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S.O.R* measurement of Ribavirin


▶ Brief instruction:

   In the field of pharmaceutical industry, Chirality**, the concept is of great practical importance because most of biomolecules and pharmaceuticals are chiral. The chiral molecule has the ability to rotate plane-pola rized light. The rotation of light is measured using a polarimeter and is expressed as optical rotation. This is a common technique in studying chirality. 

  In pharmaceutical company, quality control is the key point in the process of manufacturing drugs which will ensure the drug’s quality and safety. Product inspection and process control inspection are the key chains in FDA and GMP requirements. This is related to the inspection instruments.

  Insmark Digital Polarimeter (FD series) mainly used in food and pharmaceutical industry.  This instrument has special designed software which meets the U.S. federal standard 21CFR  requirements. The software will ensure the measurement data are true and reliable through  a  series of measures, such as user rights management, audit trail documents, electronic records,  electronic signatures, data security transmission software.


  Polarimeter can be used to characterize the chiral drugs, such as Cephalosporin antibiotics, most of amino acids, vitamins, antiviral drugs which have chiral characteristics. The sample in this case Ribavirin is a broad-spectrum antiviral drug, widely used in the prevention and treatment of viral diseases. Specific Optical Rotation index is an important index to test the quality of this medicine.

▶ Operation process:


A. Sample from: Zhejiang XX Pharmaceutical Company

B. Instrument:IP-digiFD2 Polarimeter (FD: Food and Drug system)

C. Laboratory: with air-conditioner. Humidity control device

D. Room temperature: 21.0 ℃, Humidity 40%

E. Operation procedure:

1)  The instrument installation will be done by the Insmark Engineer. Performing IQ test,  install the digi_link_FD data output software on the customer computer.

2)  Training the laboratory administrator (Admin.), and set up the software according to the specific requirements of the laboratory

3)  Complete the OQ verification, verify the accuracy and repeatability of the instrument with the standard quartz tube, and verify the accuracy of the                   thermometer

4)  Train the operator to take a actual sample measurement.

a.  Sample preparation: weigh the sample 4 grams, transfer it to 100ml volumetric flask, add DI water to dissolve it. Mix it well, then add DI water to the mark.
b.  Setting the measurement method: all the methods only can be set by the Admin. IP-digiFD2 has thermostat system(Peltier). Admin can set temperature at         20.0℃ to ensure the accuracy of the measurement.
c.    Operator log in his own account to take the sample measurement.

    ➢   Operator can select an corresponding method. 

    ➢   Add DI water to the 1dm thermostat sample tube to ‘zero’ the instrument. 
    ➢   Add sample to the same sample tube, take the sample measurement.
    ➢   The operator signed and submitted his measurement result.

d.  The admin approve the measurement data. Transfer the data to PC in PDF format,       this will ensure that the data is true and reliable without tampering.

e.  After all the training sections, the administrator sign the documents.


  The customer is fully satisfied with the FD Polarimeter. This instrument  operation system meets the requirements of 21CFR and GMP. This will help the QC  department in improving the quality of data integrity management, farther more  in product quality control management.


*S.O.R.: Specific Optical Rotation

** Chirality is a geometric property of some molecules and ions. The presence of an asymmetric  carbon center is one of several structural features that induce chirality in organic and  inorganic molecules. 

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