Formation Of Ion-pair Complex Research Articles

Sensitive spectrophotometric determination of vardenafil HCl in pure and dosage forms

The present work aims to develop and validate a simple, rapid, cost-effective, sensitive and extractive spectrophotometric methods for the determination of phosphodiesterase type 5-inhibitor; vardenafil HCl (VARD) in pure and in dosage forms. The developed methods are based on the formation of ion-pair complexes between vardenafil HCl and dyes, namely, bromocresol green (BCG), bromocresol purple (BCP), bromophenol blue (BPB), bromothymol blue (BTB) and eriochrom black T (EBT) in acidic buffer solutions. Different factors affecting the reactions between VARD and the dyes were studied and optimized. The formed complexes were extracted with methylene chloride and measured at 418, 410, 415, 417 and 520nm using BCG, BCP, BPB, BTB and EBT, respectively. The beer's law was obeyed in the ranges 1.0-10, 1.0-16, 0.5-8.0, 2.0-20 and 1.0-14μgmL-1 for BCG, BCP, BPB, BTB and EBT, respectively under the optimum conditions. The composition of the ion-pairs was found 1:1. The molar absorptivity's, Sandell's sensitivity, limits of detection and the limits of quantification were calculated. Other method validation parameters, such as accuracy, intra-day and inter-day precision, robustness, ruggedness and selectivity, have been evaluated. The proposed methods have been applied successfully for the analysis of vardenafil HCl in pure and dosage forms. The reliability of the methods was further ascertained by performing recovery studies using the standard addition method. Statistical comparison of the results with the reported method was performed by applying student's t- and F-tests and no significant statistical differences were obtained.

Spectrophotometric and atomic absorption spectrometric determination of cephalexin and cephradine in dosage forms

This paper describes two simple, sensitive and selective spectrophotometric and atomic absorption spectrometric (AAS) procedures for the determination of two compounds of cephalosporins (Cephalexin monohydrate and Cephradine). These procedures are based on the formation of ion-pair complexes between the drugs and ammonium reineckate. The formed precipitates are quantitatively determined either spectrophotometrically or by AAS procedures. The methods consist of reacting drugs with Reinecke's salt in an acidic medium at a temperature of 25 ± 2°C. The spectrophotometric procedure (procedure I) is based on dissolving the formed precipitate with acetone. The volume was completed quantitatively and absorbance of the solution was measured at 525 nm against blank. Also, the AAS procedures (procedure II) are quantitatively determined directly or indirectly through the chromium precipitate formed or the residual unreacted chromium in the filtrate at 358.6 nm. The optimum conditions for precipitation have been carefully studied. Beer's law is observed for the studied drugs in the ranges 0.1-1.5 mg mL-1 or 5-70 μg mL-1 using spectrophotometric or AAS methods, with correlation coefficients ≥ 0.9965, respectively. Both procedures I and II were accurate and precise when applied to the analysis of the cited cephalosporins in different dosage forms with good recovery percent ranged from 98.90 ± 0.94 to 100.15 ± 0.97 without interference from additives.

Development and validation of spectrophotometric methods for the sensitive and selective determination of lamotrigine in pharmaceuticals using bromocresol purple

Three simple, selective and sensitive methods have been developed and validated for the determination of lamotrigine (LMT) in pure drug and in tablets. The first method (method A) is based on the formation of ion-pair complex between LMT and the dye, bromocresol purple (BCP) at pH 2.40±0.01 which was extracted into dichloromethane (DCM) and the absorbance of yellow ion-pair complex was measured at 410 nm. In the second and third methods (method B and method C), the drug-dye ion-pair was dissolved either in ethanol and the resulting acid form of the dye was measured at 410 nm or in ethanolic potassium hydroxide and the resulting base form of the dye was measured at 600 nm. Under the optimized conditions, Beer's law was obeyed over 2.0-20.0 μg/mL, 150-1500 ng/mL and 50-600 ng/mL for method A, method B and method C, respectively, and the corresponding molar absorptivity values were 1.018×104, 1.43×105 and 4.21×105 L/mol/cm. The Sandell sensitivity values of 0.0252, 0.0018 and 0.0006 μg/cm2 for method A, method B and method C, respectively, and the corresponding values for limits of detection and quantification were also reported for all three methods. The molar ratio of the formed ion-pair complex was found to be 1: 1 as deduced by Job's method for method A, and the calculated stability constant was also reported. Over the linear ranges applicable, the accuracy and precision of the methods were evaluated on intra-day and inter-day basis; the reported mean accuracy values are 99.50±1.09%, 99.99±1.11% and 100.72±0.62% for method A, method B, and method C, respectively; the relative error (RE) was ≤ 2.57% and the relative standard deviation (RSD) was ≤ 2.01%. Application of the proposed methods to bulk powder and commercial pharmaceutical tablets are also presented.

Ion-pair induced solvent extraction of lithium (I) from acidic chloride solutions with tributyl phosphate

Lithium (Li) is an important energy metal in the 21st century. However, the selective recovery of Li is still a big challenge, especially from acidic solutions with multiple metal ions existence. Herein we report a new ion pair induced mechanism for selectively extracting Li+ from acidic chloride solutions by tributyl phosphate (TBP). It is shown that the acidity and the chloride ions in the aqueous phase have great effects on the extraction of Li+. The FT-IR, UV-Vis and ESI-MS experiments provide solid evidence for the formation of ion-pair complex [Li(TBP)n(H2O)m]+[FeCl4]− (n = 1, 2, 3; m = 0, 1) in the organic phase, which brings about the effective and efficient extraction of Li+. This mechanism can overcome the Hofmeister bias and allow for the selective extraction of Li+ from the extremely hydrophilic chlorides. It has also been proved that the loaded Li in TBP can be effectively stripped by concentrated HCl solution with a Li/Fe separation factor > 500. The understanding of the ion-pair transport mechanism is helpful for optimizing the recovery process or further advancing more efficient recovery techniques for Li from acidic liquor.

Micelle-based restricted access ion-pair microextraction of phosphate at trace levels in water samples for separation, preconcentration and determination

Abstract A new and simple micelles-rich restricted access supramolecular solvent-based liquid phase microextraction method (RASUPRASs-LPME) based on the ion-pair complex formation of phosphate (PO4 3-) ions with ammonium heptamolybdate and malachite green in acidic medium was developed. The phosphate ion concentration after microextraction of the ion-pair complex to the hexagonal aggregates of decanoic acid (DA) was measured with micro-volume UV-Vis spectrophotometer at 625 nm. All analytical parameters which are effective on the method such as acid type and concentration, supramolecular solvent volume, amount of the components forming the complex, sample volume, were optimized. The preconcentration factor (PF), limit of detection (LOD) and limit of quantification (LOQ) for the developed method was found to be 15, 9.6 and 32.1, respectively. The RA-SUPRAs-LPME method was finally applied for the analysis of the phosphate content of different types of water samples.

DEVELOPMENT AND VALIDATION OF NEW SPECTROPHOTOMETRIC METHODS FOR ESTIMATION OF ANTIPSYCHOTIC DRUG ASENAPINE MALEATE IN PURE AND DOSAGE FORMS

Objective: Three sensitive, simple, precise, reproducible, and validated spectrophotometric methods have been developed for the determination of anti-psychotic drug (asenapine maleate) in pure and pharmaceutical dosage forms.
 Methods: The methods are based on the formation of yellow-colored ion-pair complex between asenapine maleate and three acid dyes, namely, bromocresol purple (BCP), bromophenol blue (BPB) and bromothymol blue (BTB) with absorption maxima at 410, 414 and 416 nm, respectively. Several parameters such as pH, buffer type and volume, reagent volume, the sequence of addition and effect of extracting solvent were optimized.
 Results: Under the optimum experimental conditions, beer’s law is obeyed over the concentration ranges of 1.0–20, 1.0–14, and 1.0-16 μg/ml for BCP, BPB and BTB, respectively, with good correlation coefficients (0.9994-0.9998). The apparent molar absorptivity and Sandell’s sensitivity values are reported for all methods. The limit of detection (LOD) and the limit of quantification (LOQ) values are found to be 0.27, 0.30, and 0.25 μg/ml and 0.90, 1.0, and 0.83 μg/ml for BCP, BPB and BTB, respectively. The stoichiometric ratio of the formed ion-pair complexes was found to be 1:1 (drug: reagent) for all methods, as deduced by Job's method of continuous variation.
 Conclusion: The proposed methods were successfully applied for the determination of asenapine maleate in pharmaceutical formulations with good accuracy and precision. Statistical comparison of the results was performed using Student's t-test and variance ratio F-test at the 95% confidence level and there was no significant difference between the reported and proposed methods regarding accuracy and precision. Further, the validity of the proposed methods was confirmed by recovery studies via standard addition technique in accordance with ICH guidelines.

Spectrophotometric Determination of Isopropamide Iodide based on Ion-pair Complex Formation with Thymol Blue

A simple, accurate, affordable, and rapid spectrophotometric approach has been established for the quantification of the medicinal compound of Isopropamide iodide (ISO) in pharmaceutical preparations. An ion-pair complex which absorbs at 404nm has formed the reaction of the drug and the coloring reagent of Thymol blue (TB) at an acidic medium of pH=4. The calibration curve showed excellent linearity over a quantification range of (1-40 ?g/ml) with an excellent coefficient of correlation (= 0.9993). The examined limit of detection (LOD) was (0.3 ?g/ml) for repeatability of (n= 3). The approach witness no interference of the commonly used excipients in such pharmaceutical formulation that contains Isopropamide iodide. Validation of the method was accomplished by calculating the relative standard deviation (RSD %) and found to be in the range of (1.1938-0.5954). While recovery percentage for (n=3) was (97.4 – 101.4%). The analytical parameters of the method were optimized and were efficaciously applied to the Isopropamide iodide determination in pure form and in the mixture of a tablet form. The approach can be functional for determining other active pharmaceuticals.

Reactions of Rare‐Earth Metal Based Lewis Pairs with Azides†

Summary of main observation and conclusionThe reactivity of homoleptic rare‐earth metal aryloxide based Lewis pairs toward organic azide substrates has been investigated herein. Treatment of RE(OAr)3 (RE = La, Sm, Y, and Sc, Ar = 2,6‐tBu2‐C6H3), PEt3 and Me3SiN3 in 2 : 1 : 1 molar ratio resulted in formation of separated ion pair complexes [Me3Si‐PEt3]+[(ArO)3RE‐N=N=N‐RE(OAr)3]– under mild conditions. Replacement of phosphine with the nitrogen‐containing Lewis base 1,4‐diazabicyclo[2.2.2]octane (DABCO) produced analogous rare‐earth azide complexes with [Me3Si‐DABCO]+ counterions. In contrast, reaction of the La(OAr)3/PEt3 Lewis pair with 1‐adamantyl azide (AdN3) afforded the typical frustrated Lewis pair‐type 1,1‐addition product. A tetrahydrofuran ring‐opening reaction was also observed for the resulting rare‐earth azide complex with the [Me3Si‐PEt3]+ cation, with cleavage of the C—O bond by Si/P cooperation.

Title DEVELOPMENT AND VALIDATION OF SPECTROPHOTOMETRIC METHODS FOR DETERMINATION OF LEUKOTRIENE RECEPTOR ANTAGONIST MONTELUKAST SODIUM IN BULK AND PHARMACEUTICAL FORMULATIONS

Objective: Simple, sensitive, precise, reproducible, and validated visible spectrophotometric methods have been developed for the determination of leukotriene receptor antagonist drug, namely, montelukast (MNT) sodium in bulk and pharmaceutical preparations.
 Methods: Three spectrophotometric methods are based on the formation of yellow-colored ion-pair complexes between MNT sodium and three dyes, bromocresol green, bromophenol blue, and methyl orange with absorption maxima at 420, 416, and 426 nm, respectively.
 Results: The stoichiometric ratio of the formed ion-pair complexes was found to be 1:1 (drug:reagent) for all methods, as deduced by Job’s method of continuous variation. Several parameters such as pH, buffer type and volume, reagent volume, sequence of addition, and effect of extracting solvent were optimized to achieve high sensitivity, stability, low blank reading, and reproducible results. Under the optimum conditions, linear relationships with good correlation coefficients (0.9993–0.9999) were found over the concentration ranges of 1.0–10, 1.0–12, and 1.0–16 μg/mL with a limit of detection of 0.30, 0.29, and 0.27 μg/mL for bromocresol green, bromophenol blue, and methyl orange methods, respectively.
 Conclusion: The proposed methods were validated in accordance with ICH guidelines and successfully applied to the analysis of MNT sodium in pharmaceutical formulations. Statistical comparison of the results obtained by applying the proposed methods with those of the reference method revealed good agreement and proved that there was no significant difference in the accuracy and precision between the results.

Spectrophotometric Methods for Determination of Sunitinib in Pharmaceutical Dosage Forms Based on Ion-pair Complex Formation.

Three rapid spectrophotometric methods were developed for the determination of sunitinib based on the formation of ion-pair complex in acidic medium with bromocresol purple, bromothymol blue, and bromophenol blue. The formed ion-pair complexes, extractable with chloroform, were measured at 422 nm for bromocresol purple, 425 nm for bromothymol blue and 427 nm for bromophenol blue. All these methods were optimized for the pH of buffer and the volume of the reagent. The methods were linear over the range of 1-200 µg/mL for bromocresol purple, 1-150 µg/mL for bromothymol blue, and 2-200 µg/mL for bromophenol blue with a very low limit of quantification and acceptable accuracy and precision. Using the proposed methods for determination of sunitinib in pharmaceutical dosage forms showed reliable results comparable to previously published method.

Capture and displacement-based release of the bicarbonate anion by calix[4]pyrroles with small rigid straps.

Two-phenoxy walled calix[4]pyrroles 1 and 2 strapped with small rigid linkers containing pyridine and benzene, respectively, have been synthesized. 1H NMR spectroscopic analyses carried out in CDCl3 revealed that both of receptors 1 and 2 recognize only F− and HCO3− among various test anions with high preference for HCO3− (as the tetraethylammonium, TEA+ salt) relative to F− (as the TBA+ salt). The bound HCO3− anion was completely released out of the receptors upon the addition of F− (as the tetrabutylammonium, TBA+ salt) as a result of significantly enhanced affinities and selectivities of the receptors for F− once converted to the TEAHCO3 complexes. Consequently, relatively stable TEAF complexes of receptors 1 and 2 were formed via anion metathesis occurring within the receptor cavities. By contrast, the direct addition of TEAF to receptors 1 and 2 produces different complexation products initially, although eventually the same TEAF complexes are produced as via sequential TEAHCO3 and TBAF addition. These findings are rationalized in terms of the formation of different ion pair complexes involving interactions both inside and outside of the core receptor framework.

Determination of Atenolol in Tablet Formulation by Analytical Spectrophotometry

Simple and rapid spectrophotometric method has been developed for the determination of Atenolol in bulk and tables formulation. The method is based on the formation of yellow ion-pair complex between Atenolol and Bromocresol green in 1, 2-dichloroethane medium. The maximum absorption of the complex was found to be 414nm. Different parameters affecting the reaction were optimized such as: effect of solvents, time, reagent concentration, correlation ratio, etc. The formed complex was quantified spectrophotometrically at maximum absorption. Linearity range was 2.66–26.63μg/mL. Regression analysis showed a good correlation coefficient R2 = 0.9999. The limit of detection (LOD) and limit of quantification (LOQ) were to be 0.22μg/mL and 0.66 μg/mL. The average percent recovery was found to be (97.23–101.53)% for Atenolol. The method was successfully applied for the determination of Atenolol in pharmaceutical tablets formulation in six Syrian pharmaceutical trademarks: (Tenormin MPI 100, Tenormin MPI 50, Hypoten UNIPHARMA 100, Hypoten UNIPHARMA 50, Normoten BARAKAT 100 and Normoten BARAKAT 50). The proposed method is simple, direct, sensitive and do not require any extraction process. Thus, this method could be readily applicable for the quality control and routine analysis.

The Improved Cargo Loading and Physical Stability of Ibuprofen Orodispersible Film: Molecular Mechanism of Ion-Pair Complexes on Drug-Polymer Miscibility

High drug cargo loading in polymer and physical stability was essential for the development of orodispersible films (ODFs) because of the small amount of excipients used in a thin film. The present study aimed to investigate the mechanism of ion-pair strategy in improving drug cargo loading and physical stability of drug in ODFs. The results showed that the ion pair, especially ibuprofen-ethanolamine, improved the drug solubility in polymer up to 60% (w/w) and physical stability by 30% than the pure ibuprofen film. In addition, drug dissolution rate was increased over 2 times. The high drug cargo loading, physical stability and drug dissolution rate was derived from the improved the drug-polymer miscibility introduced by the formation of ion-pair complex. Investigations from the standpoint of physicochemical properties, intermolecular interaction, and polymer mobility indicated the modulation mechanism of ion-pair complexes in the ODFs at molecular level. The amino group and −OH of counter ion exhibited strong hydrogen bond forming ability, which increased the bilateral interaction with both drug and polymer, delayed the onset temperature of sublimation and decreased the polymer mobility. Therefore, ion-pair technology is a promising strategy for high drug loading ODFs in improving the drug-excipient miscibility and stability.

SPECTROPHOTOMETRIC DETERMINATION OF ATORVASTATIN CALCIUM AND PITAVASTATIN CALCIUM THROUGH ION-PAIR COMPLEX FORMATION USING ACID DYES IN PHARMACEUTICAL FORMULATIONS AND HUMAN URINE SAMPLES

Objective: The main objective was to develop simple, cost-effective, rapid and selective spectrophotometric methods for the determination of atorvastatin calcium and pitavastatin calcium in pure and pharmaceutical formulations using acid dyes like bromothymol blue, bromocresol purple and bromocresol green and also in human urine samples.
 Methods: The developed methods were based on the formation of ion-pair complexes between statin drugs and acid dyes after studying the optimization conditions. The association constants of the developed ion-pair complexes were evaluated using Benesi–Hildebrand equation. The methods were validated according to ICH guidelines.
 Results: The formed ion-pair complexes showed maximum absorbance which was measured at 637 nm for both methods A and D, 601 nm, 606 nm for methods B and E and 631 nm for both methods C and F respectively with correlation coefficients 0.999. The analytical parameters and their effects in the developed methods were investigated. The ion-pair complexes were stable up to 24 h and showed good linearity. The molar absorptivity, Sandell sensitivity, detection, and quantification limits were also calculated. The stoichiometry ratio in all the cases was 1:2 by using Job’s method of continuous variation. The recovery studies again showed good results because co-formulated substances did not interfere for the determination of ATC and PTC in the developed methods.
 Conclusion: The developed methods were applicable for routine quality control analysis of ATC and PTC in pure and pharmaceutical dosage forms. Good results were obtained when the developed methods were applied in healthy human urine samples.

Extractive Spectrophotometric Method for the Determination of Glibenclamide by Ion-Pair Complex in Pure Form and Pharmaceutical Formulation

Simple, rapid and sensitive extractive spectrophotometric method is presented for the determination of glibenclamide (Glb) based on the formation of ion-pair complex between the Glb and anionic dye, methyl orange (MO) at pH 4. The yellow colored complex formed was quantitatively extracted into dichloromethane and measured at 426 nm. The colored product obeyed Beer’s law in the concentration range of (0.5-40) μg.ml-1. The value of molar absorptivity obtained from Beer’s data was found to be 31122 L.mol-1.cm-1, Sandell’s sensitivity value was calculated to be 0.0159 μg.cm-2, while the limits of detection (LOD) and quantification (LOQ) were found to be 0.1086 and 0.3292 μg.ml-1, respectively. The stoichiometry of the complex created between the Glb and MO was 1:1 as determined via Job’s method of continuous variation and mole ratio method. The method was successfully applied for the analysis of pharmaceutical formulation.

Spectrofluorimetric method for determination of bupropion in pharmaceutical dosage forms

Bupropion is a noradrenaline and dopamine reuptake inhibitor which is used as an antidepressant drug. Few HPLC and spectrophotometric methods have been reported before for the determination of bupropion. Most of the previous methods reported for determination of bupropion in pharmaceutical dosage forms are somehow dangerous to health and environment because of using organic solvents. In the present method bupropion was determined in pharmaceutical dosage forms by spectrofluorimetry after ion-pair complex formation with eosin Y. The ion-pair complex formation was optimized for reagent amount, buffer pH and time. The developed method was linear over the range of 3-120μgmL-1 with an acceptable precision (CV<1.5%) and accuracy (Error<1%). The present method is applicable for determination of bupropion in pharmaceutical dosage forms for routine quality control analysis.

Spectrophotometric Determination of Cinnarizine and Domperidone Maleate in Pharmaceutical Preparations by Ion Pair Complex Formation with Rose Bengal Dye

A simple, rapid and sensitive spectrophotometric method has been developed for the determination of cinnarizine (CIN) and domperidone maleate (DOM) in bulk and pharmaceutical formulations. The method is based on the formation of ion-pair complexes between the studied drugs and rose Bengal dye in buffer solution (pH5). The complexes give maximum absorbance at 571 nm. The method obeys Beer’s law in the range of 0.5-34 and 0.5-36 µg ml-1 with molar absorptivity of 2.55×104 and 2.42×104 l.mol-1.cm-1 for CIN and DOM respectively. The method has been successfully applied for the determination of studied drugs on pharmaceutical dosages with no interferences. The results have been compared with official method and standard procedure with a good agreement.

A novel composite of layered double hydroxide/geopolymer for co-immobilization of Cs+ and SeO42− from aqueous solution

Geopolymers are always considered as promising materials for the treatment of radioactive wastes. In order to extend the application of geopolymer to the immobilization of anionic species, a novel composite of layered double hydroxide/geopolymer (LDH/GEO) was synthesized and applied for cosorption of Cs+ and SeO42−. The ability of LDH/GEO to sorb Cs+ was maintained as that of pure GEO, even though the surface of geopolymer was homogeneously covered by the LDH platelets. The sorption of Cs+ onto LDH/GEO composite occurred via ion exchange, which was controlled by particle diffusion. It is different with Cs+ sorption onto pure GEO governed by film diffusion. Therefore, “Pocket diffusion” was proposed for the particle diffusion as the case of LDH/GEO because this kind of diffusion would be restricted in a certain distance around the ring entrance gate due to the amorphous essence of GEO. For SeO42− sorption by LDH/GEO, ion-exchange with the interlayer NO3− and surface sorption could be the main mechanisms. Importantly, the sorption speed of SeO42− achieved by LDH/GEO composite was much faster than that by pure LDH. In the binary system (Cs++ SeO42−), the sorption of Cs+ was slightly suppressed compared to the single system, which might be due to the formation of ion-pair complex of [CsSeO4]−. However, it did not have negative effect on the SeO42− sorption. In the presence of other cations or anions, the cosorption performances of Cs+ and SeO42− were satisfactorily obtained. Furthermore, the Cs+ and SeO42- sorption densities were superior to the previously reported values. The combined MgAl-LDH/geopolymer composite could be a promising material for the immobilization of Cs+ and SeO42−, and this work would provide guidance for the development of geopolymer-based materials for environmental applications.

Spectrophotometric Determination of Ciprofloxacin by Ion-pair complex Formation with Bromothymol Blue

تهدف الدراسة الى تقدير (CPF) على هيئة مسحوق نقي و هيئة اقراص سوري و اماراتي ) بطريقة طيفية بسيطة تعتمد على تكوين معقد من نوع مزدوج ايوني باستعمال (BTB) ككاشف للمعقد الايوني . ان المعقد الايوني المتكون شديد اللون و سهل الاستخلاص باستعمال الكلورفورم عند (pH3.0) و يتم تقديره طيفيا عند طول موجي (421 nm) . و قد لوحظ ان الطريقة المقترحة طبقت بنجاح لتقدير (CPF) على هيئة اقراص و كانت النتائج جيدة , كذلك لوحظ انه لا يوجد اي تداخلات من قبل الاضافات غير الفعالة

Utility of a green fluorone-based turn-off fluorescence probe for submicromolar determination and stability testing of two macrolides. Insights into reaction thermodynamics, quenching mechanism, and identification of the oxidative degradation products by ESI+-MS

A smart, sensitive, and green turn-off fluorescence probe was developed and validated for the determination of two macrolides; spiramycin (SPM) and josamycin (JSM) at submicromolar concentration levels. The probe is based on the fluorone-based dye, eosin Y that efficiently interacts with the two compounds through ground-state ion-pair complex formation with quenching of its native fluorescence (λex/λem of 524/548 nm). The Stern-Volmer relationship confirmed the static fluorescence quenching mechanism. Furthermore, the thermodynamic parameters of the reaction were explored via the van't Hoff plot. The values of the fluorescence quenching were linearly correlated to the drug concentration over the ranges of 0.12–5.93 and 0.30–9.66 μM (0.1–5.0 and 0.25–8.0 μg/mL) for SPM and JSM, respectively. Therefore, the probe was utilized for quality control of the two compounds in their tablets with mean %recoveries of 98.12 ± 1.72 and 97.22 ± 1.51% for SPM and JSM, respectively. Statistical analysis of the results by t- and F-tests showed excellent agreement with the results of the comparison methods. Moreover, the developed probe was applied for stability testing of the two compounds under oxidative condition along with ESI+-MS identification of the potential degradants. Besides, the greenness of the developed probe was ensured by different assessment metrics. Hence, the developed method is the first stability-indicating fluorimetric assay for the two compounds, and its chief merits include effortlessness, rapidness, sensitivity, cheapness and harmony with the green chemistry rules.