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Calibration of Refractometer

Learn how to verify the performance of Refractometer using Distilled Water, Toluene and Carbon Tetrachloride as standard.


Calibrate the apparatus using following solvents;
Name of the Liquid
Refractive Index
Distilled Water
20°C ± 0.5°C
20°C ± 0.5°C
Carbon Tetrachloride
20°C ± 0.5°C
Requirement : Tolerance: ± 0.0005
Frequency : Once in a month.                 

Maintenance / Repairs:

When the instrument do not comply with the requirement / tolerance range specified above, the instrument should be labeled “OUT OF CALIBRATION” and should be repaired / serviced.
REFERENCE:  Operator’s instructions manual.

                                                     QUALITY ASSURANCE DEPARTMENT
                                       CALIBRATION REPORT OF REFRACTOMETER
Reference : 
Date -
Frequency -
Instrument No. - 
Make – 
Model – 

Sr. No.
Name of the Liquid
Observed Refractive Index
20°C ± 0.5°C
Acceptance criteria
 Refractive Index
20°C ± 0.5°C
Distilled Water
1.3320 to 1.3330
1.4964 to 1.4974
Carbon Tetrachloride
1.4598 to 1.4608
Conclusion :
Calibration complies / does not comply as per the acceptance criteria.
Next calibration due on :
Done  By :
Date :
Checked By :
Date :

Ankur Choudhary is India's first professional pharmaceutical blogger, author and founder of Pharmaceutical Guidelines, a widely-read pharmaceutical blog since 2008. Sign-up for the free email updates for your daily dose of pharmaceutical tips.
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1 comment:

Refractometer said... on 9/5/11 17:38

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