计算溶液所需的质量、体积或浓度。
,适用于对基线干扰要求严格的色谱和分析工作流程。
室温。常规运输 。请查阅批次 COA 获取详细规格。
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在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。
所列的产品的总酸值(TAN)在操作过程中用以检测和控制是有、润滑剂、生物柴油或混合生物柴油中的酸性成分。 总酸值(TAN) 根据材料(如甲苯或异丙醇)中的样本溶解度,水中酸的离解常数或测试样本性质的不同,测试该参数的操作(拟定使用多种ASTM方法)会有所变化。因此,用于润滑剂的方法可能不同于用于生物柴油的方法。在未使用和使用过的油中。被认为可能具有酸性特征的成分包括有机酸、无机酸、酯、酚类化合物、内酯、树脂、重金属盐、多元酸酸式盐和添加剂(如:抗化剂和清洁剂)。 该检测方法用于显示再不考虑油的颜色或其他属性的氧化条件下使用油时出现的相对变化。该方法也用作润滑剂配方中的质量控制向导或用作润滑剂讲解的方法。该方法的目的不是测量绝对酸性,该绝对酸性可用作预测工作条件下油的性能。目前轴承腐蚀和酸值并不存在确切的关系。执行测试的方法包括溶解滴定溶剂中的样本和电位滴定法进行酒精性氢氧化钾的酸/碱滴定。所有都在合成碱油基质中
The products listed for Total Acid Number (TAN) are used in procedures to test and control the acidic constituents in petroleum, lubricants, biodiesel or blends of biodiesel. Total Acid Number (TAN) The procedures for the measurement of this parameter (laid down in various ASTM methods) vary depending on sample solubility in materials such as Toluene or Propan-2-ol, the dissociation constants of the acids in water, or the nature of the test sample. Therefore, the methodology used for lubricants maybe be different from the methodology used for biodiesel. In new and used oils the constituents that may be considered to have acidic characteristics include organic acids, inorganic acids, esters, phenolic compounds, lactones, resins, salts of heavy metals, acid salts of polybasic acids, and additives such as inhibitors and detergents. The test method is used to indicate relative changes that occur in oil during use under oxidising conditions regardless of the colour or other properties of the oil. The method is also used as a guide in the quality control of lubricating oil formulations or as a measure of lubricant degradation. It is not intended to measure an absolute acidic property that can be used to predict performance of oil under working conditions. There is no known relationship between corrosion of bearings and acid number. The methodology of performing the test involves dissolving the sample in a titration solvent and titrating potentiometrically as an acid/base titration with alcoholic potassium hydroxide.All in a Synthetic Base Oil Matrix