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Journal articles on the topic 'Non-aqueous titration'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Palvanov, Narbek Sapaevich, and Adolat Farkhadovna Tillayeva. "Electrometric determination of cu (ii) cations, Zn (ii) and Cr (iii) in aqueous, water-non-aqueous and mixed solutions." American Journal Of Biomedical Science & Pharmaceutical Innovation 5, no. 2 (2025): 29–33. https://doi.org/10.37547/ajbspi/volume05issue02-08.

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This work presents the results of the potentiometric determination of aqueous, non-aqueous and mixed solvents of copper (II), zinc (II) and chromium (III) cations: (propanol-2, acetone, methyl ethyl ketone, toluene, carbon tetrachloride, dimethylformamide) and their mixtures with water in a ratio of 1:1 and 1:19 by volume, the ratios of acid-base titrations are given. The quantitative results of the titration on a per kilote basis for the indicated cations Cu2+, Zn2+ and Cr3+ are based on the acidity constants of these cations assessed in the solvent environment specified above. The influence

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2

Besenhard, J. O., H. P. Gansmann, and H. Meyer. "Bestimmung von Oberflächenoxiden auf Rußen durch potentiometrische Direkttitration in nichtwäßrigen Lösungsmitteln / Determination of Surface Oxides on Carbon Blacks by Direct Potentiometric Titration in Non-Aqueous Solvents." Zeitschrift für Naturforschung B 45, no. 6 (1990): 857–63. http://dx.doi.org/10.1515/znb-1990-0617.

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An attempt is made to quantitatively determine acidic and basic surface oxides on carbon blacks and also to monitor their acid and base strength distribution by direct potentiometric titrations in non-aqueous media.In contrast to direct titration procedures proposed so far, our method allows to distinguish clearly between several types of acidic surface oxides of different acid strength. This is mainly achieved by improvements of the non-aqueous titration media. The total contents of weakly and strongly acidic and also of basic oxides determined by this very fast method is comparable to result

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3

Vaishali, R. Patil, and P. Deohate Pradip. "The determination of pharmaceutically important ibuprofen by non-aqueous potentiometric titration method." Journal of Indian Chemical Society Vol. 90, Sep 2013 (2013): 1379–82. https://doi.org/10.5281/zenodo.5789139.

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Department of Chemistry, Shri Radhakisan Laxminarayan Toshniwal College of Science, Akola-444 001,Maharashtra, India <em>E-mail </em>: pradip22209l@yahoo.co.in <em>Manuscript received online 05 December 2012, revised 26 December 2012, accepted 30 December 2012</em> The determination of pharmaceutically important ibuprofen by non-aqueous potentiometric titration method using isopropyl alcohol as the solvent and KOH in isopropyl alcohol as the titrant has been established. The study of effect of solvent and concentration on potentiometric determination of ibuprofen has been carried out followed

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4

Villaseñor, Steven R., and George W. Limpert. "Simple rugged non-aqueous potentiometric titration assay for urea." Analyst 123, no. 5 (1998): 1149–50. http://dx.doi.org/10.1039/a801341a.

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5

Korenman, Ya I., and T. N. Yermolaeva. "Potentiometric titration of phenols in non-aqueous polar extract." Analyst 120, no. 9 (1995): 2387. http://dx.doi.org/10.1039/an9952002387.

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6

Pradip, P. Deohate. "Analysis of drug ofloxacin in bulk and single component pharmaceutical tablets by non-aqueous potentiometric titration method." Journal of Indian Chemical Society Vol. 95, May 2018 (2018): 559–62. https://doi.org/10.5281/zenodo.5642942.

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Department of Chemistry, Shri Radhakisan Laxminarayan Toshniwal College of Science, Akola-444 001, Maharashtra, India E-mail: pradip222091@yahoo.co.in <em>Manuscript received 05 March 2018, accepted 04 April 2018</em> Analysis of drug ofloxacin in bulk and single component pharmaceutical tablets has been carried out by non-aqueous potentiometric titration method using isopropyl alcohol as the solvent and KOH in isopropyl alcohol as the titrant. The effect of solvent and concentration on potentiometric analysis of drug ofloxacin as well as its analysis in bulk and single component pharmaceutica

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7

Mathews, D. H., J. R. Brown, and T. R. Welch. "Potentiometric titration of weak acids in non-aqueous solvents. IV. Titration of acids in bitumen." Journal of Applied Chemistry 12, no. 2 (2007): 64–73. http://dx.doi.org/10.1002/jctb.5010120203.

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8

Budevsky, O., T. Zikolova, and J. Tencheva. "NABTIT—a computer program for non-aqueous acid—base titration." Talanta 35, no. 11 (1988): 899–905. http://dx.doi.org/10.1016/0039-9140(88)80210-8.

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9

Y., K. AGRAWAL, та H. DESAI K. "Synthesis and Properties of α-Phenylcinnamohydroxamic Acids". Journal of Indian Chemical Society Vol. 68, Jun 1991 (1991): 356–58. https://doi.org/10.5281/zenodo.6157715.

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Department of Chemistry, University School of Sciences, Gujarat University, Ahmecl4bad-380 009 <em>Manuscript received 26 June 1990, revised 16 April 1991, </em><em>accepted 31 May 1991</em> Synthesis and Properties of α-Phenylcinnamohydroxamic Acids.

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10

Clemow, Leigh M., and W. Roy Jackson. "Non-aqueous titration of the acidic groups in coals: a warning!" Fuel 81, no. 7 (2002): 959–61. http://dx.doi.org/10.1016/s0016-2361(02)00003-0.

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11

Palvanov, Narbek Sapaevich, and Mukhiddin Sultanovich Mekhmanov. "Electrometric Determination Of Binary Mixtures In Food." American Journal of Applied sciences 03, no. 06 (2021): 8–13. http://dx.doi.org/10.37547/tajas/volume03issue06-02.

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In this paper, the possibility of acid-base titration of binary mixtures of dicarboxylic acids in mixed and non-aqueous solutions is investigated. The possibility of titrimetric potentiometric determination of binary mixtures of dicarboxylic acids is shown.

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12

Nyarku, S., and B. Bruce Sitholé. "Analysis of alkyl ketene dimer (AKD) by potentiometric titration." Canadian Journal of Chemistry 72, no. 2 (1994): 274–78. http://dx.doi.org/10.1139/v94-042.

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A simple and precise potentiometric titration method has been developed for the determination of milligram quantities of alkyl ketene dimer (AKD) in non-aqueous solvents. It involves the addition of chloroform solutions of AKD to an excess of an organic base followed by the titration of excess base with perchloric acid in glacial acetic acid. The method was used to determine non-reacted AKD extracted from hand-sheets: our results agreed with those obtained by capillary gas chromatography. The method was also used to monitor the stability of AKD formulations. Wood resin components and stearone,

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13

Kumar, Sunil, and Bigan Ram. "Analytical method development and validation of L-Carnitine L-Tartarate in Pharmaceutical Dosage forms (Multivitamin tablets) using non aqueous titration." Journal of Drug Delivery and Therapeutics 9, no. 4 (2019): 588–90. http://dx.doi.org/10.22270/jddt.v9i5.3591.

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The Non aqueous titration method was developed for quantitave analysis of L- Carnitine L-Tartarate in multivitamin tablets. The Non aqueous titration method was carried out using 0.1 N Perchloric acids. The present analytical method was validated according to ICH guidelines (ICH,Q2(R1)). The calibration curve was found to linear with correlation coefficient (r2=0.99995), Bias (-0.35) in the range of 50 to 150 % of standard solution. The precision and recovery were determined and all the parameter value found within acceptance limit. The value for both method and intermediate precision were fou

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14

MIHAJLOVIC, R., Z. SIMIC, L. MIHAJLOVIC, and M. VUKICEVIC. "Determination of autoprotolysis constants of some non-aqueous solvents using coulometric titration." Talanta 43, no. 12 (1996): 2131–36. http://dx.doi.org/10.1016/s0039-9140(96)02000-0.

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15

Zhigalina, A. A., O. Yu Strelova, and A. N. Grebenyuk. "Development of a Method for the Quantitative Determination of Genisten for the Certification of a Certified Reference Material." Drug development & registration 11, no. 4 (2022): 202–8. http://dx.doi.org/10.33380/2305-2066-2022-11-4-202-208.

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Introduction. One of the priority directions in the development of modern pharmacy is the search for new highly effective pharmaceutical substances with a high spectrum of pharmacological action and low toxicity. As a result of studies conducted by a number of authors, positive results have been shown for the use of genistein for the prevention and treatment of cardiovascular diseases and osteoporosis in menopausal women. It exhibits hypocholesterolemic and antidiabetic effects, as well as radioprotective properties. A comparative evaluation of genistein from soybean seed cake [Glycine max (L.

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16

Mihajlović, Ljiljana, Snežana Nikolić-Mandić, Branislav Vukanović, and Ranđel Mihajlović. "Use of the sulfide minerals pyrite and chalcopyrite as electrochemical sensors in non-aqueous solutions. The potentiometric titration of weak acids in alcohols." Open Chemistry 7, no. 4 (2009): 900–908. http://dx.doi.org/10.2478/s11532-009-0074-3.

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AbstractNatural monocrystalline pyrite and chalcopyrite were examined as new indicator electrodes for the potentiometric titration of weak acids in tert-butanol and iso-propanol. The electrodes investigated demonstrated a linear dynamic response for p-toluenesulfonic acid concentrations in the range from 0.1 to 0.001 M, with a Nernstian slope of 48 mV per decade for pyrite in tert-butanol. Sodium methylate, potassium hydroxide and tetrabutylammonium hydroxide (TBAH) proved to be suitable titrating agents. The response time was less than 12 s and the lifetime of the electrodes was higher than 1

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17

Huang, Cairui, Congcong Shen, Ling Jin, and Hongwei Cai. "Determination of Trace Amounts of Hydrofluoric Acid in Non-Aqueous Solutions by the Coulometric Titration Method." Sensors 18, no. 12 (2018): 4439. http://dx.doi.org/10.3390/s18124439.

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For monitoring of trace amounts of hydrofluoric acid in the organic fluorine chemical industry, a facile method for determination of the hydrofluoric acid in an ethanol solution of lithium chloride, by coulometric titration, was proposed. Relying on homemade acid–base coulometric autotitrator, the electrolyte was 0.50 mol·L−1 LiCl ethanol solution and the constant current intensity was 0.2–2 mA. As for the working electrode pair, a platinum plate was used as a working electrode, and a platinum wire was used as an auxiliary electrode. The indicating electrode was the pH composite glass electrod

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18

Rele, Rajan V. "A non-Aqueous Potentiometric Titration Method for Validation of Secnidazole from Pharmaceutical Dosages." Asian Journal of Research in Chemistry 12, no. 1 (2019): 25. http://dx.doi.org/10.5958/0974-4150.2019.00006.3.

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19

Ramadan, Abdul Aziz, Hasna Mandil, and Nour Ghazal. "Automatic Biamperometric Titration of Copper(II) by Iodide in Some Non-Aqueous Media." Asian Journal of Chemistry 25, no. 6 (2013): 3452–56. http://dx.doi.org/10.14233/ajchem.2013.13999.

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20

Zakhari, N., F. Ibrahim, and K. A. Kovar. "Non-aqueous titration of quinine and quinidine sulphates by use of barium perchlorate." Talanta 36, no. 7 (1989): 780–82. http://dx.doi.org/10.1016/0039-9140(89)80149-3.

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21

Patel, K. B., K. R. Desai, and H. S. Patelk. "Communication." High Performance Polymers 9, no. 4 (1997): 457–60. http://dx.doi.org/10.1088/0954-0083/9/4/009.

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Four various poly(urethane-urea)s (PUUs) were prepared by polycondensation of 3-aminophenol with various diisocyanates. The resultant poly(urethane-urea)s were characterized by elemental analyses, IR spectral studies, number average molecular weight ( Mn) estimated by non-aqueous conductometric titration and thermogravimetry. The electrical properties of these polymers have also been measured at room temperature.

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22

G., D. TEMBHARE, M. CHINCHOLKAR M., and B. KHARAT R. "Determination of 2-Hydroxy-5-methyldibenzoy)methane in Non-aqueous Medium by Enthalpimetric, Conductometric and Potentiometric Methods." Journal of Indian Chemical Society Vol. 69, Sep 1992 (1992): 609–10. https://doi.org/10.5281/zenodo.6088800.

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Department of Chemistry, Institute of Science, Nagpur-440 001 <em>Manuscript received 17 January 1991, revised 28 April 1992, accepted 18 June 1992</em> Determination of 2-Hydroxy-5-methyldibenzoylmethane in Non-aqueous Medium by Enthalpimetric, Conductometric and Potentiometric Methods.

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23

Curie, Catia Angli, Dianursanti, Wiratni Budhijanto, and Misri Gozan. "Titration vs. GC-MS Analysis to Determine the Factors Affecting the Esterification Activity of Candida rugosa Lipase Immobilized onto Celite." E3S Web of Conferences 503 (2024): 01003. http://dx.doi.org/10.1051/e3sconf/202450301003.

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The activity of lipases to catalyze the synthesis of esters in a non-aqueous environment can be assessed by performing a simple esterification study. In such tests, titration of the remaining acid has been one of the most used methods to determine the reaction progress due to its simplicity. Nonetheless, the execution of the titration is not always as simple as it sounds. In this study, Candida rugosa lipase is immobilized onto celite matrix, and its esterification activity was evaluated by catalyzing the reaction between butanol and butyric acid. Among the factors affecting the esterification

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24

Tanganov, B. B. "Applied aspects of acid-base interactions and modelling equilibrium concentrations in two-component acid mixtures." Proceedings of Universities. Applied Chemistry and Biotechnology 10, no. 3 (2020): 393–400. http://dx.doi.org/10.21285/2227-2925-2020-10-3-393-400.

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Fundamental and applied research into aqueous and non-aqueous solutions of strong and weak electrolytes remains to be highly relevant, which fact is confirmed by a large number of Russian and foreign publications. In almost all such publications, acid-base interactions are considered exclusively with regard to changes in hydrogen ion concentrations. However, the ionic strength of solutions is determined by all ions present in the system, the concentration of which varies during interactions. This is particularly true for potentiometric titration of strong and weak electrolytes not only in aque

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25

Rele, Rajan V., Pratamesh, and P. Tiwatane. "A Non-aqueous Potentiometric Titration Method for Validation of Imatinib mesylate from Pharmaceutical Dosages." Asian Journal of Research in Chemistry 12, no. 6 (2019): 307. http://dx.doi.org/10.5958/0974-4150.2019.00056.7.

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26

Kirishima, Akira, Takashi Ohnishi, Nobuaki Sato, and Osamu Tochiyama. "Determination of the phenolic-group capacities of humic substances by non-aqueous titration technique." Talanta 79, no. 2 (2009): 446–53. http://dx.doi.org/10.1016/j.talanta.2009.04.008.

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27

El-Sharkawy, El-Sayed A. "Non Aqueous Titration and Catalytic Conversion of Cyclohexanol as a Test of Surface Acidity." Monatshefte für Chemie - Chemical Monthly 137, no. 12 (2006): 1487–98. http://dx.doi.org/10.1007/s00706-006-0552-7.

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28

Rele, Rajan V. "A Non-Aqueous Potentiometric Titration Method for Validation of Drotaverine Hydrochloride from Pharmaceutical Dosages." International Journal of ChemTech Research 11, no. 11 (2018): 226–31. http://dx.doi.org/10.20902/ijctr.2018.111123.

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29

Wu, Liping, Xun Hu, Daniel Mourant, et al. "Quantification of strong and weak acidities in bio-oil via non-aqueous potentiometric titration." Fuel 115 (January 2014): 652–57. http://dx.doi.org/10.1016/j.fuel.2013.07.092.

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30

Kaushal, Sandeep, Pritpal Singh, and Susheel K. Mittal. "Yttrium (III) Selective Electrode Based On Zirconium (IV) Phosphoborate." Journal of New Materials for Electrochemical Systems 17, no. 1 (2014): 005–8. http://dx.doi.org/10.14447/jnmes.v17i1.435.

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Zirconium phosphoborate based heterogeneous membrane electrode has been used as a sensor for yttrium ions in aqueous medium. The electrode shows reproducible and Nernstian behavior for yttrium ions in the oncentration range 10-4M to 10-1M with an RSD of 2%. The electrode does not show any change in response within a pH range of 5-9. The effect of internal solution concentration on the calibration curve was also studied. The electrode performance was also studied in partially non-aqueous medium (5% - 20%) of acetone and ethanol. The system was used successfully as an indicator electrode in pote

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31

Pollard, A. M., R. G. Thomas, and P. A. Williams. "Synthesis and stabilities of the basic copper(II) chlorides atacamite, paratacamite and botallackite." Mineralogical Magazine 53, no. 373 (1989): 557–63. http://dx.doi.org/10.1180/minmag.1989.053.373.06.

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AbstractStrictly reproducible syntheses of the trimorphs of composition Cu2Cl(OH)3, atacamite, paratacamite, and botallackite, have been developed. In syntheses involving direct precipitation, or reaction of aqueous solutions with solid phases, reliable results are obtained only if the temperature and time of reaction are carefully controlled. Botallackite, the rarest of the naturally occurring trimorphs, is a key intermediate and crystallizes first under most conditions; subsequent recrystallization of this phase to atacamite or paratacamite, or of the latter from the former, depends upon the

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32

Abdulrahman, Sameer, and Kanakapura Basavaiah. "Non-aqueous titrimetric assay of gabapentin in capsules using perchloric acid as titrant." Chemical Industry and Chemical Engineering Quarterly 17, no. 2 (2011): 173–78. http://dx.doi.org/10.2298/ciceq101011001a.

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Two simple, rapid, accurate and inexpensive methods using visual and potentiometric titrimetric techniques are described for the determination of gabapentin (GBP) in bulk drug as well as in capsules. The methods are based on the neutralization reaction of the primary amino group of GBP with acetous perchloric acid as titrant in anhydrous acetic acid medium. The end point was detected either visually using crystal violet as indicator or potentiometrically using modified glass electrode SCE electrode system. Both methods are applicable over the range 1.0-16.0 mg of GBP and the titration reaction

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33

Rajan, V. Rele, and P. Tiwatane Prathamesh. "A validated non-aqueous potentiometric titration method for quantitative determination of alprazolam from pharmaceutical preparation." Asian Journal of Research in Chemistry 9, no. 11 (2016): 597. http://dx.doi.org/10.5958/0974-4150.2016.00080.8.

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34

Agrawal, Y. K., and R. D. Roshania. "Non-Aqueous Titrimetric Determination Of N-P-Chlorophenylbenzohydroxamic Acids: Visual And Potentiometric Titration In Dimethylformamide." Bulletin des Sociétés Chimiques Belges 89, no. 3 (2010): 175–79. http://dx.doi.org/10.1002/bscb.19800890304.

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35

Ephraim, James H. "Non-aqueous titration of a fulvic acid sample, with use of an internal reference compound." Talanta 36, no. 3 (1989): 379–82. http://dx.doi.org/10.1016/0039-9140(89)80204-8.

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36

Patel, Jayesh R., Dipan H. Sutaria, and Magan N. Patel. "Physicochemical study of complexation and ion-exchange properties of 2-hydroxy-4-ethoxypropiophenone—ethylene glycol polymer." High Performance Polymers 6, no. 2 (1994): 123–32. http://dx.doi.org/10.1177/095400839400600203.

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Copolymers (HEPP-EG) were synthesized by the condensation of 2-hydroxy-4-ethoxypropiophenone with ethylene glycol in presence of polyphosphoric acid as a catalyst. The copolymers were characterized by elemental analyses, IR spectra, viscosity and thermal studies. The number-average molecular weight (Mn) was measured by non-aqueous conductometric titration. The copolymer HEPP-EG-6 was complexed with metal ions, Cu2+, Ni2+, Co2, Mn2+ and Zn2+ and characterized. Chelation ion-exchange properties have been studied by employing the batch equilibration method.

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37

Patel, Hasmukh S., and Manhar J. Lad. "Novel Terpolymers: Poly(keto–amine–urea)S." High Performance Polymers 8, no. 2 (1996): 225–31. http://dx.doi.org/10.1088/0954-0083/8/2/004.

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Thermally stable polymers containing keto–amine–urea groups have been prepared by condensation of keto–amino groups containing diamine and various diisocyanates. The resulting polymer samples have been characterized by elemental analysis and IR spectra, and Mn estimated by non-aqueous conductometric titration and thermogravimetry. Curing of commercial epoxy resin-DGEBA by employing these polymers was scanned on a differential scanning colorimeter (DSC). Glass fibre reinforced composites (i.e. laminates) based on such terpolymer–epoxy resin system have also been prepared and characterized.

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38

Sharma, D. K., B. S. Sambra, N. Verma, and B. C. Verma. "Titration of Mercaptans and Some Mercaptan-Based Drugs with Iodine Monobromide in Non-Aqueous Dimethyl Sulfoxide." Collection of Czechoslovak Chemical Communications 62, no. 1 (1997): 42–46. http://dx.doi.org/10.1135/cccc19970042.

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Mercaptans undergo smooth and quantitative oxidation to the corresponding disulfides with iodine monobromide in non-aqueous (dimethyl sulfoxide) medium, which has been made the basis of a simple, rapid and rugged method for the determination of mercaptan-based drugs viz. mercaptopurine and dimercaprol. The method has been thoroughly tested with a number of mercaptans before applying it to drugs. The salient features of the method are discussed.

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39

Safarmamadov, Safarmamad M., Dilovar Ch Mirzokhonov, and Kimyo S. Mabatkadamzoda. "The COMPLEX FORMATION OF CADMIUM (II) WITH 2-METHYLIMIDAZOLE IN AQUEOUS AND AQUEOS-ALCOHOL SOLUTIONS." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 63, no. 10 (2020): 36–45. http://dx.doi.org/10.6060/ivkkt.20206310.6201.

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Using potentiometric titration data, titration curves of the protonated form of 2-methylimidazole [H2-MI]+ in water and water-alcohol solutions were constructed. Forms of formation curves correspond to weak monobasic acids. The value of the formation function () for the studied systems varies between 0.45-0.87, which corresponds to the formation of one protonated form of 2-methylimidazole in aqueous and aqueous - alcoholic solutions. The acid dissociation constant (pKa) of 2-methylimidazole at 298 K was determined by the pH - metric method in aqueous and aqueous - methanol (ethanol) solutions

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40

Tanvi, Kamble* Monali Khatke Nikita Pabale Mansi Shelke Vishweshwari Bhagat. "A Review on Remdesivir by Pharmaceutical Analytical Methods [HPLC]." International Journal of Pharmaceutical Sciences 2, no. 11 (2024): 1526–40. https://doi.org/10.5281/zenodo.14243862.

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This review focuses on the pharmaceutical analytical profile of Remdesivir, a crucial antiviral drug used to treat viral infections like SARS-CoV-2. It emphasizes the drug's pharmacological importance and structural attributes, highlighting the critical need for precise analytical techniques to ensure its efficacy, stability, and safety. The review explores various methods for analyzing Remdesivir, each tailored to address specific aspects of its quality and performance. Non-aqueous titration assesses the drug’s solubility and stability in non-water solvents, while isothermal titration c

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41

Sabo, Yusuf, W. L. O. Jimoh, Isa Baba Koki, and Q. O. Sholadoye. "Stability constants of complexes of metal ions with peatsoil humic acids under non-acid-conditions." Bayero Journal of Pure and Applied Sciences 14, no. 1 (2021): 54–63. http://dx.doi.org/10.4314/bajopas.v14i1.8.

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Stability constants of complexes of four divalent metal ions viz. Cu2+, Pb2+,Mg2+ and Cd2+ with humic acids (HA) were determined by potentiometric titration of humic acids with the corresponding salt of the divalent metals in aqueous media under non-acid-condition. The log K (logarithm of the stability constant) ranged from 1.0942 to 2.7471 for metal-humic acid complexes were determined using point-wise computational method. The order of stability constants were obtained as follows: Cu >Pb> Cd > Mg for metal -HA complexes respectively, indicating a higher degree of complexation with C

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42

Rele, Rajan V., and Dattaprasad G. Rane. "A validated non-aqueous potentiometric titration method for quantitative determination of clopidogrel bisulphate from pharmaceutical preparation." Asian Journal of Research in Chemistry 10, no. 1 (2017): 26. http://dx.doi.org/10.5958/0974-4150.2017.00004.9.

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43

Rajan, V. Rele, and P. Tiwatane Prathamesh. "A Validated Non-aqueous Potentiometric Titration Method for Quantitative Determination of Terbutaline Sulphate from Pharmaceutical Preparation." Asian Journal of Research in Chemistry 13, no. 2 (2020): 82. http://dx.doi.org/10.5958/0974-4150.2020.00017.6.

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44

Rele, Rajan V., and Prathamesh P. Tiwatane. "A validated non-aqueous potentiometric titration method for quantitative determination of bromhexine hydrochloride from pharmaceutical preparation." Asian Journal of Research in Chemistry 13, no. 4 (2020): 249. http://dx.doi.org/10.5958/0974-4150.2020.00048.6.

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45

Wang, Fei, Kejiang Liang, Mads Christian Larsen, et al. "Solvent-Controlled Self-Assembled Oligopyrrolic Receptor." Molecules 26, no. 6 (2021): 1771. http://dx.doi.org/10.3390/molecules26061771.

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We report a fully organic pyridine-tetrapyrrolic U-shaped acyclic receptor 10, which prefers a supramolecular pseudo-macrocyclic dimeric structure (10)2 in a less polar, non-coordinating solvent (e.g., CHCl3). Conversely, when it is crystalized from a polar, coordinating solvent (e.g., N,N-dimethylformamide, DMF), it exhibited an infinite supramolecular one-dimensional (1D) “zig-zag” polymeric chain, as inferred from the single-crystal X-ray structures. This supramolecular system acts as a potential receptor for strong acids, e.g., p-toluenesulfonic acid (PTSA), methane sulfonic acid (MSA), H2

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46

Basavaiah, Kanakapura, Nagaraju Rajendraprasad, and Basavaiah Vinay. "Microtitrimetric determination of a drug content of pharmaceuticals containing olanzapine in non-aqueous medium." Chemical Industry and Chemical Engineering Quarterly 15, no. 2 (2009): 77–81. http://dx.doi.org/10.2298/ciceq0902077b.

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Two simple, rapid, reliable and cost-effective methods based on titrimetry in non-aqueous medium are described for the determination of olanzapine in pharmaceuticals. In these methods, the drug dissolved in the glacial acetic acid was titrated with the acetous perchloric acid with visual and potentiometric end point detection, crystal violet being used as the indicator for visual titration. The methods are applicable over 1-15 mg range of olanzapine. The procedures were applied to determine olanzapine in pharmaceutical products and the results were found to be in a good agreement with those ob

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Qi, Xiaohe S., R. Brent Miller, Yoshihiro Namiki, John Zhang, and Robert Jacobus. "Effect of water content in perchloric acid on the non-aqueous potentiometric titration of nitrogen-containing compounds." Journal of Pharmaceutical and Biomedical Analysis 16, no. 3 (1997): 413–18. http://dx.doi.org/10.1016/s0731-7085(97)00082-4.

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Shoukat, Usman, and Hanna Katariina Knuutila. "Effect of Various Parameters on the Thermal Stability and Corrosion of CO2-Loaded Tertiary Amine Blends." Energies 13, no. 10 (2020): 2626. http://dx.doi.org/10.3390/en13102626.

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In this study, the thermal stability and corrosivity of various CO2-loaded tertiary amine blends in both aqueous and non-aqueous form in stainless steel cylinders were studied for combined acid gas and water removal. The thermal stability was measured from the remaining amine concentration and the corrosivity was measured from the amount of various metals in blends using titration and inductively coupled plasma mass spectrometry (ICP-MS), respectively. The experimental data were used to calculate the rate constants of amine group loss. The developed model represented the experimental data very

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Patel, K. D., M. M. Morekar, and Y. S. Tilak. "Synthesis, Characterization and Glass - Reinforced Composites of N,N'-Dimethylolthiourea – m-Aminophenol Resin." E-Journal of Chemistry 2, no. 2 (2005): 136–41. http://dx.doi.org/10.1155/2005/598974.

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N,N’-Dimethylolthiourea (DMTU) resin having the methylol group ( –CH2OH ) has been prepared and characterized. The condensation of DMTU resin with m-aminophenol was carried out in the presence of alcoholic alkali catalyst at varying ratios of DMTU: mAP, namely 1:1, 1:1.5 and 1:2. The resultant DMTUmAP resin was characterized by elemental analysis, IR spectral studies, number average molecular weight (M¯n) estimated by non-aqueous conductometric titration, and thermogravimetry. The curing study of DMTUmAP resin with hexamethylenetetramine (HMTA) was monitored by differential scanning calorimetr

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Patel, Hasmukh S., and Bharat C. Dixit. "Synthesis, Characterization and Glass-Reinforced Composites of Acetone–Formaldehyde–Phenol Resins." High Performance Polymers 9, no. 2 (1997): 153–60. http://dx.doi.org/10.1088/0954-0083/9/2/007.

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Acetone–formaldehyde (AF) resin having the methylol group (–CH2OH) has been prepared and characterized. The condensation of AF resin with phenol (P) was carried out in the presence of alcoholic alkali catalyst at varying ratios of AF:P, namely 1:1, 1:1.5 and 1:2. The resultant AFP resins were characterized by elemental analysis, IR spectral studies, number average molecular weight ( Mn) estimated by non-aqueous conductometric titration, and thermogravimetry. The curing study of AFP resins with hexamethylene tetramine (HMTA) was monitored by differential scanning calorimetry (DSC) and kinetic p

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