PVC membrane ion selective electrode for the determination of pentachlorophenol in water, wood and soil using tetrazolium pentachlorophenolate

Abbas, Mohammed Nooredeen; Mostafa, Gamal A. E.; Homoda, Atef M.A.

doi:10.1016/s0039-9140(01)00475-1

Cited by 33 publications

(18 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in agreement with the literature data [19,20,25,26]. The results obtained with a 2% ion-pair content (TPB or TCPB) for four plasticizers are summarized in Table 3.…”

Section: Influence Of Plasticizer and Sensing Componentsupporting

confidence: 91%

Amodiaquine polymeric membrane electrode

Malongo

Blankert

Kambu

et al. 2006

Journal of Pharmaceutical and Biomedical Analysis

View full text Add to dashboard Cite

“…This is in agreement with the literature data [19,20,25,26]. The results obtained with a 2% ion-pair content (TPB or TCPB) for four plasticizers are summarized in Table 3.…”

Section: Influence Of Plasticizer and Sensing Componentsupporting

confidence: 91%

Amodiaquine polymeric membrane electrode

Malongo

Blankert

Kambu

et al. 2006

Journal of Pharmaceutical and Biomedical Analysis

View full text Add to dashboard Cite

“…[3][4][5] Potentiometric methods using ion-selective electrodes have wide applications [6][7][8][9][10][11] because they are simple, economical and available over a wide range of different areas, and offer sufficient selectivity towards the drug in the presence of various pharmaceutical excipients. The low cost, ease of use and maintenance, the simplicity and speed of assay procedure and the reliability of the analytical information make the ionselective electrodes very attractive for the assay of pharmaceutical products.…”

Section: Introductionmentioning

confidence: 99%

Mebendazole Selective Membrane Sensor and Its Application to Pharmaceutical Analysis

et al. 2007

View full text Add to dashboard Cite

IntroductionMebendazole (MBZ) (5-benzoyl-2-benzimidazolylcarbamic acid methyl ester) (C16H13N3O2) is a broad spectrum anthelmintic drug producing high cure rates in infestations by ascaris, thread worms, hook worms and whip worms.1,2 MBZ causes slow immobilization and death of the worms by selectively and irreversibly blocking uptake of glucose and other nutrients in susceptible adult intestines where helminths dwell.In recent years, potentiometric membrane sensors have been widely used in pharmaceutical analysis. [3][4][5] Potentiometric methods using ion-selective electrodes have wide applications 6-11 because they are simple, economical and available over a wide range of different areas, and offer sufficient selectivity towards the drug in the presence of various pharmaceutical excipients. The low cost, ease of use and maintenance, the simplicity and speed of assay procedure and the reliability of the analytical information make the ionselective electrodes very attractive for the assay of pharmaceutical products.The different analytical techniques available in the literature for the quantitative determination of MBZ include spectrophotometry, 12 high performance liquid chromatography, [13][14][15][16][17][18] liquid chromatography, 19 thin layer chromatography 20 and cathodic stripping voltammetry. 21 Most of these methods are complicated and need sophisticated instruments.In continuation to our work on drug analysis, 22-25 an attempt has been made to develop an electrochemical sensor for the anthelmintic drug mebendazole.The present work describes the fabrication, optimization and some possible applications of a novel MBZ PVC sensor based on the use of a mebendazole-silicotungstate ion pair complex as the electro active material and bis(2-ethylhexyl)phthalate (BEP) as plasticizer. The developed sensor displays high selectivity, long term stability, fast response and applicability over a wide range of pH and drug concentrations. Experimental Reagents and chemicalsAll chemicals used in the study were of highest purity available and were used without further purification. Polyvinyl chloride powder (PVC) of high molecular weight was supplied by Merck. Dibutyl sebacate (DBS), bis(2-ethylhexyl)phthalate (BEP), bis(2-ethylhexyl)adipate (BEA), bis(2-ethylhexyl)sebacate (BES), di-n-butyl phthalate (DBP), phosphotungstic acid (PTA), molybdophosphoric acid (MPA) and silicotungstic acid (STA) were purchased from Lancaster and used as received. Tetrahydrofuran (THF) was obtained from s.d. fine chemicals and all of the metal salts used (all from Merck) were of the highest purity available. Aqueous solutions of the salts were prepared by dissolving the appropriate salt or diluting standard solutions as specified in doubly distilled water. Aqueous solutions of the drug were freshly prepared by accurate dilutions of a standard 10 -1 M stock drug solution using dilute nitric acid (10% v/v) as solvent. Pure-grade MBZ was obtained as a gift sample. Pharmaceutical formulations containing MBZ were obtained from local drug stores....

show abstract

“…Therefore, the quantitative determination of PCP in soil and incubated earthworms is of high interest with regard to soil quality and remediation of contaminated soils. To this end, the accurate determination of low PCP-content is required [10,11]. Many methods have been described for the determination of PCP in the environment [11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Determination of pentachlorophenol in wastewater irrigated soils and incubated earthworms

Liu

Wen

Shan

2006

Talanta

View full text Add to dashboard Cite

The analyses of low pentachlorophenol (PCP) in soils and earthworms require a sensitive and reliable analytical method. In this paper, several derivatization methods and extraction solvents were compared systematically. The derivatization reagents included acetic anhydride, 2,3,4,5,6-pentafluorobenzyl bromide (PFBBr) and diazomethane. Hexane, acetone, hexane-acetone (1:1), dichloromethane and methanol were used as the extraction solvents. PFBBr derivatization showed the highest sensitivity. The derivatization parameters of PFBBr including the amount of PFBBr, the power and irradiation time of microwave were optimized. As a result, 200 l of PFBBr (10%) at 150 W of microwave oven for 30 min achieved the best result. The PFBBr derivatization method had the detection limit of 0.07 g l −1 of PCP. Extraction by a mixture of hexane and acetone (1:1) showed the best recoveries. The recommended method was used to determine the low PCP in soils irrigated by wastewater and earthworms incubated in the corresponding soils. The concentrations of PCP in soils were in the range of 1.38-179 ng g −1 , while those in earthworms were 11.2-262 ng g −1 . The recoveries of the surrogate standard (trichlorophenol) ranged from 81.1% to 107%, demonstrating the merit of the method.

show abstract

PVC membrane ion selective electrode for the determination of pentachlorophenol in water, wood and soil using tetrazolium pentachlorophenolate

Cited by 33 publications

References 19 publications

Amodiaquine polymeric membrane electrode

Amodiaquine polymeric membrane electrode

Mebendazole Selective Membrane Sensor and Its Application to Pharmaceutical Analysis

Determination of pentachlorophenol in wastewater irrigated soils and incubated earthworms

Contact Info

Product

Resources

About