Medical Laboratory Testing: Ash Content
Ash Content testing determines the percentage of inorganic residue remaining after a plastic, polymer, or composite specimen is completely burned in a high-temperature furnace. The test measures the filler content, additives, or impurities that do not burn off. For medical manufacturers, accurate ash content is important to verify material purity, confirm proper filler loading, and ensure consistent quality in tubing, films, bags, connectors, and molded components.
In medical polymers, the amount of ash (inorganic residue) can affect mechanical properties, processability, and biocompatibility. Too much or too little filler can change strength, flexibility, or long-term performance. Applus+ Reliable Analysis already maintains accredited ash content testing capabilities using muffle furnaces and precise weighing procedures, integrated with our broader polymer characterization and chemical analysis programs.
These measurements support material qualification under ISO 10993 and USP standards. Manufacturers use ash content data to confirm supplier specifications, monitor batch consistency, and document inorganic residue levels for regulatory submissions. Applus+ Reliable Analysis delivers accurate, reproducible results using equipment already operating daily under our ISO/IEC 17025 accreditation.
Common Ash Content Medical Testing Standards
ASTM D5630 Standard Test Method for Ash Content in Plastics
ASTM D5630 determines the ash content of plastics by igniting a weighed specimen in a muffle furnace at high temperature until all organic material is burned off, leaving only the inorganic residue. The standard provides procedures for different plastic types and filler levels. Medical manufacturers use this test to verify filler content, purity, and inorganic residue in polymers used for tubing, films, bags, connectors, and molded components, ensuring consistent material quality and compliance with specifications.
ISO 3451-1 Plastics General Methods
ISO 3451-1 specifies general methods for determining the ash content of plastics by combustion in a muffle furnace. The standard outlines sample preparation, ignition conditions, and calculation of the inorganic residue percentage. It is widely applied to medical-grade polymers and composites to confirm low inorganic impurities and proper filler levels in materials intended for catheters, packaging, and implantable or disposable devices, particularly for European MDR compliance.
USP <281> Residue on Ignition (Ash Content)
USP <281> measures the residue on ignition (ash content) of pharmaceutical and medical materials by igniting the specimen to constant weight and determining the remaining inorganic material. The chapter provides clear procedures and acceptance criteria for various substances. It is commonly used for medical plastics, packaging films, and components that contact drugs or sterile pathways to ensure low inorganic residues and compliance with pharmacopeial standards.
ASTM D2584 Ignition Loss of Cured Reinforced Resins (Ash Content)
ASTM D2584 determines the ignition loss (and thus ash/filler content) of cured reinforced resins by combustion in a muffle furnace. The standard is particularly suited for glass-fiber or other reinforced composites. Medical manufacturers apply it to structural composites and reinforced materials used in device frames, orthopedic supports, and specialized components to verify filler loading and material composition for consistent mechanical performance.
Your Partner for Expert Ash Content Testing
Applus+ Reliable Analysis stands ready to support your medical polymer and material ash content testing needs. Our ISO/IEC 17025 accredited laboratory already maintains the necessary muffle furnaces and analytical capabilities. This allows us to efficiently add these medical standards with only minor validation and training.
Whether you are qualifying new tubing and films, validating injection-molded components, or ensuring purity in medical-grade resins, our team provides accurate and reliable data backed by decades of materials testing expertise. We invite you to Contact us to discuss how our expanded medical testing capabilities can support your next project or regulatory submission.
Additional Applus+ Reliable Analysis’ Commercial Medical Testing Capabilities
Whether it be material EMC, environmental, fabrication, or durability testing, Applus+ Reliable Analysis has a full lab of test equipment. This permits us to provide short lead times on scheduling. Our team strives to give our customers more time and energy on product development rather than testing.
Below is a list of common medical testing types that Reliable Analysis offers. Don’t see what you are looking for? Contact us, and we will determine the best course of action.
