Determination of the Acid Number According to ASTM D664 and the Base Number in Fresh Motor Oil

Refined petroleum products are evaluated using the acid number (AN) and base number (BN) which are vital in their quality control and validation. This Application Note describes how to carry out a potentiometric determination of the AN in compliance with ASTM D644 using a reduced solvent volume of 60 mL. It also describes how to determine the BN using a fully automated OMNIS system. A dSolvtrode was used for this indication.

样本

新的机油。

Analysis

4 – 7 g of the sample is accurately weighed into a sample beaker to which the device automatically adds 60 mL solvent. The stirred sample is then titrated with the corresponding titrant until the equivalence point is passed.

在滴定完成之后，首先用溶剂混合物冲洗电极和托管尖端，然后用IPA和无氧化二氧化碳水冲洗。通过将电极在蒸馏水中放置3至5分钟来进行膜再水化。在下次测量之前，电极应使用IPA冲洗外。

配置

解决方案

Parameters

Results

New motor oil sample.

这些信息已被源，从Metrohm AG提供的材料进行审核和调整。欧洲杯足球竞彩

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