Calibration of Dissolution Testing Apparatus
Learn the calibration of Dissolution Test Apparatus using Disintegrating Prednisone tablets.
RPM CALIBRATION
1. Enter the required RPM value in the range of 30 to 200.
2. Press ENTER key to terminate. The SET RPM key LED will now be put off. If the RPM value is not in the above-mentioned range error message
Er is displayed on the RPM display.
3. If the error message is displayed then go back to resetting. If the error message “Er” is displayed on the RPM display and the ENTER key is
pressed then the last correctly set value of RPM for that step will be accepted and the SET RPM LED will be put off.
4. Suppose RPM value 100 is to be entered. First press the SET-RPM key. The SET-RPM key LED will be illuminated., Next press number 1 key
once following by 0 key twice, Then press ENTER key. The SET-RPM key LED will go OFF, Then the RPM DISPLAY will show 100.
5. Record the RPM manually & enter in the calibration log.
TEMPERATURE CALIBRATION
1. Press the SET key. The SET TEMP key LED will be illuminated TEMP.
2. Enter the required temperature value in the range of 30 °C to 100 °C.
3. Press ENTER key to terminate. The SET TEMP key LED will now be put off. If the Temp. is not in the above-mentioned range then the error
message Er is displayed on the TEMP display. If the error message is displayed then go back to resetting.
4. If the error message “Er” is displayed on the TEMP display and the ENTER key is pressed then the last correctly set value of TEMP for that step
will be accepted and the SET TEMP LED will be put off.
5. Set the temp. 35°, 37° & 40°C and check the temperature of the bowl with the thermometer & record the data in calibration log.
6. To view the set temperature presses the SET TEMP key again. Then the TEMP DISPLAY will show set temp in °C.
7. If the calibration is not found within the specified limits immediately inform to QC head.
Affix the calibration label on the instrument.
CALIBRATION FOR DISINTEGRATING TYPE PREDNISONE TABLETS 50 MG
1. Ensure that mains of instrument and supply are “ON”.
2. Set the time program for 30 minutes, temperature 37° C + 0.5° C and for 50 RPM.
Fit the paddle apparatus.
3. Place 900 ml of deaerated water.
4. After achieving the temperature place one tablet in each bowl and start the time program.
5. After the completion of time program withdraw the sample solution from each bowl and filter through the whatman filter no. 41 in individual tubes.
Discard first 50 ml filtrate, take 5 ml of filtrate and dilute with water to 25 ml and take the absorbance at 242 nm against the water.
6. Prepare the standard solution by dissolving the 25 mg of prednisone to 50 ml of water, further dilute it 5 ml to 50 ml with the water, further dilute 5
ml to 25 ml with water and take the absorbance at 242 nm against the water. (If the standard is not dissolved first add not more than 2.5 ml of
alcohol)
7. Calculate the content of prednisone. Also, carry out above procedure for 100 rpm. Enter the data in the calibration log.
8. Also, carry out above procedure by changing the basket apparatus for 100 RPM and enter the data in calibration log.
• If the calibration is not found within the specified limits immediately inform to QC head.
• Affix the calibration label on the instrument.
• In the case of noticing any malfunctioning of the instrument, inform the maintenance dept. and Head of the dept.
Checking of physical parameters for the apparatus:
Basket
Make Identity of the each basket which is in use and make the inventory. Check the physical parameters for the each basket like appearance,
opening, height, total height of basket, ID of basket, external diameter of basket, external diameter of ring, vent hole diameter, height of coupling
disk. All parameters should fall within the limit as given in the calibration log.
Paddle
Make identity of the each paddle which is in use and make the inventory. Check the physical parameters for the each paddle like appearance,
height, shaft diameter, blade upper chord, lower chord, height, radius (disk), thickness, and distance from bottom, distance shaft axis and vertical
axis of vessel. All parameters should be fall within the limit as given in the calibration log.
Checking of wobbling, Rotations, and distance parameters for the apparatus
Wobbling
• Fix the paddle/basket apparatus to the instrument, lower the apparatus.
• Fix the wobbling meter on the top of the bowl.
• The needle of wobbling meter should touch to the surface of the apparatus.
• Measure the wobbling on the meter.
Rotation
• Fix the paddle/ basket apparatus to the instrument.
• Set the RPM 50/100.
• The needle of tachometer should touch to the surface of the apparatus.
• Press the “start” key of tachometer to start
• Fix the tachometer with apparatus.
• Start the rotation.
• The tachometer will show you result on display.
Distance from the apparatus
• Fix the paddle/basket apparatus to the instrument, lower the apparatus.
• Insert the vernier calipers between the bottom of the apparatus and the bottom of the bowl.
• Measure the reading on the display.
Related: Tablet Dissolution Test in Different Stages (S1, S2 and S3)
TEMP./RPM CALIBRATION