Spectrophotometer with diode array detector (DAD)

多不饱和脂肪酸等不稳定成分的氧化，不仅会影响食物的营养价值，还会影响食物的风味和感官品质。此外，食物中有益的抗氧化剂是由某些维生素、少量生物活性物质如酚类/多酚类和类胡萝卜素等产生的。此外，这些生物活性物质在促进健康和降低疾病风险方面的作用通常在体外和体内系统中进行评估：所涉及的效果/参数的监测和评估通常需要分析确定感兴趣的成分。在几乎所有这类研究中，紫外可见范围内的分光光度测定是必要的。虽然大多数紫外可见仪器通过在整个所需波长范围内逐渐扫描光来跟踪事件的过程，但二极管阵列检测（DAD）将同时照射不同波长的光通过样品，因此提供了好处，特别是对于非常敏感的材料。该设备将用于日常研究，包括正在进行的和计划中的营养保健和功能食品研究的不同领域，其结果将对基础科学和应用领域的进步具有重要意义。

Changes in food quality arising from oxidation of their labile components such as polyunsaturated fatty acids not only affect their nutritive value, but also affect their flavour and sensory qualities. In addition, beneficial antioxidants present in foods are rendered by certain vitamins, minor bioactives such as phenolics/polyphenolics and carotenoids, among others. Furthermore, the effects of these bioactives in health promotion and disease risk reduction are routinely evaluated in in-vitro and in-vivo systems: The monitoring and evaluation of effects/parameters involved often requires analytical determination of components of interest. In almost all of this research, spectrophotometric determinations in the UV-visible range are necessary. While most UV-visible instruments follow the course of events by scanning light gradually through the entire desired wavelength range, diode array detection (DAD) would simultaneously shine light of different wavelength through the sample and hence provides benefits, especially for very sensitive materials. This equipment will be used for daily research, both on-going and planned in different areas of nutraceutical and functional food research, the outcome of which would be of significance for progress of fundamental science and in the applied areas.