Annual Product Review (APR / PQR)
An annual product review (APR / PQR) checks a year of quality data for each product. Learn what to include, how to trend it and how to act on the results.
OOE (Out of Expectation) in Pharma QC?
OOE means an in-spec result that looks unusual. See how it differs from OOT and OOS, with an HPLC peak example and a simple review process.
HPLC Causes of False OOT Results and How to Fix Them
Which lab errors give HPLC false OOT results? A checklist of records, standards, column, mobile phase and integration checks, with fixes.
Alert Limit vs Action Limit in OOT Trending
Alert limits give an early data check; action limits start a formal investigation. Learn how to set both for OOT trending and write them into the SOP.
How to Investigate an OOT Result in Stability Testing
Learn the decision flow for an OOT investigation in stability studies, from the first flag to a documented conclusion and CAPA decision.
How to Identify OOT in Stability Studies: Statistical Methods
Learn how to find OOT in stability studies with regression, tolerance interval and slope methods, and follow a worked assay example.
OOT vs OOS in Pharma: Differences and Investigation
OOS breaks a limit and blocks release. OOT breaks a pattern and needs assessment. Learn the differences, investigation steps and release decisions.
Out of trend (OOT) results in Pharmaceutical Quality control
OOT results pass specification but break the usual pattern. Learn how to detect them, how they differ from OOS, and how to investigate them.
Multimill Troubleshooting: Common Problems & Fixes
Most of the causes of multimill malfunctions such as oversized granules, excessive fines, screening problems, or motor overloads are related to blade dullness, incorrectly sized screens, or improper feed rates. In this article, you will find 8 failure modes with their potential causes and solutions for your pharmaceutical granulation process.
Colloidal Mill: Common Problems, Causes, and Troubleshooting Tips
Even a well-maintained colloidal mill experiences recurring issues that lead to malfunction eventually, and usually, there are only several common causes for that: the gap drift, rotor/stator wear, improper feed rate, or a faulty mechanical seal. Moreover, preventing the issues from arising is significantly simpler and less resource-consuming than addressing them after they occur. For … Read more
Common Problems and Troubleshooting for Disintegration Test Apparatus
Have you ever asked yourself why a tablet, which has passed all the other quality control tests, fails the QC bench? A disintegration test apparatus is used to determine whether a tablet or a capsule disintegrates within a specified time under defined conditions. The test is performed by vertically reciprocating the unit in a liquid maintained at human body temperature. This article describes the working principle of the disintegration test apparatus, its components, the procedure for the disintegration test, calibration, and the disintegration limits set by the manufacturers for different dosage forms. This information will help QC and manufacturing personnel to perform the disintegration test properly and release the batches of the pharmaceutical products.
Common Audit Observations and FDA 483 Findings for Water Systems
Learn what FDA investigators actually flag most often when auditing pharmaceutical water systems — sampling gaps, sanitization failures, monitoring lapses, validation shortfalls, CAPA deficiencies, and broader GMP compliance issues.
0.1M Perchloric Acid Preparation and Standardization Procedure (IP Method)
Know the step-by-step procedure used to prepare and standardize 0.1M perchloric acid solution as per IP guidelines. Incorporates reagents, equipment, calculation, detection of endpoint, storage of reagents, and standardization with potassium hydrogen phthalate (KHP).
0.004 M Benzethonium Chloride Solution Preparation and Standardization Procedure
Preparation and standardization of 0.004 M benzethonium chloride solution with potentiometric titration with 0.1 M perchloric acid. It deals with preparation of reagents, calculation of standardizations, equivalence factor and recommendation on storage for pharmaceutical laboratory applications.
How to Prepare and Standardize 0.05 M Silver Nitrate (SOP)
Here is the exact process for making and standardizing 0.05 M silver nitrate. Includes the chemicals, the titration procedure and the formula to calculate and storage condition
Preparation and Standardization of 0.025 M Sulphuric Acid Solution
Know how to prepare 0.025 M sulphuric acid solution using anhydrous sodium carbonate, methyl red indicator, calculations and titration procedure.