus (G′) was found higher than loss modulus (G″) in SDAP as compared to MP. Sorption isotherm revealed that SDAP was stable when stored at relative humidity of less than 25%. Oswin and GAB models predicted the sorption behaviour of SDAP effectively as depicted by high R² values.

对喷雾干燥的苹果粉 (SDAP) 进行了定性分析，结果表明与市售的苹果粉 (MP) 相比，水分含量 (2.91%) 和水分活度 (0.217) 略高。SDAP 的溶解性、分散性和下沉性与 MP 相当，而 SDAP 的高润湿性值（p < 0.05）显着记录，表明其改进的重构性能。与 MP 相比，SDAP 记录了低内聚性、Carr 指数，同时记录了高休止角，描绘了其出色的流动特性。DSC 热分析图显示高 Tg、Ts、ΔH 和低 ΔC _pSDAP 揭示了更好的稳定性和 SDAP 的无定形性质。XRD 衍射图还描绘了 SDAP 中单个宽峰的存在，进一步验证了其无定形结构。粒度分布表明，SDAP 包含 62% 的大尺寸颗粒，总平均粒径 (D _4,3 ) 为 342.9 nm。流变学研究表明，SDAP 表现出非牛顿行为。与 MP 相比，SDAP 中的储能模量 (G') 高于损耗模量 (G”)。吸附等温线表明，SDAP 在相对湿度小于 25% 的条件下是稳定的。Oswin 和 GAB 模型有效地预测了 SDAP 的吸附行为，如高 R ²值所示。