Which lot does this report cover? A certificate-of-analysis case for analytical chemistry COA Reading Room, version 1.0, 12 November 2026 License Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/ This license applies to the original teaching text, fictional case records, worksheet and worked solution. Linked third-party publications retain their own terms. Suggested attribution “Which lot does this report cover?” by COA Reading Room, version 1.0, CC BY 4.0. Keep a link to the original resource when available, link to the license and indicate any changes.