Search the LME Home Physical services Brands Samplers and assayers Brands Samplers and assayers QUICK ACCESS Approved brands Chemical composition Listing process LME Listed Samplers and Assayers (LSAs) are independent organisations skilled in the chemical analysis of metals. From an LME perspective the approved organisations play an important role before and after brands are listed. Before LSAs are required to sample and evaluate the chemical quality of metals, which are subject to assessment, before a brand is approved. Evaluation must comply with the quality requirements outlined in contract specifications. After LSAs will issue certificates of analysis basis agreed sampling procedures for metals to be placed on LME warrant where original producer documentation may not be available. LME Listed Samplers and Assayers (PDF) Contact us For more information, please get in touch. Contact us STAY UP TO DATE Register with LME.com Receive full access to all our price data and gain access to our monthly LME newsletter, packed with market tips and insights from our on-staff specialists. Register now Metals Trading Clearing Market data Physical services About About the LME Committees Governance Corporate Business continuity FAQs Regulation LME Rulebook (Download) LME Clear Rulebook (Download) Guide to market structure (Download) Market regulation Benchmark regulation Pre-trade transparency Brexit Rules Arbitration Responsibility Responsible sourcing Sustainability Conduct Diversity and inclusion Charity Corporate disclosure CONTACT US London +44 (0)207113 8888 10 Finsbury Square London EC2A 1AJ Singapore +65 6535 5035 9 Battery Road #07-02 MYP Centre Raffles Place Singapore 049910 Register Log in Legal Privacy statement Cookie policy Modern slavery statement Website T&C's Email disclaimer Cyber security awareness © 2021 The London Metal Exchange - an HKEX Company. All rights reserved.