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Analytical instrument notes for controlled work

Read practical notes on method evidence, calibration planning, inspection thresholds, and laboratory instrument lifecycle decisions.

Technical Note

I Rejected a Batch That Passed Every Test. Here's Why.

2026-09-02 Marcus Feld

A quality manager at a pharma contract manufacturer explains why he rejected a supplier's batch that passed every test—and how a Shimadzu UV-1800 spectrophotometer, Shimadzu HPLC system, Fluke 85 multimeter, thermocouple thermometer, and Mettler Toledo pH meter calibration exposed the real problem.

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