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Journal of Drug Delivery and Therapeutics

Open Access to Pharmaceutical and Medical Research

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Open Access  Full Text Article                                                                                                                                                                       Research Article 

Stability-Indicating Analytical Method Development and Validation of Thiocolchicoside and Ibuprofen in Tablet Dosage Form by RP-HPLC Method

Jadhav Ankush P.1*, Datar Prasanna A.1, Kedar Tejashree R.1, Kardile Deepak P.2 

Department of Pharmaceutical Quality Assurance, Rajgad Dnyanpeeth’s College of Pharmacy, Bhor- Pune, Maharashtra, India. (Pin. 412 206)

Department of Pharmaceutical Chemistry, Rajgad Dnyanpeeth’s College of Pharmacy, Bhor- Pune, Maharashtra, India. (Pin. 412 206)

Article Info:

_______________________________________________

Article History:

Received 18 July 2022      

Reviewed 23 August 2022

Accepted 29 August 2022  

Published 15 Sep 2022  

_______________________________________________

Cite this article as: 

Jadhav AP, Datar PA, Kedar TR, Kardile DP, Stability-Indicating Analytical Method Development and Validation of Thiocolchicoside and Ibuprofen in Tablet Dosage Form by RP-HPLC Method, Journal of Drug Delivery and Therapeutics. 2022; 12(5):103-113

DOI: http://dx.doi.org/10.22270/jddt.v12i5.5581         _______________________________________________

*Address for Correspondence:  

Mr. Ankush Pralhad Jadhav (Research Scholar), Department of Pharmaceutical Quality Assurance, Rajgad Dnyanpeeth’s College of Pharmacy, Bhor- Pune, Maharashtra, India. (Pin. 412 206)

Abstract

___________________________________________________________________________________________________________________

Objective: First time, a simple, specific, accurate and economic stability-indicating reverse phase high performance liquid chromatographic method was reported for the simultaneous estimation of THIO and IBU in tablet dosage form. Method: The method has shown adequate separation of THIO and IBU from their degradation products. Separation was achieved on an Inertsil, 3V ODS C18, 4.6 mm x 250 mm, 5μ column at wavelength of 248 nm, using a mobile phase Methanol: Dist. water (50:50, v/v) in a mode of isocratic elution at a flow rate of 1.0 ml/min. Results: This method results has minimum retention time for THIO and IBU i.e. 2.317 and 1.075 min. correspondingly, which gives fast separations of drugs furthermore both drug combinations are subjected to acidic, base, oxidation, thermal and photolytic stress environment. Thus stressed samples of these drugs are analyzed by the proposed analytical method. Quantitation was achieve with UV detection at 248 nm based on peak area with linear calibration curve at concentration range 100-600 ppm for THIO and 400-2400 ppm for IBU. The LOD's found 2.00 and 0.54 for THIO and IBU in addition to that LOQ's were found to be 6.08 and 1.63 resp. Conclusion: The statistical analysis proved that this novel proposed method was established to be specific, accurate, precise and stability-indicating study do not shows interfering peaks of degrades and excipient. The proposed method is therefore suitable for purpose in quality-control laboratories for quantitative analysis of THIO and IBU drugs individually and in combined dosage form, as it is performed and validated as per ICH Q2 (R1) and Q1A (R2) guideline and it meets to specific acceptance criteria.

Keywords: Thiocolchicoside (THIO), Ibuprofen (IBU), RP-HPLC, Stability-indicating, ICH.

 


 

1. INTRODUCTION:

1.1 Introduction of Drugs:

THIO is a glycoside of natural anti- inflammatory moiety which is derivative of colchicine from semi- synthetic process. It procured from the Superba Gloriosa flower seeds. It gives anti-inflammatory as well as analgesic with muscle relaxant effects. It works through selective binding to the Gamma (y) Amino Butyric Acid i.e. GABA - A receptor. By activating the GABA inhibitory motor pathway it prevents muscle contractions so mainly it has major role in the cure of orthopedic and disorders of rheumatology 2- 4The molecular formula of THIO is C27H33NO10S and molecular weight is 563.6 g/mol. Fig.1-A shows structure of THIO.

IBU is derived from propionic acid which has a non-steroidal anti-inflammatory drug (NSAID) activity. IBU is a non-selective cyclooxygenase i.e. COX inhibitor therefore this drug inhibits the activity of both cyclooxygenase i.e. COX-1 and COX-2. The inhibition of cyclooxygenase-2 activity minimizes the overall synthesis of prostaglandins which involved in mediating inflammation, pain, fever, and swelling 5, 6The chemical formula for IBU is C13H18Oand molecular weight‎ is ‎206.28 g/mol. Fig.1-B shows structure of IBU.


 

 

             

Figure 1-A: Thiocolchicoside                                         Figure 1-B: Ibuprofen


 

1.2 Background of study:

To the best of our knowledge, there is no reported RP-HPLC method for simultaneous estimation of THIO and IBU in pharmaceutical formulations, previous to our work. Thus, efforts were made to develop fast, selective and sensitive stability-indicating analytical method for the estimation of THIO and IBU in their tablet dosage form using Reverse Phase Chromatography i.e. RPC method. In the current work author developed a simple, accurate, reliable and reproducible stability-indicating RP-HPLC method which was duly validated by statistical parameters precision, accuracy and recovery as per ICH Q2 (R1) and Q1A (R2) guideline within all acceptance criteria.

2. MATERIALS AND METHODS:

2.1. Chemicals and reagents:

The commercial tablets Thiocolfen (Thiocolchicoside 400 mg and Ibuprofen 4 mg) were procured from the local drug market. Chemical is used as Acetonitrile (HPLC Grade), Methanol (HPLC Grade) and Dist. water (HPLC Grade) etc.

2.2 Instrumentation:

Instruments were as follows UV-Spectrophotometer (Jasco V 530 PC), HPLC- Schimadzu Model consisting of Inertsil, 3V ODS (C18 4.6 mm x 250 mm, 5μ columns), pH Meter (Chemiline). 

2.3 Preparation of standard stock solutions:

2.3.1 Ibuprofen standard stock:

100.1 mg IBU standard was weighed and dissolved in 25 ml with diluent (use mobile phase as a diluent).

2.3.2 Final standard solution:

20.1 mg of THIO drug was weighed and add 5.0 ml of IBU standard stock dissolved in 25.0 ml with diluent.

2.4 Preparation of sample solutions:

The mean weight of twenty tablets was taken and after that it crushed to fine powder; amount equal to (powder) 100 mg was kept in flask of volumetric (100 ml). The drugs ratio was 1:100. This was then dissolving in 50 ml of diluent by sonication for about 10 min. The volume is made to the mark by diluent and filtered by Whatmann filter paper (no. 41) to forms 1000 µg/ml of soln. and the this soln. was utilized to prepare samples of various attentiveness.

2.5 Selection of detection wavelength:

From the standard stock solution further dilutions were done using diluent and scanned over the range of 200-400 nm and the spectra were overlain. It was observed that maximum wavelength of THIO and IBU 256 nm and 228 nm resp. and these drugs showed considerable absorbance at 248 nm and their overlain spectra of is given in fig. 2.


 

 


Thiocolchicoside at 256 nm

Isoabsorptive Point at 248 nm 

Ibuprofen at 228 nm

  


Figure 2: Overlain spectra of Thiocolchicoside & Ibuprofen

 

2.6 Chromatographic conditions:

HPLC experiment was carried out on a Schimadzu LC-2030 PLUS (IND) System separation module, with photodiode array detector using Auto sampler. The analytical column used for the separation was Inertsil, 3V ODS (C18 4.6 mm x 250 mm, 5μ columns). Optimized chromatographic conditions as shown in the table 1-A, Characteristic chromatogram was shown in fig. 3 and system suitability parameters of THIO and IBU shown in table 1-B.

Table 1-A: Optimized Chromatographic conditions

Sr. no.

Parameters

Method

1

Stationary phase (column)

Inertsil, 3V ODS (C18 4.6 mm x 250 mm, 5μ column)

2

Mobile phase

Methanol: Dist. water in 50:50, v/v

3

Flow rate (ml/min)

1.0

4

Column temperature (0C)

30 ºC

5

Volume of injection (μl)

20

6

Detection wavelength (nm)

248 nm.

7

Run time

5 min.

8

Retention Time (min.)

Thiocolchicoside = 2.317, Ibuprofen = 1.075

 

Figure 3: The chromatogram of optimized standard mixture

 

Table 1-B: System suitability parameters of optimized standard mixture 

Sr. no.

Parameter

Retention Time

Resolution

Peak Area %

Theoretical Plates

Tailing Factor

1

Ibuprofen

1.075

--

83.633

8771

1.304

2

Thiocolchicoside

2.317

6.909

16.367

9866

1.703

 

 


 

3. METHOD DEVELOPMENT:

The objective of this experiment was to achieve good separation with good resolution peaks between all the components by trying different proportions of solvents like Methanol, Acetonitrile and Dist. water testing. For that we have tried different mobile phases and we obtained optimized chromatogram by using Methanol (MeOH) and Dist. water (H2O) in 50:50, v/v ratios at 1 ml/min flow rate with 20 μl injection volumes in 5 min. run time and it was detected at 248 nm wavelengths. This trial gives more asymmetry & sharp peaks with good resolutions which is shown in fig. 3 and table 1-B.

4. METHOD VALIDATION:

This method was validated according to ICH validation parameters which gives acceptable results 16- 19;

5. FORCED DEGRADATION STUDIES:

Sample is stressed by different conditions to assess stability indicating aspect of the method. The degraded sample is analyzed using a HPLC 23, 24;


 

 

Table 2: Sample and percentage impurity detection in forced degradation studies

Sr. no.

Sample

% Impurity

1

As such sample

Not Detected

2

Acid Sample (2 mL of 2M HCl, heat for 10 minutes)

Detected

3

Base Sample (2 mL of 2M NaOH, heat for 10 minutes)

Detected

4

Oxidation Sample (2 mL of 2M H2O2, heat for 10 minutes)

Detected

5

Thermal Sample (Heat for 30 minutes at 50°C)

Detected

6

Photo-stability Sample (At 254 nm)

Detected

7

Photo-stability Sample (At 366 nm)

Detected

 

 

 

 


 

6. RESULTS AND DISCUSSION:

6.1 Accuracy:

Accuracy study was performed; in that drug Assay was conducted in duplicate as per desired test method with equivalent amount of THIO & Ibuprofen into flask of volumetric each for level of spike to become the mass of THIO & IBU equivalent to 25 %, 50 %, 75 %, 100 %, 125 %and 150 %for amount labelled as per desired method of test. The mean % recovery of the THIO & IBU at each apex level is not less than 90.0% and not more than 110.0%. Result of recovery study shown in table 3-A and 3-B.


 

 

Table 3-A: Data of Accuracy for THIO

Concentration

% of spiked level

 

Area

Amount

Added (ppm)

Amount

Found (ppm)

%

Recovery

%

Recovery (Mean)

25 % Sample 1

1233203

1250

1258

100.68

 

100.35

25 % Sample 2

1225136

1250

1250

100.02

50 % Sample 1

1464534

1500

1497

99.78

 

99.97

50 % Sample 2

1470057

1500

1502

100.15

75 % Sample 1

1704966

1750

1737

99.24

 

99.21

75 % Sample 2

1704038

1750

1736

99.19

100 % Sample 1

1944899

2000

1982

99.10

 

99.07

100 % Sample 2

1943776

2000

1981

99.04

125 % Sample 1

2197581

2250

2241

99.62

 

99.64

125 % Sample 2

2198298

2250

2242

99.65

150 % Sample 1

2445173

2500

2492

99.67

 

99.63

150 % Sample 2

2443682

2500

2490

99.60

 

 

Table 3-B: Data of Accuracy for IBU

Concentration

% of spiked level

 

Area

Amount added (ppm)

Amount found (ppm)

%

Recovery

% Recovery (Mean)

25 % Sample 1

6092161

5000

4962

99.25

 

99.01

25 % Sample 2

6063332

5000

4939

98.78

50 % Sample 1

7198356

6000

5872

97.86

 

98.06

50 % Sample 2

7220608

6000

5895

98.25

75 % Sample 1

8434814

7000

6858

97.97

 

97.96

75 % Sample 2

8432762

7000

6856

97.95

100 % Sample 1

9778632

8000

7954

99.43

 

99.47

100 % Sample 2

9787977

8000

7962

99.52

125 % Sample 1

11005046

9000

8960

99.55

 

99.95

125 % Sample 2

11093755

9000

9032

100.35

150 % Sample 1

12302362

10000

10006

100.06

 

100.01

150 % Sample 2

12357775

10000

9996

99.96

 

 


 

6.2 Precision:

The assays of THIO & IBU are not less than 90.0 % and not more than 110.0 %. The test results of combination gives that the method for test is precise. Result of recovery study for method and system precision are shown in table 4-A and 4-B.


 

 

 

 

Table 4-A: Method precision studies of THIO and IBU

Injection:

1000 ppm Concentration

Peak area

of THIO

Average % Assay of THIO

Injection:

4000 ppm Concentration

Peak area of

IBU

Average

% Assay of IBU

1

 

990063

 

100.51

1

4953888

 

100.36

989855

4946376

2

989271

 

100.72

2

4934145

 

100.23

989901

4928472

3

996177

 

101.82

3

4872786

 

99.62

996022

4887965

4

995031

 

101.04

4

4896768

 

99.26

995876

4897076

5

992971

 

101.11

5

4897116

 

99.15

996082

4869558

6

995118

 

100.91

6

4895233

 

99.30

991696

4895704

Mean

993172

101.02

Mean

4906257

99.65

SD

2844.127

0.449

SD

27702.968

0.523

% RSD

0.29

0.44

% RSD

0.56

0.53

 

Table 4-B: System precision studies of THIO and IBU

Injection:

1000 ppm Concentration

RT of

THIO

Peak area

of THIO

Injection:

4000 ppm Concentration

RT of

IBU

Peak area

of IBU

1

2.317

991488

1

1.075

4943891

2

2.317

991189

2

1.075

4942174

3

2.317

991743

3

1.075

4947109

4

2.317

991287

4

1.075

4947168

5

2.317

993227

5

1.075

4948164

Mean

2.317

991787

Mean

1.075

4945701

SD

0.000

832.547

SD

0.000

2545.425

% RSD

0.00

0.08

% RSD

0.00

0.05

 


 

6.3 Linearity:

A series of solutions are prepare using IBU & THIO working standard at concentration levels for IBU from 400 ppm  to 2400 ppm of target concentration & concentration levels for THIO from 100 ppm to 600 ppm of target concentration. The line are fit of the system was illustrated graphically. The calibration curve (Concentration V/s. Response) of THIO and IBU are shown in fig. 4-A and 4-B respThe result of linearity study shown in table 5-A, and optical characteristics are shown in 5-B.


 

 

Table 5-A: Linearity studies of THIO and IBU

Sample

THIO

IBU

Sr. no.

Concentration (ppm)

Area

Concentration (ppm)

Area

1

0

0

0

0

2

100

109328

400

558882

3

200

218650

800

1087640

4

300

310794

1200

1610268

5

400

422276

1600

2186391

6

500

514384

2000

2633475

7

600

619903

2400

3111865

 

image

Figure 4-A: Linearity Plot of THIO

image

Figure 4-B: Linearity Plot of IBU 

 


 

6.4 Limit of Detection (LOD) and Limit of Quantification (LOQ) parameters: 

From the linearity data, the limit of detection and quantitation are calculated using the formula is as follow; 

  1. From the linearity plot the LOD and LOQ are calculated for IBU:

             LOD = 3.3 × SD / Slope = 3.3 × 5843.029/ 35839 = 0.54

             LOQ = 10 × SD / Slope = 10 × 5843.029/ 35839 = 1.63

  1.  From the linearity plot the LOD and LOQ are calculated for THIO:

             LOD = 3.3 × SD / Slope = 3.3 × 3493.1755749.7 = 2.00

             LOQ = 10 × SD / Slope = 10 × 3493.1755749.7 = 6.08


 

 

Table 5-B: Optical characteristics of THIO and IBU

Sr. No.

Parameter

THIO

IBU

1

Calibration range (ppm)

100-600

400-2400

2

Correlation coefficient (R²)

0.9995

0.9989

3

Slope (m)

1026.2

1302.1

4

Intercept (c)

5749.7

35839

5

Limit of detection (µg/ml)

2.00

0.54

6

Limit of Quantitation (µg/ml)

6.08

1.63

 

 

 


 

6.5 Robustness:

To check robustness, we made alteration in rate of flow and mobile phase composition. 

  1. Effect of alteration in rate of flow:

THIO & IBU was resolved from peaks of all other and there retention times were comparable with peaks obtained for mobile phase having flow rates 1.0 ml/min. The factor of symmetry for THIO & IBU for alteration in rate of flow was within the limits which are reported in table 6-A & 6-B.

  1. Effect of alteration in mobile phase composition:

THIO & IBU was resolved from all other peaks and there retention times were comparable with obtained for mobile phase having composition MeOH: H2O (50:50 v/v). The factor of symmetry for THIO & IBU for alteration in mobile phase composition was within the limits which are reported in table 6-C & 6-D.


 

 

Table 6-A: Data for effect of alteration in rate of flow for THIO

 

 

 

Flow

0.9 ml

Std.   Area

Tailing factor

 

 

 

Flow

1.0 ml

Std.      Area

Tailing factor

 

 

 

Flow

1.1 ml

Std.        Area

Tailing factor

1104842

2.023

989210

2.130

906727

1.974

1107341

2.058

983274

2.086

905476

1.975

1107006

2.041

983699

2.163

906573

1.965

1101161

2.099

990644

2.072

905461

1.988

1103825

2.142

989493

2.010

910654

1.992

Avg.

1104835

 

2.073

Avg.

987264

 

2.092

Avg.

906978

 

1.979

SD

2525.456

SD

3493.175

SD

2138.767

%RSD

0.23

%RSD

0.35

%RSD

0.24

 

Table 6-B: Data for effect of alteration in rate of flow for IBU

 

 

 

Flow

0.9 ml

Std.           Area

Tailing factor

 

 

 

Flow

1.0 ml

Std.      Area

Tailing factor

 

 

 

Flow

1.1 ml

Std.           Area

Tailing                  factor

5503740

1.220

4926593

1.248

4521134

1.263

5511045

1.260

4916621

1.300

4519566

1.262

5505373

1.229

4930215

1.301

4522586

1.263

5489310

1.194

4930645

1.306

4530553

1.290

5498586

1.245

4929355

1.316

4531022

1.276

Avg.

5501611

 

1.230

Avg.

4926686

 

1.294

Avg.

4524972

 

1.271

SD

8187.656

SD

5843.029

SD

5417.521

%RSD

0.15

%RSD

0.12

%RSD

0.12

 

Table 6-C: Data for effect of alteration in mobile phase composition for THIO

 

 

 

MeOH: H2O (40:60)

Std.         Area

Tailing factor

 

 

 

MeOH:  H2O (50:50)

Std. Area

Tailing factor

 

 

 

MeOH: H2O (60:40)

Std. Area

Tailing factor

1290619

2.227

989210

2.130

839408

1.896

1290262

2.182

983274

2.086

840286

1.855

1289891

2.155

983699

2.163

841051

1.872

1292215

2.152

990644

2.072

841117

1.836

1291154

2.138

989493

2.010

841439

1.835

Avg.

1290828

 

2.171

Avg.

987264

 

2.092

Avg.

840660

 

1.859

SD

904.441

SD

3493.175

SD

817.917

%RSD

0.07

%RSD

0.35

%RSD

0.10

 

 

Table 6-D: Data for effect of alteration in mobile phase composition for IBU

 

 

 

MeOH: 

H2O (40:60)

Std. Area

Tailing factor

 

 

 

MeOH: H2O (50:50)

Std. Area

Tailing factor

 

 

 

MeOH: H2O (60:40)

Std. Area

Tailing factor

6406521

1.202

4926593

1.248

4217310

1.286

6403788

1.203

4916621

1.300

4219308

1.268

6404702

1.205

4930215

1.301

4222650

1.294

6407753

1.209

4930645

1.306

4219250

1.295

6407060

1.209

4929355

1.316

4227131

1.289

Avg.

6405965

 

1.206

Avg.

4926686

 

1.294

Avg.

4221130

 

1.286

SD

1661.295

SD

5843.029

SD

3865.517

%RSD

0.03

%RSD

0.12

%RSD

0.09

 


 

6.6 Ruggedness:

To check ruggedness, we made system-system variability as a system 1 to system 2 and study has performed on different HPLC systems for THIO & IBU under same circumstances at different times. Samples of six were made for drugs and each was studies as per method of test. Results of differentiation for both the obtained on 2 dissimilar systems of HPLC, proves that the given method for test assay are robust for variability of system-system for this combination. % RSD was within the limit for the systems. For result of system 1 refer table 4 and result of system 2 are given in table 7.


 

 

Table 7: Data of system to system variability (sample) System-2 for THIO and IBU

Injection:

500 ppm

Concentration

Peak area

of THIO

Average % Assay 

of THIO

Injection:            

2 ppm

Concentration

Peak area of

IBU

Average

% Assay of IBU

1

 

199392

 

101.06

1

965410

 

98.31

200103

964230

2

198897

 

101.71

2

957256

 

98.44

199545

957660

3

199928

 

101.53

3

956764

 

98.85

196060

957645

4

204903

 

100.97

4

974540

 

97.36

202053

973943

5

213950

 

101.27

5

1027003

 

98.01

214199

1030645

6

201204

 

101.84

6

970641

 

98.29

203743

970123

Mean

202831

101.40

Mean

975488

98.21

SD

5729.173

0.353

SD

25759.667

0.484

% RSD

2.82

0.35

% RSD

2.64

0.49

 

 

 

 

 

 

 

 

6.7 Forced Degradation Studies:

Analysis of statistics proved that the given method for THIO and IBU gives result values as per guidelines of ICH. All the stability studies results are shown in table 2 and Fig. 5.

 

Figure 5-A: Chromatograms of Acid degradation

 

Figure 5-B: Chromatograms of Base degradation

 

Figure 5-C: Chromatograms of Peroxide degradation

 

Figure 5-D: Chromatograms of Thermal degradation

 

Figure 5-E: Chromatograms of Photostability at 256 nm

 

Figure 5-F: Chromatograms of Photostability at 228 nm


 

7. CONCLUSION:

In this a novel RP- HPLC (Stability- indicating) method has developed successfully & certified for the analysis of THIO and IBU in tablet dosage first time as stated by guidelines of ICH. This performed method was satisfyingly separated all the two compounds (drug) with degradants, estimate the active contents in forced degradation which is significant part of drug development stage and the pharmaceutical industry has a lots of attraction in this area.

CONFLICT OF INTEREST: 

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

REFERENCES:

1. Jadhav AP, Datar PA, Kedar TR, Kardile DP, Shete RV, Analytical method for determination of Thiocolchicoside in marketed pharmaceutical preparation: A Review, International Journal of Technology, 2019; 9(2): 45-53 https://doi.org/10.5958/2231-3915.2019.00011.7

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