Historical
ASTM D7419-18 Red
Standard Test Method for Determination of Total Aromatics and Total Saturates in Lube Basestocks by High Performance Liquid Chromatography (HPLC) with Refractive Index Detection (Standard + Redline PDF Bundle)
1.1Â This test method covers the determination of total aromatics and total saturats in additive-free lube basestocks using high performance liquid chromatography (HPLC) with refractive index (RI) detection. This test method is applicable to samples containing total saturates in the concentration range of 74.9 % to 100.0 % by mass and aromatics in the concentration range of 0.0 % to 25.1 % by mass. The precision is expressed in terms of the total saturates.
1.1.1Â Polar comounds, if present, are combined with the total aromatics. Precision was determined for basestocks with polars content <1.0 % by mass.