1
|
Identification and Characterization of a New Process Related Impurity in Terbutaline Sulfate by Accurate-Mass Q-TOF LC/MS/MS and NMR. Chromatographia 2021. [DOI: 10.1007/s10337-021-04021-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
2
|
Abo El Abass Mohamed S, El-Awady MI. Spectrofluorimetric investigation with green analytical procedures for estimation of bambuterol and terbutaline: Application to pharmaceutical dosage forms and content uniformity testing. LUMINESCENCE 2018; 34:70-76. [DOI: 10.1002/bio.3578] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 10/12/2018] [Accepted: 10/17/2018] [Indexed: 01/24/2023]
Affiliation(s)
- Samah Abo El Abass Mohamed
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Mansoura University; Mansoura Egypt
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy; Delta University for Science and Technology; International Coastal Road Gamasa Egypt
| | - Mohamed I. El-Awady
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Mansoura University; Mansoura Egypt
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy; Delta University for Science and Technology; International Coastal Road Gamasa Egypt
| |
Collapse
|
3
|
Gopal P, Reddy TM. Fabrication of carbon-based nanomaterial composite electrochemical sensor for the monitoring of terbutaline in pharmaceutical formulations. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.11.059] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
|
4
|
Zhou N, Qian Q, Qi P, Zhao J, Wang C, Wang Q. Identification of Degradation Products and Process Impurities from Terbutaline Sulfate by UHPLC-Q-TOF-MS/MS and In Silico Toxicity Prediction. Chromatographia 2017. [DOI: 10.1007/s10337-017-3259-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
5
|
Kalambate PK, Rawool CR, Srivastava AK. Fabrication of graphene nanosheet–multiwalled carbon nanotube–polyaniline modified carbon paste electrode for the simultaneous electrochemical determination of terbutaline sulphate and guaifenesin. NEW J CHEM 2017. [DOI: 10.1039/c7nj00101k] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A sensitive electrochemical method is developed for the simultaneous determination of terbutaline sulphate (TBS) and guaifenesin (GF) at a carbon paste electrode modified with graphene nanosheet–multiwalled carbon nanotube–polyaniline composite (GNS–MWCNT–PANI).
Collapse
|
6
|
Felix FS, Daniel D, Matos JR, Lucio do Lago C, Angnes L. Fast analysis of terbutaline in pharmaceuticals using multi-walled nanotubes modified electrodes from recordable compact disc. Anal Chim Acta 2016; 928:32-38. [DOI: 10.1016/j.aca.2016.04.045] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 04/21/2016] [Accepted: 04/22/2016] [Indexed: 11/26/2022]
|
7
|
Bi S, Zhao T, Wang Y, Zhou H, Pang B, Gu T. Binding studies of terbutaline sulfate to calf thymus DNA using multispectroscopic and molecular docking techniques. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 150:921-927. [PMID: 26123508 DOI: 10.1016/j.saa.2015.06.042] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 06/09/2015] [Accepted: 06/15/2015] [Indexed: 06/04/2023]
Abstract
The interaction of terbutaline sulfate (TS) with calf thymus DNA (ctDNA) were investigated by fluorescence quenching, UV-vis absorption, viscosity measurements, ionic strength effect, DNA melting experiments and molecular docking. The binding constants (Ka) of TS to ctDNA were determined as 4.92×10(4), 1.26×10(4) and 1.16×10(4) L mol(-1) at 17, 27 and 37 °C, respectively. Stern-Volmer plots suggested that the quenching of fluorescence of TS by ctDNA was a static quenching. The absorption spectra of TS with ctDNA revealed a slight blue shift and hyperchromic effect. The relative viscosity ctDNA was hardly changed by TS, and melting temperature varied slightly. For the system of TS-ctDNA, the intensity of fluorescence decreased with the increase of ionic strength. Also, the Ka for TS-double stranded DNA (dsDNA) was clearly weaker than that for TS-single stranded DNA (ssDNA). All these results revealed that the binding mode of TS with ctDNA should be groove binding. The enthalpy change and entropy change suggested that van der Waals force or hydrogen bonds was a main binding force between TS and ctDNA. Furthermore, the quantum yield of TS was measured by comparing with the standard solution. Based on the Förster energy transference theory (FRET), the binding distance between the acceptor and donor was calculated. Molecular docking showed that TS was a minor groove binder of ctDNA and preferentially bound to A-T rich regions.
Collapse
Affiliation(s)
- Shuyun Bi
- College of Chemistry, Changchun Normal University, Changchun 130032, China.
| | - Tingting Zhao
- College of Chemistry, Changchun Normal University, Changchun 130032, China
| | - Yu Wang
- College of Chemistry, Changchun Normal University, Changchun 130032, China
| | - Huifeng Zhou
- College of Chemistry, Changchun Normal University, Changchun 130032, China
| | - Bo Pang
- Technology Center of Inspection and Quarantine, Jilin Entry-Exit Inspection and Quarantine Bureau, Changchun 130062, China
| | - Tingting Gu
- Technology Center of Inspection and Quarantine, Jilin Entry-Exit Inspection and Quarantine Bureau, Changchun 130062, China
| |
Collapse
|
8
|
Lakshmi Narasimha Rao K, Krishnaiah C, Sudheer Babu K, Padmaja Reddy K. Development and validation of a stability-indicating LC method for simultaneous determination of related compounds of guaifenesin, terbutaline sulfate and ambroxol HCl in cough syrup formulation. JOURNAL OF SAUDI CHEMICAL SOCIETY 2014. [DOI: 10.1016/j.jscs.2012.01.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
9
|
El-Zaher AA, Fouad MA, Elkady EF. Synthesis and Characterization of Maillard Reaction Products of Salbutamol and Terbutaline with Lactose and Development and Validation of an LC Method for the Determination of Salbutamol and Terbutaline in the Presence of These Impurities. ANALYTICAL CHEMISTRY INSIGHTS 2014; 9:1-7. [PMID: 24634579 PMCID: PMC3948716 DOI: 10.4137/aci.s13835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Revised: 01/19/2014] [Accepted: 01/29/2014] [Indexed: 12/05/2022]
Abstract
Being secondary amines, both salbutamol (SLB) and terbutaline (TRB) react by Maillard reaction (MR) with lactose, which is added as an inactive ingredient in tablets. The Amadori rearrangement products were synthesized, isolated, and characterized by mass spectrometry. In addition, a simple, selective, and precise reversed-phase liquid chromatography (LC) method was developed and validated for the determination of SLB and TRB in tablets, each in the presence of its MR impurity. The chromatographic separation was performed on a Symmetry® Waters C18 column (150 mm × 4.6 mm, 5 μm) using a mobile phase consisting of 0.5% aqueous phosphoric acid to acetonitrile (90:10, v/v) at a flow rate of 0.7 mL minute−1. Quantitation was achieved using UV detection at 230 nm. Linearity, accuracy, and precision were found to be acceptable for the determination of SLB and TRB in the concentration range of 0.2–60 and 0.5–80 μg mL−1, respectively. The proposed method was successfully applied to the determination of SLB and TRB in bulk and in their tablets.
Collapse
Affiliation(s)
- Asmaa A El-Zaher
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Marwa A Fouad
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Ehab F Elkady
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| |
Collapse
|
10
|
Kumar A, Nanda S. A validated high performance liquid chromatographic method for estimation of bromhexine and terbutaline in bulk and tablet dosage forms. Pharm Methods 2013; 2:218-22. [PMID: 23781460 PMCID: PMC3658080 DOI: 10.4103/2229-4708.93389] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Introduction: Bromhexine (BH) is a mucolytic agent used in the treatment of respiratory disorders marketed in combination with terbutaline (TB), a β2-adrenergic receptor agonist used as a fast-acting bronchodilator. Materials and Methods: BH and TB were estimated at 270 nm by using ODS C8 column (length 250 mm and internal diameter 4.6 mm) as a stationary phase and a premix of phosphate buffer (0.05 M, pH 3): Acetonitrile (70:30 v/v) as a mobile phase. The total run time of this method was less than 20 min and the retention time for BH was found to be at 15.50 min while that of TB was 9.85 min at a flow rate of 1.0 ml/min, respectively. Results: Percentage label claim of tablet formulation using this method was found to be 99.35% for BH and 99.70% for TB, respectively. The standard deviation was found to be 0.225–0.351 for BH and 0.0.236–0.264 for TB for two different batches of tablet formulation. Conclusion: The results of analysis of two drugs from their tablet formulation using a developed method were found close to 100%. The low values of standard deviation indicate accuracy and reproducibility of the method. Thus developed methods can be used for the routine analysis of two drugs from a combined dosage form.
Collapse
Affiliation(s)
- Amit Kumar
- Department of Pharmaceutical Sciences, NIMS University, Jaipur, Rajasthan, India
| | | |
Collapse
|
11
|
Li Y, Ye Z, Zhou J, Liu J, Song G, Zhang K, Ye B. A new voltammetric sensor based on poly(L-arginine)/graphene–Nafion composite film modified electrode for sensitive determination of Terbutaline sulfate. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2012.09.045] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
12
|
Porel A, Haty S, Kundu A. Stability-indicating HPLC Method for Simultaneous Determination of Terbutaline Sulphate, Bromhexine Hydrochloride and Guaifenesin. Indian J Pharm Sci 2012; 73:46-56. [PMID: 22131621 PMCID: PMC3224409 DOI: 10.4103/0250-474x.89756] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2010] [Revised: 02/22/2011] [Accepted: 02/25/2011] [Indexed: 11/04/2022] Open
Abstract
The aim of the present study was the development and subsequent validation of a simple, precise and stability-indicating reversed phase HPLC method for the simultaneous determination of guaifenesin, terbutaline sulphate and bromhexine hydrochloride in the presence of their potential impurities in a single run. The photolytic as well as hydrolytic impurities were detected as 3,5-dihydroxybenzoic acid, 3,5-dihydroxybenzaldehyde, 1-(3,5-dihydroxyphenyl)-2-[(1,1-dimethylethyl) amino]-ethanone from terbutaline, 2-methoxyphenol and an unknown impurity identified as (2RS)-3-(2-hydroxyphenoxy)-propane-1,2-diol from guaifenesin. The chromatographic separation of all the three active components and their impurities was achieved on Wakosil II column, using phosphate buffer (pH 3.0) and acetonitrile as mobile phase which was delivered initially in the ratio of 80:20 (v/v) for 18 min, then changed to 60:40 (v/v) for next 12 min, and finally equilibrated back to 80:20 (v/v) for 10 min. Other HPLC parameters were: Flow rate at 1.0 ml/min, detection wavelengths 248 and 280 nm, injection volume 10 μl. The calibration graphs plotted with five concentrations of each component were linear with a regression coefficient R(2) >0.9999. The limit of detection and limit of quantitation were estimated for all the five impurities. The established method was then validated for linearity, precision, accuracy, and specificity and demonstrated to be applicable to the determination of the active ingredients in commercial and model cough syrup. No interference from the formulation excipients was observed. These results suggest that this LC method can be used for the determination of multiple active ingredients and their impurities in a cough and cold syrup.
Collapse
Affiliation(s)
- A Porel
- East India Pharmaceutical Works Ltd., Quality Control Department, 119, Biren Roy Road (W), Kolkata - 700 0061, India
| | | | | |
Collapse
|
13
|
Rezazadeh M, Yamini Y, Seidi S. Electrically assisted liquid-phase microextraction for determination of β2-receptor agonist drugs in wastewater. J Sep Sci 2012; 35:571-9. [DOI: 10.1002/jssc.201100869] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
14
|
Al-Akayleh F, Al Remawi M, Rashid I, Badwan A. Formulation andIn vitroassessment of sustained release terbutaline sulfate tablet made from binary hydrophilic polymer mixtures. Pharm Dev Technol 2011; 18:1204-12. [DOI: 10.3109/10837450.2011.620968] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
15
|
Faiyazuddin M, Rauf A, Ahmad N, Ahmad S, Iqbal Z, Talegaonkar S, Bhatnagar A, Khar RK, Ahmad FJ. A validated HPTLC method for determination of terbutaline sulfate in biological samples: Application to pharmacokinetic study. Saudi Pharm J 2011; 19:185-91. [PMID: 23960758 DOI: 10.1016/j.jsps.2011.03.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2010] [Accepted: 03/11/2011] [Indexed: 11/16/2022] Open
Abstract
Terbutaline sulfate (TBS) was assayed in biological samples by validated HPTLC method. Densitometric analysis of TBS was carried out at 366 nm on precoated TLC aluminum plates with silica gel 60F254 as a stationary phase and chloroform-methanol (9.0:1.0, v/v) as a mobile phase. TBS was well resolved at RF 0.34 ± 0.02. In all matrices, the calibration curve appeared linear (r (2) ⩾ 0.9943) in the tested range of 100-1000 ng spot(-1) with a limit of quantification of 18.35 ng spot(-1). Drug recovery from biological fluids averaged ⩾95.92%. In both matrices, rapid degradation of drug favored and the T 0.5 of drug ranged from 9.92 to 12.41 h at 4 °C and from 6.31 to 9.13 h at 20 °C. Frozen at -20 °C, this drug was stable for at least 2 months (without losses >10%). The maximum plasma concentration (Cpmax) was found to be 5875.03 ± 114 ng mL(-1), which is significantly higher than the maximum saliva concentration (Csmax, 1501.69 ± 96 ng mL(-1)). Therefore, the validated method could be used to carry out pharmacokinetic studies of the TBS from novel drug delivery systems.
Collapse
Affiliation(s)
- Md Faiyazuddin
- Formulation Research Laboratory, Department of Pharmaceutics, Faculty of Pharmacy, Hamdard University, Hamdard Nagar, New Delhi 110 062, India ; Faculty of Pharmacy, Integral University, Dasauli, Kursi Road, Lucknow 222 026, Uttar Pradesh, India
| | | | | | | | | | | | | | | | | |
Collapse
|
16
|
FAIYAZUDDIN M, AHMAD S, IQBAL Z, TALEGAONKAR S, AHMAD FJ, BHATNAGAR A, KHAR RK. Stability Indicating HPTLC Method for Determination of Terbutaline Sulfate in Bulk and from Submicronized Dry Powder Inhalers. ANAL SCI 2010; 26:467-72. [PMID: 20410570 DOI: 10.2116/analsci.26.467] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Md. FAIYAZUDDIN
- Department of Pharmaceutics, Faculty of Pharmacy, Hamdard University (Jamia Hamdard)
| | - Sayeed AHMAD
- Department of Pharmacognosy & Phytochemistry, Faculty of Pharmacy, Hamdard University (Jamia Hamdard)
| | - Zeenat IQBAL
- Department of Pharmaceutics, Faculty of Pharmacy, Hamdard University (Jamia Hamdard)
| | - Sushma TALEGAONKAR
- Department of Pharmaceutics, Faculty of Pharmacy, Hamdard University (Jamia Hamdard)
| | - Farhan Jalees AHMAD
- Department of Pharmaceutics, Faculty of Pharmacy, Hamdard University (Jamia Hamdard)
| | - Aseem BHATNAGAR
- Department of Nuclear Medicine, Institute of Nuclear Medicine & Allied Sciences (INMAS)
| | - Roop Krishen KHAR
- Department of Pharmaceutics, Faculty of Pharmacy, Hamdard University (Jamia Hamdard)
| |
Collapse
|
17
|
Li S, Wang J, Zhao S. Determination of terbutaline sulfate by capillary electrophoresis with chemiluminescence detection. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:155-8. [DOI: 10.1016/j.jchromb.2008.11.042] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2008] [Revised: 11/18/2008] [Accepted: 11/30/2008] [Indexed: 10/21/2022]
|
18
|
Basniwal PK, Srivastava PK, Jain SK, Jain D. RP-LC Analysis and Hydrolytic Degradation Profile of Racecadotril. Chromatographia 2008. [DOI: 10.1365/s10337-008-0734-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
19
|
Beltagi AM, El-Desoky HS, Ghoneim MM. Quantification of Terbutaline in Pharmaceutical Formulation and Human Serum by Adsorptive Stripping Voltammetry at a Glassy Carbon Electrode. Chem Pharm Bull (Tokyo) 2007; 55:1018-23. [PMID: 17603193 DOI: 10.1248/cpb.55.1018] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The electrochemical oxidative behavior of terbutaline at the glassy carbon electrode was studied in a series of the Britton-Robinson buffer of pH 2--11. Cyclic and square-wave voltammograms of terbutaline at the pH values </=9 exhibited a single irreversible anodic peak. A fully validated, simple, sensitive and precise square-wave adsorptive anodic stripping voltammetric procedure was described for the determination of terbutaline in bulk form, tablets and human serum. For 5x10(-8) M bulk terbutaline a mean recovery of 98.78+/-0.94% (n=5) was achieved following its preconcentration by adsorptive accumulation onto the glassy carbon electrode at a +0.15 V (vs. Ag/AgCl/KCl(s)) for 180 s. Limit of detection of 6x10(-9) M and limit of quantitation of 2x10(-8) M terbutaline were achieved in the bulk form or its formulations (Bricanyl tablets). The described square-wave adsorption anodic stripping voltammetric procedure was successfully applied for the determination of terbutaline in human serum following medium exchange. Limit of detection of 1.41x10(-8) M (3.173 ng ml(-1)) and limit of quantitation of 4.70x10(-8) M (10.575 ng ml(-1)) were achieved in human serum with a mean recovery of 98.11+/-1.13%.
Collapse
Affiliation(s)
- Amr Mohamed Beltagi
- Chemistry & Physics Department, Faculty of Education, Kafr El-Sheikh University, Kafr El-Sheikh, Egypt.
| | | | | |
Collapse
|
20
|
Yamini Y, Reimann CT, Vatanara A, Jönsson JA. Extraction and preconcentration of salbutamol and terbutaline from aqueous samples using hollow fiber supported liquid membrane containing anionic carrier. J Chromatogr A 2006; 1124:57-67. [PMID: 16716341 DOI: 10.1016/j.chroma.2006.05.001] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2006] [Revised: 04/29/2006] [Accepted: 05/01/2006] [Indexed: 11/26/2022]
Abstract
This paper presents a new three-phase liquid-phase microextraction (LPME) strategy for extraction and preconcentration of salbutamol (SB) and terbutaline (TB) from aqueous samples, including urine. The drugs were extracted from 11 ml of aqueous sample (source phase; SP) into an organic phase with microliter volume located inside the pores of a polypropylene hollow fiber, and then back-extracted into 24 microl of a second aqueous solution as the receiving phase (RP), located in the lumen of the hollow fiber. In preliminary experiments, we tried to transport the drugs using a pH gradient between the two sides of the hollow fiber. Due to the existence of both amine and phenolic groups on the drugs, very little transport occurred and enrichment factors (EF) less than one were obtained. Further experiments were done in the presence of bis(2-ethylhexyl) monohydrogenphosphoric acid (D2EHPA) or methyltrioctylammonium chloride (Aliquat 336) in the organic phase, to extract drugs from acidic and basic matrices, respectively. Results showed that transport of drugs from alkaline solution into 1M of sodium bromide occurred when the membrane was impregnated with dihexyl ether containing 20% Aliquat 336. To optimize the EF, the effects of different parameters such as the nature of organic solvent used to impregnate the membrane, compositions and volumes of SP and RP, type and concentration of carrier, extraction time and stirring rate were investigated. Optimal results were obtained in the presence of 0.005 M of NaOH (pH 11.70) in the SP, 1M of NaBr in the RP, 20% of Aliquat 336 in dihexyl ether as membrane impregnation solvent, stirring rate of 500 rpm and extraction time of 60 min. Under these conditions, enrichment factors of 52.9 and 213.1, dynamic linear ranges of 20-5000 and 10-5000, and limits of detection of 2.5 and 0.5 ng/ml were obtained for salbutamol and terbutaline, respectively. Also determination of drugs in environmental water and urine samples in the range of nanograms per millilitre with RSDs<10% was possible using HPLC-photodiode array detection or HPLC-MS.
Collapse
Affiliation(s)
- Yadollah Yamini
- Department of Chemistry, Tarbiat Modarres University, P.O. Box 11415-175, Tehran, Iran
| | | | | | | |
Collapse
|
21
|
Wang Z, Zhang Z, Fu Z, Chen D, Zhang X. Flow-injection chemiluminescence detection for studying protein binding of terbutaline sulfate with on-line microdialysis sampling. J Pharm Biomed Anal 2003; 33:765-73. [PMID: 14623603 DOI: 10.1016/s0731-7085(03)00416-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The binding of terbutaline sulfate to bovine serum albumin was studied in vitro using the technique of microdialysis sampling combined with flow-injection chemiluminescence analysis (FIA-CL). In the presence of formaldehyde, terbutaline sulfate can be oxidized by KMnO(4) to produce high chemiluminescence emission in sulfate acid media. The concentration of terbutaline sulfate is proportional with the CL intensity in the range of 1 x 10(-7)-2 x 10(-5) mol l(-1) with a detection limit of 3 x 10(-8) mol l(-1). The drug and protein were mixed in different molar ratios in 0.067 mol l(-1) phosphate buffer, pH 7.4, and incubated at 37 degrees C in a water bath. The microdialysis probe was utilized to sample the mixed solution at a perfusion rate of 5 microl min(-1) and the dialytic efficiency of terbutaline sulfate under the experimental conditions was 26.3%. The data obtained by proposed microdialysis flow-injection chemiluminescence method was analyzed with Scrathard analysis and Klotz plot. The estimated association constant (K) and the number of the binding site (n) on one molecule of BSA by Scrathard analysis were 4.11 x 10(4) l mol(-1) and 1.06, respectively. The proposed system proved that FIA-CL coupled with on-line microdialysis sampling is a simple and reliable technique for the study of drug-protein interaction.
Collapse
Affiliation(s)
- Zhouping Wang
- Department of Chemistry, Institute of Analytical Science, Southwest China Normal University, Beibei, Chongqing, 400715, P.R. China
| | | | | | | | | |
Collapse
|