The document reading room

COA Checklist and Lot-Matching Practice

Use the tool in your browser. The page processes your entries locally and does not save them.

Certificate reading checklist

Compare the lot on the container label with the lot on the certificate. Mark the report fields you find and save a text copy of your review.

Compare lot identifiers

Enter up to 180 characters per lot. The comparison ignores spaces at the start and end. Case, internal spacing, prefixes and leading zeros matter.

Lot on container label Lot on certificate

Both lot identifiers are missing.

Report reference (optional)

Label or container ID (optional) Laboratory sample ID (optional)

Fields to locate Material name or catalog identifier Lot or batch identifier Test or report date Tests performed and analytical methods Reported results, units and stated limits Issuing lab or organization and report reference

0 of 6 fields marked as located.

Review notes (optional) Open question or follow-up (optional)

Practice with the fictional reports

Loading a case replaces the current review. Read the two reports and labels.

This review records lot text and document fields. Verifying a certificate and linking it to a received container require supporting records.

Read the reports and compare the labels

Fictional teaching reports. All issuers, identifiers, results and criteria below are simulated.

Certificate of analysis · TCOA-024

Report TCOA-024 header and sample record
Field	Fictional entry
Report and authorization	TCOA-024 / Rev 01 / page 1 of 1. Issued by Training Lab 04, authorized by teaching reviewer TR-04.
Material	Linear hexapeptide GAGKLV with free termini. Catalog EDU-HX06. Nominal 5.0 mg peptide equivalent per vial.
Tested sample	One sealed vial submitted by Classroom Supplier 02. Lab accession EDULAB-0251 is mapped to supplier lot EDU-L-0042. Individual vial ID is unreported.
Dates	Received 2026-08-10, tested 2026-08-12, issued 2026-08-13.
Supporting records	Referenced LC–MS spectrum TCOA-024-M, integration TCOA-024-H, and assay calculation TCOA-024-A. These attachments are outside the exercise.

TCOA-024 test results and stated acceptance criteria
Analyte or attribute	Method and basis	Unit	Result	Acceptance criterion
GAGKLV mass match	LC–MS M-07 Rev 02, deconvoluted neutral monoisotopic mass	Da	543.339	543.338 ± 0.010 Da
Main chromatographic peak	RP-HPLC/UV H-04 Rev 03 at 214 nm, 984 of 1,000 integrated signal-area units	area %	98.4	≥97.0 area %
GAGKLV amount in the tested vial	Calibrated HPLC/UV assay A-02 Rev 01, assigned-content reference	mg peptide equivalent per vial	4.70	4.50–5.50 mg per vial
Endotoxin	Method unreported	Unreported	Not reported	Unreported

The mass differs from the stated target by +0.001 Da. The area percentage uses the integrated UV signal as its denominator. The reported amount comes from a separate calibrated assay. Ask the issuer about the scope of any unreported test.

Second report · TCOA-027

Training Lab 04 issued TCOA-027 / Rev 02 / page 1 of 1 on 2026-08-20 after testing on 2026-08-19. It lists material EDU-HX06 and lab accession EDULAB-0257. The supplier lot and the intake record that would link it to the accession are unreported.

TCOA-027 result for the submitted specimen
Analyte or attribute	Method and basis	Unit	Result	Acceptance criterion
GAGKLV mass match	LC–MS M-07 Rev 02, deconvoluted neutral monoisotopic mass	Da	543.340	543.338 ± 0.010 Da

Three EDU-HX06 labels to compare
Vial label	Label lot	Report / accession	Reported lot	Document finding
A · BOX2-05	EDU-L-0042	TCOA-024 Rev 01 / EDULAB-0251	EDU-L-0042	Exact lot match. The individual vial link remains open.
B · BOX2-06	EDU-L-0044	TCOA-027 Rev 02 / EDULAB-0257	Unreported	Missing link. Ask for the accession-to-lot record.
C · BOX2-07	EDU-L-0043	TCOA-024 Rev 01 / EDULAB-0251	EDU-L-0042	Lot conflict. Request the correct report or a documented correction.

Practice the three comparisons and export your review.