Calibration of Refractometer : Pharmaguideline

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Calibration of Refractometer

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

PROCEDURE

Calibrate the apparatus using following solvents:
Name of the Liquid
Refractive Index
Temperature
Distilled Water
1.3325
20°C ± 0.5°C
Toluene
1.4969
20°C ± 0.5°C
Carbon Tetrachloride
1.4603
20°C ± 0.5°C
Requirement: Tolerance: ± 0.0005
Frequency: Once in a month.
Maintenance/ Repairs: When the instrument does 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
1
Distilled Water
1.3320 to 1.3330
2
Toluene
1.4964 to 1.4974
3
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 pharmaguideline.com, 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. Thanks for taking time for sharing this article, it was excellent and very informative. It’s my first time that I visit here. I found a lot of informative stuff in your article. Keep it up. Thank you.

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  2. Very good information & So simple that can be easily implemented.

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