University of Zagreb Faculty of Agriculture, Svetošimunska cesta 25, 10000 Zagreb, Croatia.
University of Zagreb Faculty of Agriculture, Svetošimunska cesta 25, 10000 Zagreb, Croatia.
Food Chem. 2017 Oct 1;232:286-294. doi: 10.1016/j.foodchem.2017.03.159. Epub 2017 Apr 1.
Samples of Satsuma mandarin (Citrus unshiu Marc.) nectar, honey sac content and honey were analyzed by FTIR-ATR spectroscopy and reference methods. The spectral analysis allowed detection of the major chemical constituents in C. unshiu nectar-to-honey transformation pathway thus providing information on the intensity and location of the compositional changes occurring during this process. The preliminary results showed that in average more than one-third of sugar-related nectar-to-honey conversion takes place directly in the honey sac; the average sugar content (w/w) was 17.93% (nectar), 47.03% (honey sac) and 79.63% (honey). FTIR-ATR results showed great spectral similarity of analyzed honey samples and small degree variations in both sugar and water content in nectar samples. The spectral data revealed distinctive differences in the chemical composition of individual honey sac contents with the most intensive and complex absorption envelope in the spectral region between 1175 and 950cm (glucose, fructose and sucrose absorption bands).
采用傅里叶变换衰减全反射（FTIR-ATR）光谱法和参考方法分析了温州蜜柑（Citrus unshiu Marc.）花蜜、蜜囊中蜂蜜和蜂蜜样本。光谱分析可检测到 C. unshiu 花蜜转化为蜂蜜的主要化学成分，从而提供有关该过程中组成变化的强度和位置的信息。初步结果表明，在平均水平上，超过三分之一的与糖有关的花蜜转化为蜂蜜直接在蜜囊中进行；平均糖含量（w/w）分别为 17.93%（花蜜）、47.03%（蜜囊）和 79.63%（蜂蜜）。FTIR-ATR 结果表明，分析的蜂蜜样本具有很大的光谱相似性，而花蜜样本中糖和水分含量的变化很小。光谱数据显示，各个蜜囊中蜂蜜的化学成分存在明显差异，在 1175 至 950cm 之间的光谱区域中具有最强烈和最复杂的吸收包络（葡萄糖、果糖和蔗糖吸收带）。
