ASTM D4628
Standard Test Method for Analysis of Barium, Calcium, Magnesium, and Zinc in Unused Lubricating Oils by Atomic Absorption Spectrometry
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About This Item
ASTM D4628 is the standard test method for analyzing barium, calcium, magnesium, and zinc in unused lubricating oils by atomic absorption spectrometry. It is used to help measure these metallic elements in fresh oil formulations with a consistent laboratory approach. This matters for quality control, product verification, and technical evaluation when the elemental composition of a lubricating oil needs to be checked against expected formulation targets or procurement requirements.
Overview of ASTM D4628
The purpose of ASTM D4628 is to provide a recognized test method for determining specific metal content in unused lubricating oils using atomic absorption spectrometry. The standard focuses on barium, calcium, magnesium, and zinc, which are commonly associated with additive packages in lubricating oil formulations. As a technical document, it supports repeatable laboratory analysis and helps users compare results in a consistent way. ASTM D4628 is therefore useful where elemental composition is part of product confirmation or quality assessment.
Common use cases of ASTM D4628
ASTM D4628 is commonly used in laboratories that evaluate unused lubricating oils during formulation review, batch release, or incoming material inspection. It may be applied when a manufacturer, supplier, or buyer needs to confirm the presence or relative level of selected metals in an oil sample. The method is also relevant in workflows that rely on atomic absorption spectrometry equipment and require standardized elemental analysis for lubricating oil products.
Benefits of using ASTM D4628
Using ASTM D4628 helps improve consistency in elemental testing and supports clearer communication between laboratories, suppliers, and customers. Because it is a recognized ASTM standard, it can aid compliance efforts and reduce ambiguity when specifying analytical requirements for unused lubricating oils. It also supports quality control by providing a structured method for checking barium, calcium, magnesium, and zinc levels, which may help reduce evaluation risk and improve product confidence.
- Atomic absorption spectrometry-based analysis
- Targets barium, calcium, magnesium, and zinc
- Applies to unused lubricating oils
- Supports quality control and product verification
- Useful for standardized laboratory reporting
- Publication Date: 2023-06-07
- Publisher: ASTM
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