TROPISETRON HYDROCHLORIDE METHOD OF ANALYSIS SOP


1.0  OBJECTIVE:
To lay down a procedure for the active raw material of the Tropisetron hydrochloride from the Pharmacopoeial specifications.
2.0  SCOPE:
This SOP shall be applicable in Q.C laboratory.
3.0  RESPONSIBILITY:
3.1  Q.C Analyst.
4.0  ACCOUNTABILITY:
4.1  Q.C Manager.
5.0  PROCEDURE:
5.1  Characters:
5.1.1        Appearance:
5.1.1.1  White or almost white powder.
5.1.2        Solubility:
5.1.2.1  Material and equipment:
5.1.2.1.1        Glassware (3 test tubes, 1 spatula).
5.1.2.1.2        Ethanol (96%).
5.1.2.1.3        Methylene chloride.
5.1.2.1.4        Purified water.
5.1.2.2  Sample:
5.1.2.2.1        Small quantity.
5.1.2.3  Method:
5.1.2.3.1        Take 3 test tubes and add small quantity of sample for testing solubility according to B.P specifications.
5.1.2.3.2        Add purified water in test tube 1 and observe.
5.1.2.3.3        Add ethanol (96%) in test tube 2 and observe.
5.1.2.3.4        Add methylene chloride in test tube 3 and observe
5.1.2.4  Observations:
5.1.2.4.1        The sample in test tube 1 containing with purified water is freely soluble.
5.1.2.4.2        The sample in test tube 2 containing with Ethanol (96%) is sparingly soluble.
5.1.2.4.3        The sample in test tube 3 containing with methylene chloride is very slightly soluble.
5.2  Identification tests:
5.2.1        UV/VIS absorption Spectrophotometry:
5.2.1.1  Material and equipment:
5.2.1.1.1        UV/VIS Spectrophotometer.
5.2.1.1.2        Glassware (according to requirement).
5.2.1.1.3        Methanol R.
5.2.1.2  Sample:
5.2.1.2.1        50.0mg.
5.2.1.3  Method:
5.2.1.3.1        Test solution:
5.2.1.3.1.1  Take a beaker of 100.0ml and add 50.0mg of sample in it.
5.2.1.3.1.2  Dissolve it in sufficient quantity of methanol R.
5.2.1.3.1.3  And dilute it to 25.0ml with the same solvent.
5.2.1.3.1.4  Dilute 1.0ml of this solution in another 100.0ml of beaker up to the mark with methanol R.
5.2.1.3.2        Spectral range:
5.2.1.3.2.1  220-360nm.
5.2.1.3.3        Absorption maxima:
5.2.1.3.3.1  At 228nm and 282nm.
5.2.1.3.4        Operate the UV/VIS spectrophotometer according to the SOP No. BM/QCEO/SOP027-00.
5.2.1.3.5        Measure the absorbance of the resulting solution at the maximum wavelength 228nm and 282nm.
5.2.1.3.6        Note down values of absorbance in annexure-1.
5.2.1.3.7        Calculate the absorbance ratio A228/A282.
5.2.1.4  Observations:
5.2.1.4.1        Absorbance ratio A228/A282:
5.2.1.4.1.1  1.3 to 1.4
5.2.2        Chlorides test:
5.2.2.1  Material and equipment:
5.2.2.1.1        Glassware (according to requirement).
5.2.2.1.2        Centrifuge machine.
5.2.2.1.3        Dilute nitric acid.
5.2.2.1.4        Purified water.
5.2.2.1.5        0.4ml of Silver nitrate R1.
5.2.2.1.6        Ammonia.
5.2.2.2  Sample:
5.2.2.2.1        Quantity of substance to be examined equivalent to about 2.0mg of chloride.
5.2.2.3  Method:
5.2.2.3.1        Take a test tube add in it 2.0ml of water with the help of pipette.
5.2.2.3.2        Dissolve in 2.0ml of water a quantity of the substance to be equivalent to about 2.0mg of chloride.
5.2.2.3.3        Acidify with dilute nitric acid.
5.2.2.3.4        And add 0.4ml of silver nitrate R1.
5.2.2.3.5        Shake and allow it to stand.
5.2.2.3.6        A curdled, white ppt is formed.
5.2.2.3.7        Centrifuge it in centrifugation machine, according to SOP.
5.2.2.3.8        The obtained ppt is wash with 3 quantities, each of 1ml, of water.
5.2.2.3.9        Carry out this operation rapidly is subdued light, degrading the fact that the supernatant solution may not become perfectly clear.
5.2.2.3.10    Suspend the precipitate in 2.0ml of water and add 1.5ml of ammonia.
5.2.2.4  Observations:
5.2.2.4.1        The precipitate dissolves easily with the possible exception of a few large particles which dissolves slowly.
5.3  Loss on drying:
5.3.1        Material and equipment:
5.3.1.1  Glassware (according to requirement).
5.3.1.2  Analytical weighing balance.
5.3.1.3  Oven.
5.3.2        Sample:
5.3.2.1  1.0g.
5.3.3        Method:
5.3.3.1  Weigh 1.0g of the test sample.
5.3.3.2  Set the oven apparatus. Operate it according to the SOP.
5.3.3.3  Place the sample into the tray and dry it.
5.3.3.4  Set the temperature of oven at 105oC for at least 45 minutes.
5.3.3.5  And wait till the sample loses its moisture.
5.3.3.6  After 45 minutes weigh the sample again by using analytical weighing balance i.e. the final weight.
5.3.3.7  Note down readings on given Annexure-2.
5.3.4        Observation:
5.3.4.1  Maximum 0.3%.
5.4  Assay:
5.4.1        Apparatus:
5.4.1.1  Glassware (according to requirement).
5.4.1.2  Potentiometer.
5.4.2        Material and reagents:
5.4.2.1  10.0ml of anhydrous acetic acid.
5.4.2.2  70.0ml of acetic anhydride.
5.4.2.3  0.1M Perchloric acid.
5.4.2.4  Crystal violet solution (as indicator).
5.4.3        Sample:
5.4.3.1  0.250g.
5.4.4        Method of analysis:
5.4.4.1  Take a 100.0ml of beaker and add 0.250g of sample in it.
5.4.4.2  Add 10.0ml of anhydrous acetic acid R in it and dissolve by using magnetic stirrer i.e. SOP.
5.4.4.3  Add 70.0ml of acetic anhydride R and dissolve by using magnetic stirrer i.e. SOP
5.4.4.4  Fill the right hand side burette with titrant 0.1M Perchloric acid.
5.4.4.5  Carry out a Potentiometric titration using crystal violet solution as an indicator.
5.4.4.6  Operate potentiometer according to SOP.
5.4.4.7  To neutralize analyte add titrant fixed volume (1ml, 0.5ml or 0.1ml) from burette every time note the reading of change in potential difference (millivolts) for each addition in given annexure-3.
5.4.4.8  Plot a graph, volume used v/s millivolts.
5.4.4.9  Find out the END POINT.
5.4.4.10    Peak of graph indicates END POINT i.e. the point at which maximum millivolts. Note down volume used at that point.
5.4.4.11    Perform blank titration without using sample. Similarly, as sample titration performed. Record observations in annexure-3.
5.4.4.12    Calculate volume used by substance by using formula:
Volume used by substance = Blank titration - Sample titration.
5.4.4.13    Calculate percentage purity of the sample by using formula:
%age purity = volume used by substance x factor x 100
                                                  Weight of sample
5.4.5        Factor:
5.4.5.1  1ml of 0.1M Perchloric acid is equivalent to 32.08mg of Tropisetron Hydrochloride C17H21ClN2O2.
5.4.6        Limit:
5.4.6.1  99.0% to 101.0% (dried substance).
6.0  REVISION LOG:
Revision No.
Effective Date
Reason
00

New SOP

7.0  REFERENCES:
7.1  The British Pharmacopoeia. Vol II., Official Monograph / Tropisetron hydrochloride: 2015, pp. 1115-1117.
7.2  The British Pharmacopoeia. Vol V., Official Monograph /Qualitative Reactions and Tests: 2015, pp. 266-270.
8.0  ANNEXURES:
Annexure 1: Observations of UV/VIS spectrophotometer.
Annexure 2: Observations of Percentage Loss of drying by using oven.
Annexure 3: Assay observations and calculations (Potentiometric titration).





Annexure: 1
Observations and Calculations of UV/VIS spectrophotometer
UV/VIS spectrophotometer
Model: _____________________________                             Date: _________________
OBSERVATIONS:
Thickness of cell:

Spectral range:
228-360nm.
Maxima absorption wavelength:
228nm and 282nm.
Sample:

Other reagent used:


No. of obs.
Concentration
Wavelength
Absorbance









CALCULATIONS:
Absorbance ratio A228/A282 =





Results: _______________
Remarks: ______________________________________________________________


Annexure: 2
Observations of percentage loss of drying by using Oven
Percentage loss of drying by using Oven
Weight of Sample = _____________
Time period = _____________
Pressure= _________________
Sr.#
Time (min)
Weight of sample (g)
% Loss of Moisture
Initial weight
Final weight















Average % Loss of Moisture: _____________

% Loss of Moisture:









Remarks: _______________________________________________________________



Annexure: 3
Assay observations and calculations (Potentiometric titration)
Potentiometric titration
Reference electrode: ___________________
Indicator electrode: ____________________
Speed of magnetic stirrer: _______________
Titrant used: __________________________
Indicator: ____________________________
Blank titration:
Sr.#
Volume used
(ml)
Voltmeter
(mV)












Plot a graph, volume used v/s millivolts and find out peak of graph i.e. END POINT of blank titration.
Sample titration:
Sr.#
Volume used
(ml)
Voltmeter
(mV)












Plot a graph, volume used v/s millivolts and find out peak of graph i.e. END POINT of sample titration:
Volume used by Blank titration: __________________
Volume used by Sample titration: _________________
Volume used by substance = Blank titration - Sample titration.






mV used by Blank titration: __________________
mV used by Sample titration: _________________
mV used by substance = Blank titration - Sample titration.




Volume used by substance: _______________________
Voltmeter (mV) used by substance: _________________








RESULT: ____________________________________________________________

9.0  ABBREVIATIONS:
Abbreviation
Expanded Form
SOP
Standard operating procedure
&
And
No.
Number  
Ltd.
Limited
QCA
Quality control active ingredient
F
Format
Q.C
Quality control
v/s
Verses
mV
Millivolts
g
Grams
ml
Milliliter
Min
Minutes
oC
Degree centigrade
mg
Milligram
M
Molar
%
Percentage
R
Reagent
λ
Lambda
UV/VIS
Ultraviolet/ visible
w/v
Weight by volume
nm
Nanometer
Hrs.
Hours
A
Absorbance


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