Learn SOP for dissolution profile study selection criteria & procedure.
In pharmaceutical development and quality control, dissolution testing plays a crucial role in ensuring drug release and bioavailability. However, before conducting a full dissolution profile study, proper selection criteria must be followed.
This detailed SOP for dissolution profile study selection criteria provides clear guidelines for evaluating batches, setting parameters, and ensuring compliance before proceeding with detailed studies.
1. Objective of the SOP
The objective is to:
- Define selection criteria before dissolution profile study
- Ensure consistency in dissolution testing
- Evaluate product performance after changes
- Maintain compliance with regulatory requirements
2. Scope
This SOP applies to:
- Immediate release tablet dosage forms
- Products undergoing changes in:
- Process
- Equipment
- Composition
- Quality Control laboratory activities
3. Roles and Responsibilities
3.1 Responsible Personnel
- Technical Assistant / Executive: Perform dissolution testing
- Executive / Manager: Review and verify results
3.2 Accountability
- Head of Department: Ensure SOP compliance
4. Selection Criteria for Dissolution Study
Before performing a full dissolution profile:
- Conduct testing on first three batches after any change
- Analyze 12 units per batch
- Ensure consistency across batches
👉 This helps identify any variation early.
5. Dissolution Testing Parameters
Set the following standard parameters:
- Medium: 1000 ml of 0.0001 N HCl
- Time: 15 minutes
- Apparatus: USP Apparatus II (Paddle)
- Speed: 50 RPM
👉 Standardization ensures reproducibility.
6. Acceptance Criteria
- Dissolution result should be Not Less Than (NLT) 90%
👉 This indicates adequate drug release.
7. Step-by-Step Procedure
7.1 Batch Selection
- Select first three batches after changes
- Ensure proper identification and documentation
7.2 Sample Analysis
- Take 12 units per batch
- Perform dissolution testing under defined conditions
- Record:
- Absorbance (UV) or Area (HPLC)
- % drug release
7.3 Evaluation of Results
- Calculate average dissolution
- Compare with acceptance criteria
7.4 Decision Criteria
- If ≥ 90% dissolution achieved:
- No further profile study required
- If < 90% dissolution:
- Perform full dissolution profile study as per product method
👉 This ensures proper decision-making.
8. Documentation Requirements
Prepare report including:
- Product name and batch number
- Type of change
- Dissolution parameters
- Instrument details (HPLC/UV, balance)
- Standard and sample preparation
- Observed results and calculations
- Analyst and reviewer signatures
👉 Proper documentation ensures traceability.
9. Instruments Used
- Dissolution test apparatus
- HPLC or UV spectrophotometer
- Analytical balance
10. Safety Precautions
- Handle HCl carefully
- Wear PPE (gloves, goggles, lab coat)
- Avoid contamination of samples
- Follow lab safety guidelines
11. Best Practices
- Use calibrated instruments
- Maintain consistent testing conditions
- Record data immediately
- Validate analytical methods
- Ensure proper sample handling
12. Common Mistakes to Avoid
- Incorrect sample size
- Improper dissolution medium preparation
- Skipping batch evaluation
- Poor documentation
- Ignoring acceptance criteria
FAQs
1. What is dissolution testing?
It measures how quickly a drug releases from a dosage form.
2. Why is selection criteria important?
It ensures proper evaluation before full profile study.
3. How many batches are tested?
Three batches after changes.
4. How many units are analyzed?
12 units per batch.
5. What is USP Apparatus II?
A paddle-type dissolution testing apparatus.
6. What is the acceptance criteria?
Not less than 90% drug release.
7. What happens if results are below 90%?
A full dissolution profile study is required.
8. What medium is used?
0.0001 N HCl.
9. What is RPM in dissolution testing?
Revolutions per minute of paddle speed.
10. Why is documentation important?
For compliance and audit purposes.