安捷伦红外Agilent 5500用于测定酚类抗氧化剂，符合行业标准-。适用测定酚类抗氧化剂 DBPC 和 DBP 的含量项目。

The phenolic antioxidants 2,6-ditertiary-butyl paracresol (DBPC) (also known as butylated hydroxytoluene (BHT)) and 2,6-ditertiary-butyl phenol (DBP) are the two most common oxidation inhibitors added to the electrical insulating (transformer) oil and mineral oil based lubricants. The typical recommended value of DBPC and DBP in fresh electrical insulating oil is approximately 0.3% by weight. These inhibitors prevent electrical insulating oil from oxidative degradation, and prolong the life of the oil. It is essential to maintain the optimum concentration level of inhibitors to ensure the proper functioning of mineral oil used in transformer units as an insulating or cooling agent. The depletion rate of the inhibitors in the oil is dependent on various factors such as the amount of oxygen available, soluble contaminants, catalytic agents, and temperature. Therefore, regular testing of the inhibitors in electrical insulating oil is necessary to ensure its reliable operation in high value assets such as transformer units. ASTM 2668 and IEC 60666 are the standard test methods, using infrared spectroscopy (IR) technology to monitor the concentrations of DBPC and DBP in electrical insulating oil. These test methods are used to determine if the new electrical insulating oil meets the specification for oxidation inhibitor initial concentration levels. They also monitor the concentration of inhibitors in the used oil. If the inhibitors have been depleted to a critical level, additional inhibitor can be added. Therefore, the standard test methods are essential for manufacturing control, specification acceptance, and to periodically monitor the level of inhibitors in used oils.

Agilent 5500 系列 FTIR 光谱仪的设计目的只有一个，那就是快速可靠、持续不断地提供高质量的分析结果。该仪器将高性能光学系统、创新的采样接口和直观的软件界面完美结合，可为液体和固体样品分析提供准确结果，分析速度和操作简便性前所未有。

产品特性：

●  主要应用领域：石油化工

●  5500 Dialpath：能为透射光谱提供更长光程的测量能力，并且同 ATR 一样易于使用。

●  5500t：使用简便：将一滴液体滴于 5500t 分析仪的表面，然后旋转第二窗口至夹持样品位置，就可快速分析样品。

●  5500a：根据应用情况，可以采用 1 次、3 次或者 5 次反射的钻石 ATR 接口。单反射钻石 ATR 接口可用来鉴定固体和液体样品。多反射硒化锌 (ZnSe) ATR 接口可用来分析液体。

●  直观 — 多国语言的方法驱动软件引导用户执行每一步操作，而不同颜色标记的警报信息使用户轻松看出样品是否符合规范要求。MicroLab Quant 提供了简单的引导式定量分析方法开发包。

●  合规 — GLP/GMP 软件可升级，通过新增制药软件包而符合 21 CFR 11 的法规要求