Disintegration Apparatus Calibration SOP

Step by Step SOP for Calibration of Disintegration Test Apparatus with acceptance criteria and FAQs.

Calibration of Disintegration Test Apparatus (SOP Guide)

1. Introduction

The Calibration of Disintegration Test Apparatus is a critical quality control procedure in pharmaceutical laboratories. It ensures that tablets and capsules disintegrate within specified time limits under standardized conditions, as required by pharmacopeial standards such as USP and BP.

Proper calibration guarantees accuracy, reproducibility, and regulatory compliance in dissolution and disintegration testing.

2. Objective

To provide a detailed Standard Operating Procedure (SOP) for the Calibration of Disintegration Test Apparatus, including frequency, temperature control, and distance movement verification.

3. Scope

This SOP applies to all disintegration test apparatus used in pharmaceutical quality control laboratories.

4. Calibration Frequency

• Routine Calibration: Once per month
• Post-Maintenance Calibration: After any repair or servicing
• If the instrument fails, label it as “Out of Calibration” until recalibrated

5. Calibration Parameters

Calibration is performed under three main parameters:

1. Number of Cycles (Frequency)
2. Temperature Maintenance
3. Distance Travelled

A) Calibration of Number of Cycles

Acceptance Criteria

• 29 to 32 cycles per minute throughout operation

Procedure

1. Start the apparatus and allow continuous operation.
2. Record the up-and-down movement frequency of the basket rack assembly.
3. Take readings for 5 minutes at intervals of 15 minutes.
4. Do not stop the instrument during measurement.
5. Record five readings.
6. Calculate cycles per minute:
   • Divide total cycles by 5.
7. Perform for both:
   • Side A (Left)
   • Side B (Right)

Observation Table (Keep Same Format)

Start Time (Mins.)	End Time (Mins.)	Side A (Left hand side of the operator).		Side B (Right hand side of the operator).
		No. Of cycles (A)	No. of cycles per min. (A / 5)	No. Of cycles (B)	No. Cycles per min. (B / 5)
0	5
15	20
30	35
45	50
60	65

B) Calibration of Temperature Maintenance

Acceptance Criteria

• Temperature must remain 37 ± 1°C

Procedure

1. Set temperature to 37°C.
2. Fill the beaker with water.
3. Attach basket rack assembly and start operation.
4. Insert a calibrated thermometer into one tube.
5. Allow stabilization between 36°C to 38°C.
6. Record temperature readings:
   • Initially
   • Every 15 minutes up to 120 minutes
7. Insert thermometer 2–3 minutes before reading (do not keep it inside continuously).
8. Perform for both sides (A & B).

Observation Table

Time (In Mins.)	Temperature (In °C)
	Side A (Left hand side of the operator).	Side B (Right hand side of the operator).
Initial
After 15
After 30
After 45
After 60
After 75
After 90
After 105
After 120

C) Calibration of Distance Travelled

Acceptance Criteria

• Distance must be 53 to 57 mm

Procedure

1. Fix the basket rack assembly firmly.
2. Attach white paper parallel to the movement path.
3. Mark a reference point at the highest position.
4. Start the apparatus.
5. Mark the same point at the lowest position.
6. Measure the distance between the two marks using a calibrated ruler.
7. Remove the paper.
8. Perform measurements:
   • Initially
   • After 60 minutes
   • After 120 minutes
9. Repeat for both sides (A & B).

Observation Table

Time in mins.	Distance traveled by the basket
	Side A (Left hand side of the operator)	Side B (Right hand side of the operator)
Initial
After 60
After 120

6. Maintenance and Troubleshooting

• If any parameter fails:
  • Label equipment as Out of Calibration
  • Perform maintenance or repair
  • Recalibrate before reuse

7. References

• United States Pharmacopeia (USP)
• British Pharmacopoeia (BP)

Frequently Asked Questions (FAQs)

1. What is Calibration of Disintegration Test Apparatus?

It is the process of verifying that the apparatus operates within specified limits for accurate tablet disintegration testing.

2. Why is calibration important?

It ensures reliable, reproducible, and compliant pharmaceutical test results.

3. What is the acceptable cycle frequency?

29 to 32 cycles per minute.

4. What temperature should be maintained?

37 ± 1°C throughout the test.

5. What is the acceptable distance travelled?

Between 53 mm and 57 mm.

6. How often should calibration be performed?

At least once per month or after maintenance.

7. Why measure both Side A and Side B?

To ensure uniform performance across the entire apparatus.

8. Can the instrument be stopped during calibration?

No, continuous operation is required for accurate readings.

9. What should be done if calibration fails?

Label the instrument “Out of Calibration” and repair it before reuse.

10. Which standards govern this calibration?

USP (United States Pharmacopeia) and BP (British Pharmacopoeia).