SOP for Operation, Calibration, and Verification of Dissolution Test Apparatus

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STANDARD OPERATING PROCEDURE
Operation, Calibration, and Verification of Dissolution Test Apparatus

1.0 Purpose

To establish a harmonized and standardized procedure for operation, physical (mechanical) calibration, chemical calibration (Performance Verification Test), and verification of the dissolution test apparatus to ensure accurate, reproducible, and pharmacopoeial-compliant dissolution testing as per IP, BP, USP <711>, and EP 2.9.3.

2.0 Scope

This SOP is applicable to all dissolution test apparatus (USP Apparatus I – Basket and USP Apparatus II – Paddle) used in the Quality Control Laboratory for testing tablets and capsules.

3.0 Responsibility

DesignationResponsibility
QC AnalystOperation, calibration, PVT execution, testing, and documentation
QC SupervisorReview of calibration, PVT, and test results
QC ManagerApproval and compliance with IP/BP/USP/EP
EngineeringPreventive maintenance and servicing

4.0 References

  • Indian Pharmacopoeia (IP)
  • British Pharmacopoeia (BP)
  • USP <711> Dissolution
  • European Pharmacopoeia (EP) 2.9.3
  • Dissolution Apparatus Manufacturer’s Manual

5.0 Definitions & Abbreviations

TermDescription
DissolutionProcess by which active ingredient goes into solution from dosage form
PVTPerformance Verification Test (Chemical Calibration)
RPMRevolutions Per Minute
USP Apparatus IBasket type dissolution apparatus
USP Apparatus IIPaddle type dissolution apparatus

6.0 Safety and Precautions

  • Wear appropriate PPE during operation.
  • Handle hot dissolution media carefully.
  • Do not touch rotating parts during operation.
  • Ensure proper electrical grounding.

7.0 Instrument Description

The dissolution test apparatus consists of a temperature-controlled water bath, six or eight glass vessels, rotating shafts with paddles or baskets, RPM controller, and programmable timer. The apparatus operates under defined temperature and rotational speed conditions in compliance with pharmacopoeial standards.

8.0 Operating Procedure

  1. Switch ON the apparatus and water bath.
  2. Fill vessels with specified dissolution medium and volume.
  3. Allow temperature to stabilize at 37.0 ± 0.5 °C.
  4. Set RPM as per product monograph.
  5. Place dosage unit into each vessel.
  6. Lower paddles/baskets to specified height.
  7. Start apparatus and timer simultaneously.
  8. Withdraw samples at specified intervals.
  9. Analyze samples as per analytical method.

9.0 Physical (Mechanical) Calibration

ParameterMethodAcceptance Criteria
RPMCalibrated tachometer±4% of set RPM
TemperatureCalibrated thermometer37.0 ± 0.5 °C
TimerCalibrated stopwatch±2%
Shaft WobbleDial gaugeNMT 1.0 mm
Paddle/Basket HeightHeight gauge25 ± 2 mm
Vessel CenteringMechanical centering toolAs per USP/EP
Basket MeshVisual verification40 mesh
Vessel VolumeGraduated measurement1000 ± 1%

10.0 Mechanical Calibration Procedure

  1. Fill vessels with purified water.
  2. Stabilize temperature at 37.0 ± 0.5 °C.
  3. Verify RPM at commonly used speeds.
  4. Check shaft wobble using dial gauge.
  5. Verify paddle/basket height from vessel bottom.
  6. Check vessel centering and verticality.
  7. Verify timer accuracy.
  8. Record results in calibration log.

11.0 Chemical Calibration (Performance Verification Test – PVT)

11.1 Prednisone Tablet PVT

  • Medium: 500 mL Purified Water
  • Apparatus: USP Apparatus II
  • RPM: 50
  • Temperature: 37.0 ± 0.5 °C
  • Time Point: 30 minutes
  • Deaeration: Vacuum filtration or heating method
  • Analysis: UV at specified wavelength
  • Acceptance: Lot-specific USP limits

11.2 Salicylic Acid Tablet PVT

  • Medium: As per USP certificate
  • Apparatus: USP Apparatus I or II
  • RPM: As specified
  • Sampling Time: As per USP
  • Acceptance: Lot-specific USP limits

Chemical calibration is acceptable only if all vessels meet USP acceptance criteria.

12.0 Verification

Routine verification shall be performed using reference or in-house control tablets to ensure system suitability between PVT intervals.

13.0 Dissolution Media

  • 0.1 N Hydrochloric Acid
  • Acetate Buffer pH 4.5
  • Phosphate Buffer pH 6.8
  • Purified Water

14.0 Cleaning and Maintenance

  • Clean vessels and paddles after each use.
  • Rinse with purified water and dry.
  • Do not use abrasive materials.
  • Perform preventive maintenance as scheduled.

15.0 Documentation and Records

  • Maintain calibration and PVT records.
  • Document deviations and CAPA.
  • Retain records as per GMP policy.

DISSOLUTION APPARATUS CALIBRATION & PVT LOG

ParameterObserved ValueAcceptanceStatus
RPM±4%
Temperature37.0 ± 0.5
Shaft WobbleNMT 1.0 mm
PVT ResultUSP Limits

Prepared by: __________ Date: _______
Reviewed by: __________ Date: _______
Approved by: __________ Date: _______

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