SOP for Operational Qualification of Dissolution Tester
1.0 OBJECTIVE
To qualify the equipment for reliable and accurate results.
2.0 SCOPE
This procedure is applicable to all dissolution test apparatus installed in chemical analysis area of quality control laboratory.
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3.0 RESPONSIBILITY
3.1 Doing: Technical Assistant/Service engineer
3.2 Checking: Executive /Manager
4.0 ACCOUNTABILITY
Head of the Department
Qualification frequency : Once in four month
5.0 PROCEDURE
5.1 QUALIFICATION FOR HEAT DISTRIBUTION:
5.1.1 Operate the instrument as per respective operating procedure.
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5.1.2 Set the temperature by the temperature knob at 37.8°C. Start the stirrer at 50 rpm. Ensure that temperature indicator is calibrated and calibration tag is affixed.
5.1.3 Note the observed temperature as shown in Annexure
5.1.4 Observe the rise in temperature on digital temperature indicator. As soon as it shows 37°C, consider that time as “ZERO” minute. At this time, measure the temperature individually of all dissolution bowls by calibrated thermometer.
5.1.5 Record the temperature at interval as indicated in Annexure. The apparatus is satisfactory if the temperature observed for all bowls are between 36.5 °C and 37.5°C
5.2 QUALIFICATION FOR UNIFORMITY IN ROTATIONAL SPEED:
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5.2.1 Operate the instruments as per respective standard operating procedure.
5.2.2 First set the speed at 50 rpm.
5.2.3 Count the rotation by Tachometer.
5.2.4 Change the setting to 75 rpm, 100 rpm and 150 rpm Count the rotation as above.
5.2.5 Record the measured rpm in Annexure. The apparatus is satisfactory if the rotations at different speed are within limits given in Annexure.
5.3 QUALIFICATION OF HEIGHT:
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(Distance between the bottom edge of the apparatus to the inner lower surface of the vessel)
5.3.1 Use calibrated vernier for qualification of height distance validation.
5.3.2 Keep all jars empty and remove the lid from it.
5.3.3 Clamp all jars using jar holders provided on jar plate.
5.3.4 Lower the stirrer unit to the bottom position till it stops automatically.
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5.3.5 Use the above vernier, hold it vertical and touching parallel to the paddle shaft.
5.3.6 Touch the reference bracket of the vernier at the bottom face of the paddle.
5.3.7 Slide vernier scale down till the point of stylus touches the jar bottom.
5.3.8 Lock the vernier at this position and lift up the stirrer unit.
5.3.9 Take out the vernier and note the readings.
5.3.10 Limit : 25+/- 2mm
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5.4 QUALIFICATION FOR CENTRING WITH RESPECT TO THE JAR
5.4.1 Use the centring device for centring of paddle/basket rod with the jar.
5.4.2 Empty all the jars and keep them without the jar lid in respective positions..
5.4.3 Lower the stirrer unit down so as the blades of the paddle just enters the jars.
5.4.4 Fix the centring gauge meter on the jar.
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5.4.5 Rotate the device with both hands ground the shaft of the paddle in the jar, ensure that the bottom plate is not lifted from the jar or is in contact with the jar properly.
5.4.6 Note the four different reading from Jar to Paddle with Vernier and calculate the jar centring with respective formula.
5.4.7 Record the readings as per Annexure
5.4.8 U.S.P. Limit : Jar centring should be within 2mm
5.5 QUALIFICATION FOR PADDLE /BASKET ROD WOBBLING
5.5.1 Use wobble gauge meter.
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5.5.2 Empty all the jars and keep them without the jar lid in respective position.
5.5.3 Lower the stirrer unit down so as the blades of the paddle/basket jars enter the jars.
5.5.4 Ensure that the paddle or basket rod is properly tightened with the spindle. Using the keys provided to tighten it.
5.5.5 Fix the wobble gauge meter so that the pointer is just pressed against the paddle shaft.
5.5.6 Start the rotation of Paddle/Basket rod.
5.5.7 Note the reading of the maximum deviation of the pointer of wobble gauge meter
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5.5.8 Repeat the procedure for all remaining paddle or basket rods.
5.5.9 Record the readings as per Annexure
5.5.10 U.S.P. Limit :
1. For Basket wobble : Should be less than 1.0 mm
2. For Paddle wobble : Should be less than 0.5 mm
6.0 ABBREVIATIONS
6.1 rpm.= Rotation per minute
6.2 °C = Degree centigrade
6.3 hr = hour
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