ISO 11143:2008

Overview

ISO 11143:2008 - "Dentistry - Amalgam separators" is an ISO standard that specifies requirements and laboratory test methods for amalgam separators used with dental equipment in dental treatment centres. It defines how to assess separator efficiency (retention of amalgam particles), safety and electrical requirements, marking, and manufacturer instructions for installation, operation and maintenance. All tests in the standard are type tests performed in laboratory conditions.

Key topics and requirements

• Minimum efficiency: Separators must retain at least 95% (mass fraction) of a specified test sample; efficiency is determined under both empty and full conditions.
• Classification: Systems are classified by separation method:
  • Type 1: Centrifugal
  • Type 2: Sedimentation
  • Type 3: Filter
  • Type 4: Combination (any of 1–3)
• Test method principle: Effluent from the separator is collected, filtered through pre-weighed filters, dried and weighed to calculate mass retention (see Introduction and clauses 7–9).
• Warning and alarm systems:
  • Warning signal to indicate when the collecting container should be emptied (activated before maximum fillable volume).
  • Alarm when the collecting container reaches the maximum fillable volume; remains active until emptied or replaced.
  • Special provisions: Type 2 (sedimentation) can meet requirements by documented maintenance/recovery procedures.
• Safe removal and sealing: Removable collecting containers (including filters) must be removable and sealable without discharging contents to public sewage.
• Additional requirements: Tests for malfunction alarms (Types 1 and certain Type 4), maximum fillable volume, electrical safety, marking and user instructions.
• Supporting test detail: Annexes include preparation of test samples, grinding procedures, sedimentation/X‑ray methods and real-world particle size distribution data.

Practical applications and users

ISO 11143:2008 is used by:

• Manufacturers of dental amalgam separators to design, test and certify products.
• Test laboratories performing type tests and efficiency verification.
• Dental clinic managers and procurement teams selecting compliant equipment to control dental wastewater and meet environmental requirements.
• Regulators and waste management authorities establishing compliance expectations for dental waste handling.
• Service and maintenance personnel following marking, operation and maintenance instructions required by the standard.

Keywords: amalgam separators, ISO 11143:2008, dental amalgam waste, dental wastewater, efficiency test, dental equipment standard, amalgam separator requirements.

Related standards

Normative references in ISO 11143:2008 include:

• ISO 1942 (vocabulary), ISO 24234 (mercury/alloys), ISO 9687 (graphical symbols), ISO 3696 (water for lab use), ISO 3585 (borosilicate glass)
• IEC 60601‑1 and IEC 61010‑1 (electrical safety requirements)