Implants - Final Release Testing

Every prosthesis, surgical mesh, scaffold or breast implant must be confirmed to meet safety, efficacy and quality standards such as ISO 11607. 

Check density, moisture and dose accuracy as well as biocompatibility and bioburden. Prevent device defects and ensure finished products are stable and safe for use. Sartorius solutions support final release testing to demonstrate compliance with regulatory guidelines. 

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Medical Devices - General Process Steps

Final Release Testing Solutions

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Final Release Testing Applications for Drug Delivery Systems

With the following applications, we are committed to providing you the products you need to validate your devices are safe for the patient and to guarantee the efficiency of the active ingredients:

Check Smallest Quantities

Extended wear, delivery of drugs, biocompatibility or corrosion resistance - coatings on drug delivery systems provide numerous benefits. To fulfill their function reliably, coatings, protection layers and foils must be picked up uniformly. 

Weighing by difference solutions from Sartorius are your best fit to verify that coating systems have applied the exact amount of medical grade polymer or API to an implantable device, such as a DES (Drug Eluting Stent). For reliable, reproducible and straightforward weighing workflows:

  • Highest precision for smallest quantities, protected against drafts and electrostatic charges
  • Sample holders accommodate differently shaped products
  • Full data traceability and integrity
  • Compliant to 21 CFR part 11 and EU Annex 11

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Featured Products

Your Solution to Check Coatings, Protection Layers & Foils

Cubis® II Microbalances offer complete digital workflow management while supporting all requirements to achieve 21 CFR part 11 and EU GMP Annex 11 compliance. A stand-alone solution for advanced user management, audit trail, electronic signature and safe data transfer prevents data manipulation. Benefit from easy set-up, simple maintenance and weigh differently shaped products conveniently by choosing the best fitting draft-shield and customized holders. The stainless steel draft shield F protects against drafts and electrostatic charges.

Let the Backweighing QApp guide you through weighing workflows for simple, differential weighing with alphanumeric lot tracking.

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Supporting Products

Cubis® II Stent Holder

Sample Holders

Choose from 12 sample holders to find one that best suits your application.

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Secura® Lab Balance

Secura® Laboratory Balances

Secura® features built-in protection systems for reliability and regulatory compliance – the safe and secure way.

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Check Correct Assembly

Sartorius Checkweighing Solutions ensure that complex, but small implants have been assembled completely in QC and that no part is missing - before and after packaging. The readability of balances will be determined by the weight of the smallest component in the finished product assembly.  The fully-modular device can be customized to your specific needs.  

  • High resolution
  • Accommodates differently shaped products
  • Full data traceability and integrity
  • Document results in compliance with FDA 21 CFR Part 11 & EU GMP Annex 11, USP Chapter 41

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Featured Products

Checkweigh for Error-Proof Packaging

The Cubis® II Analytical and Cubis® II Precision Balances offer completely digital workflow management while supporting requirements for 21 CFR part 11 and EU Annex 11 compliance. A stand-alone solution for advanced user management, audit trail, electronic signature and safe data transfer prevent data manipulation.

Benefit from easy setup and simple maintenance and weigh products with conveniently customized sample holders. On-board QApps guide you through weighing processes, increase measurement accuracy, precision and process safety. The Average Weight control QApp checks if a sample weight is within a specified tolerance.

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Average Weight Control QApp QApp003

A check for the average weight of packaged goods according to 76/211/EEC and for filling processes with documentation capabilities in compliance with...

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Measure Liquids, Pastes and Solids – Precisely, Accurately and With Full Regulatory Compliance

Coatings, 3D inks, plastics, metals - guaranteeing the specified density of raw materials is crucial for stability and safety of drug delivery systems. Deviations due to impurities or poor quality may have profound effects on the final product’s performance. 

Our solutions are tailored to the needs of density applications. Durable, high-performance balances and pycnometers, integrate with user management systems to generate traceable results, for precise and reproducible density calculation.

  • Check density of solids, liquids and pastes with one balance, even highly viscous or solid materials with densities in excess of 3 g/cm3
  • Increase measurement precision and process safety
  • Document results compliant to 21 CFR Part 11 & EU GMP Annex 11, USP Chapter 41

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Confirm Purity of Materials

Cubis® II Analytical balances are designed for high-performance weighing and offer completely digital workflow management following the US FDA data integrity principles (ALCOA). On-board QApps contribute to correct usage by guiding through weighing processes, increasing measurement accuracy, precision and process safety. 

The Pharma Software Application Package supports compliance with 21 CFR Part 11 and  EU GMP Annex 11, USP Chapter 41 and includes features like user management, digital signatures, audit trail and USP minimum weigh.

Simply combine the Density Kit YDK03MS and you can determine additional key physical property characteristics like specific gravity or density on solids, liquids and even pastes. 

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Supporting Products

Cubis® II Analytical Balance

Density Determination Kit for Lab Balances

Density determination kit for Cubis® models with 0.1 mg readability and draft shield.

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Determine Moisture Contents Within Minutes

Drug delivery system packaging must provide a secure barrier to preserve the product until use. To avoid microbial contamination, friction or oxidation, the influence of moisture on packaging material like nylon, plastic, paper or cardboard has to be tested. It is mandatory to capture even the smallest deviations in moisture for assuring the appearance and functionality of the final product.

Sartorius offers robust and reliable solutions, so you accurately detect and document moisture contents quickly and easily within your routine applications: 

  • Compliant to ASTM Standard D6980, ISO 868-7 Annex E
  • Measure minimum moisture content down to 0.005 %
  • Process up to 4 samples simultaneously
  • Achieve highest precision, even for very dry samples
  • Comply with EN 868 for sterile barrier systems

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Featured Products

Economic and Reliable Moisture Content Analysis 

Mark 3 HP Moisture Analyzer is the genuine alternative to Karl-Fisher titration because it is easy to use and operates without the need for harmful chemicals.   A high-resolution weighing system and special design makes Mark3 HP the perfect solution for precisely analyzing the moisture content of even very dry samples.

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Supporting Products


The MA160 offers high flexibility, making it ideal for use in the widest range of sectors, such as laboratories, incoming goods and production departm...

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MA100 Moisture Analyzer


The MA100 infrared moisture analyzer combines the highest possible accuracy of an analytical balance and practical application software into one unit.

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Reliable Microbial Enumeration

Finished products must be free from microbial contamination to ensure consistent, reliable product quality and safety as per ISO 11737-1. Any undetected presence of microorganisms may cause unnecessary delays or product recalls. Prior to final sterilization and packaging, bioburden testing is carried out to determine the population of viable microorganisms on or in the product. Post sterilization, it can demonstrate the integrity of the sterilization process and sterility assurance during shelf life.

Our membrane filtration solutions for standard microbial enumeration protocols per USP <61> facilitate an efficient, accurate detection of potentially pathogenic or spoilage microorganisms:

  • Save time with ready-to-use sterile filtration devices
  • Minimize the risk of secondary contamination and false positives
  • Touch-free membrane transfer

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Featured Products

Simplify Your Microbial Limits Testing Workflows

Single and multi-branch Microsart® Manifolds are easy to clean and rinse, provide reliable and reproducible results and are adaptable to various filter device formats to suit your individual needs.

To reduce the risk of secondary contamination, the Microsart® @filter combined with the Microsart® @media system with its integrated adhesive ring in the lid. This effortlessly affixes the membrane and positions it correctly on the agar plate for a touch-free membrane transfer. No liquid remains after filtration.

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Sterility Testing

Take advantage of innovative solutions in design and ergonomics and enhance performance of sterility testing by membrane filtration.

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Supporting Products

Microsart® Manifold

Single and multi-branch filtration systems adapt to your needs by offering high flexibility, best ergonomics and quality.

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Save Time and Improve Reproducibility

The biological risk of an implantable device is directly linked to its surface properties and the complexity of its constitutive components. Assessing the composition of materials and their ability to release extractables and leachables is standard in evaluating biocompatibility. FTIR, MS, ICP-MS or GC require robust, reliable sample preparation and streamlined workflows to ensure clean, reproducible, interference-free results. 

Sartorius provides user-friendly sample prep tools for Chemical Characterization per ISO 10993-18. Time-saving solutions for preparing samples for content and purity analysis produces robust and reliable sample processing procedures.

  • Fast, simple and economical 
  • Fully automated preparation of standards
  • 21 CFR Part 11 & EU GMP Annex 11, USP Chapter 41 compliant records
  • Filtration solutions with low retention volumes and maximal recoveries
  • Minimum leachables or extractables

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Featured Products

Your Solutions for Analytical Testing

Ultrapure Lab Water Systems Arium® Mini Plus UV with Unique Bag Technology produce ASTM Type 1 ultrapure water for analytical buffer and sample preparations. Minimize chemical ion interference and take TOC levels down to a minimum to ensure consistent baselines and avoid background noise in chromatograms.

Simplify your buffer and sample preparation with the Cubis® MSA Dosing System with Q-App Software for automation and documentation of 100% comparable standards. Documentation of your test procedures is compliant to 21 CFR Part 11.

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Supporting Products

Arium® mini water purification system

Arium® Mini Plus UV Ultrapure Lab Water Systems

Consistent baselines and fewer ghost peaks with high-quality ultrapure type 1 water.

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Cubis® Balance with Q-App Software

Preparation of standards with defined concentration

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Tacta® and Picus® Pipettes with Low Retention Tips

Enjoy safe and reliable pipetting of even the smallest volumes.

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Claristep filter

Claristep® Filtration System and Minisart® Syringe Filters

Clarification by filtration to remove particles from samples decisively impacts the reliability of your results and extends service life of columns.

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Final Release Testing Resources

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Featured Resources

Measurement Inaccuracy of Rapid Moisture Analyzers as a Function of Sample Quantity

Measurement Inaccuracy of Rapid Moisture Analyzers

In the medical devices industry, moisture content must be extremely low prior to injection molding of any plastic component.

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Ultrapure Water for Trace Analysis

Ultrapure Water For Trace Analysis with ICP-MS

This analytical test series demonstrates how Arium Pro UV ultrapure water systems deliver the high purity level required for ICP-MS trace analysis.

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Instrument Service – Better Performance for Your Devices

Service life cycle management is a critical element when purchasing your equipment. Proper life cycle management starts with the installation of the equipment and basic user training, which is followed by routine preventative maintenance visits. These services will increase the longevity of the unit, while reducing downtime and limiting product lost.

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