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SEMI-QUANTITATIVE ASH ANALYSIS

Written by Rahul Verma | Updated: February 13, 2026

SEMI-QUANTITATIVE ASH ANALYSIS

Written by Rahul Verma |  Updated: February 13, 2026
Bitumen sample being tested for penetration and viscosity in materials testing laboratory
Asphalt and bitumen chemical property testing per ASTM D36 and D92 at Infinita Lab

SEMI-QUANTITATIVE ASH ANALYSIS

Semi-quantitative ash analysis is a technique used in process control, quality control, and research and development for measuring the levels of metals present in raw uncured, and cured rubber compounds. The metals that are commonly measured include lead, zinc, copper, and manganese. This technique involves using flame atomic absorption methods, which are in accordance with ASTM standards, to measure the level of metals after adjusting the sample mass and dilution.

The two standard test methods used for semi-quantitative ash analysis are ASTM D4004 and ASTM D4075. ASTM D4004 is used for the determination of metal content by flame atomic absorption analysis, while ASTM D4075 is used for rubber compounding materials flame atomic absorption analysis determination of metals. Both methods are used for measuring the levels of metal present in rubber compounds and provide valuable information to assist in the process control, quality control, and research and development of rubber compounds.

ABOUT AUTHOR

Rahul Verma

Rahul Verma is a dedicated Materials Scientist and Testing Associate with strong expertise in materials characterization, thermal spray coatings, and advanced manufacturing technologies. With a solid foundation in Materials Science & Engineering and hands-on research in additive manufacturing, he specializes in bridging material behavior insights with practical engineering solutions. Currently serving as a Materials Testing Associate at Infinita Lab Inc. (USA), Rahul ensures precise material testing, quality assurance, and customer-focused solutions that help clients overcome complex materials challenges.

His role blends technical rigor with operations and project management, driving efficiency, reliability, and client satisfaction. Rahul’s journey spans academic and industrial research at IIT Patna, where he has contributed to advancements in plasma spray techniques, AI/ML-driven material design, and additive manufacturing.

He has also co-founded GreeNext Materials Group, pioneering sustainable battery regeneration technologies that have a significant impact on both industrial and societal applications. With professional experience in operations leadership, R&D, and client engagement, Rahul brings a results-oriented and analytical approach to materials engineering. He continues to advance innovation in coatings, material performance, and testing methodologies—focusing on durability, sustainability, and real-world applications.

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