2016/07/21 11:19
阅读:362
分享:方案摘要:
产品配置单:
Agilent Cary630 傅里叶变换红外光谱仪
型号: Cary 630
产地: 马来西亚
品牌: 安捷伦
面议
参考报价
联系电话
方案详情:
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.
下载本篇解决方案:
更多
应用 QuEChERS 方法结合 Agilent 7000 系列三重四极杆气质联用仪测定甜菜中 的多农药残留
本文介绍了一种用于分析甜菜中 267 种农药的简便、高通量方法。该方法将 QuEChERS 样品前处理方法与 Agilent 7000 系列三重四极杆气质联用系统相结合,并通过基质匹配标样校准进行定量,以降低基质干扰引起的定量偏差。结果表明,该方法在 2–200 μg/kg 的基质加标浓度范围内具有良好的线性关系。绝大部分目标农药化合物的定量限 (LOQ) 低至2 μg/kg,灵敏度高。加标回收率测试表明,在 2、5、10、100 和 200 μg/kg 的加标浓度下,大部分农药化合物的回收率在 80%–120% 的范围内 (n = 5) ,且相对标准偏差 (RSD)低于 10%。该方法适用于对甜菜中的多种农药残留进行常规分析。
食品/农产品
2024/05/13
使用 Agilent BioTek Synergy Neo2 Hybrid 多功能微孔板检测仪测定脂质纳米颗粒表观 pKa
脂质纳米颗粒 (LNPs) 已被用作各种有效载荷的递送系统。本应用简报展示了 Agilent BioTek Synergy Neo2 Hybrid 多功能微孔板检测仪用于测定 mRNA LNPs 表观 pKa 的实用性。
制药/生物制药
2024/05/13
使用 ICP-OES 结合自动稀释测定锂盐中的多种元素
使用 Agilent 5800 VDV ICP-OES 和 Agilent ADS 2 自动稀释器自动分析锂离子电池前驱体化学品
能源/新能源
2024/05/13
使用配备高级稀释系统的 ICP-MS 对 高基质样品进行高效分析
在用 Agilent 7850 ICP-MS 分析前,使用 Agilent ADS 2 对沉积物和土壤进行自动稀释
环保
2024/05/13