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Articles de revues sur le sujet « Titration »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 25 juillet 2025

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1

Fuhrmann, B., and U. Spohn. "A PC-based titrator for flow gradient titrations." Journal of Automatic Chemistry 15, no. 6 (1993): 209–16. http://dx.doi.org/10.1155/s1463924693000276.

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This paper describes a PC (personal computer) based titrator which was developed for gradient flow titrations. Concentration gradients were generated electrolytically or volumetrically in small tubes. Complete titration curves can be recorded on-line and evaluated automatically. The titrator can be used with all liquid flow detectors with low axial dispersion. The titrator was evaluated for the titration of thiosulphate with electrogenerated triiodide and for the titration of ammonia with electrogenerated hypobromite after continuous gas dialytic separation of ammonia from the sample solution.

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FERNANDEZ-MAESTRE, Roberto. "THE IMPORTANCE OF TEACHING TITRATION CURVES IN ANALYTICAL CHEMISTRY." Periódico Tchê Química 17, no. 34 (2020): 213–19. http://dx.doi.org/10.52571/ptq.v17.n34.2020.230_p34_pgs_213_219.pdf.

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Titration curves are an essential subject of an Analytical Chemistry course. The main objective of calculating titration curves is the selection of an indicator for such titrations. The calculation of titration errors is imperative because they establish if a given indicator can be used for a given titration. This study reviews the available literature on titration curves and calculating their errors. Its purpose is to draw attention to the importance of undergraduate chemistry students having competencies to determine the titration errors rather than skills to build titration curves as the ul

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Brooks, Olivia, Joan C. Y. Ng, and Sarah Ickowicz. "Outpatient Rapid Titration of Slow Release Oral Morphine for the Treatment of Opioid Use Disorder in a Canadian Setting: A Case Series." Journal of Addiction Medicine 17, no. 4 (2023): e240-e245. http://dx.doi.org/10.1097/adm.0000000000001149.

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Introduction In the midst of unprecedented opioid overdose deaths, opioid agonist therapy induction strategies that allow for rapid titration to therapeutic doses for individuals at high risk of overdose are needed. Slow release oral morphine (SROM) is an effective treatment for opioid use disorder; however, current guideline-recommended titration strategies require weeks to achieve therapeutic dose for individuals with high opioid tolerance. Individuals may be lost to care or experience overdose due to ongoing use of unregulated opioids during this time. After years of experience titrating SR

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Ayoub, Muhammad Haris, Shehryar Ahmad, Zia Ul Hassan, et al. "Understanding non-covalent interactions of graphene oxide toward transition metal surfaces and relation of binding constants with titration end points from dynamic light scattering studies." Journal of Applied Physics 133, no. 2 (2023): 025303. http://dx.doi.org/10.1063/5.0134267.

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The understanding of non-covalent binding interactions of graphene oxide toward transition metal surfaces (Fe, Co, Ni, and Cu) was observed by ultraviolet–visible absorption spectroscopy, fluorescence emission spectroscopy, hydrodynamic size, and zeta potential studies through titration experiments. These interactions mainly occur through C=C double bonds of graphene oxide. Iron and cobalt nanoparticles interact strongly as compared to nickel and copper nanoparticles. The obtained Stern–Volmer plots are curved indicating that static and dynamic quenching occur simultaneously in these systems.

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Feitkenhauer, H., and U. Meyer. "On-line titration of non-ionic surfactants in wastewater treatment plants using a specific electrode." Water Science and Technology 45, no. 4-5 (2002): 61–68. http://dx.doi.org/10.2166/wst.2002.0552.

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Textile finishing industry wastewater often contains high concentrations of surfactants. Non-ionic surfactants like alcohol ethoxylates are among the most used surfactants and are discharged from batch-processes in widely varying concentrations. The anaerobic biomass and especially methanogenic microorganisms have been shown to be inhibited by surfactants. To protect these microorganisms from irreversible inhibition a measurement of the surfactant concentration is useful for the process control, but most analytical methods are too complicated and expensive for an on-line process control. It wa

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Doyle, G., I. Szollosi, T. Segal, and C. Downey. "P041 Audit findings of Bilevel Titrations performed in 2022 at a Public Sleep Laboratory." Sleep Advances 4, Supplement_1 (2023): A50. http://dx.doi.org/10.1093/sleepadvances/zpad035.126.

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Abstract Introduction The aim of this audit was to benchmark and grade outcomes of NIV titrations for chronic hypercapnia as per the NPPV titration task force of the AASM. Methods All NIV studies performed in 2022 were included in the audit. Titration gradings of success were defined as per the NPPV titration task force. Each change in setting was reviewed for consistency with laboratory protocols based on task force guidelines. Results 50 of 72 NIV titrations have been audited to date. Patients were mean age (56.4 years +/-17.6), 59% male, with the following pathophysiology leading to chronic

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Gibson, Graham, Alexei A. Neverov, and R. S. Brown. "Potentiometric titration of metal ions in methanol." Canadian Journal of Chemistry 81, no. 6 (2003): 495–504. http://dx.doi.org/10.1139/v03-035.

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The potentiometric titrations of nine lanthanideIII triflates, ZnII and CuII triflate, and the NiII, CoII, MgII, and TiIV perchlorates were obtained in methanol to determine the titration constants (defined as the sspH at which the [OCH3]/[Mx+]t ratios are 0.5 and 1.5) as well as the apparent sspKa values for deprotonation of the metal-bound solvent molecules. The titrations were performed under various conditions with and without added salts as electrolytes, and the variations in the titration constants are discussed. In selected cases (La3+, Zn2+) the titration profiles were analyzed using

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Bodiroga, Milanka, and Jasminka Ognjanovic. "Determination of peracetic acid and hydrogen peroxide in the mixture." Vojnosanitetski pregled 59, no. 3 (2002): 277–79. http://dx.doi.org/10.2298/vsp0203277b.

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Iodometric and permanganometric titrations were used for determination of peracetic acid and hydrogen peroxide (H2O2) in the mixture. Two procedures were described and compared. Titrations could be done in only one vessel, in the same reaction mixture, when iodometric titration of peracetic acid was continued after the permanganometric titration of H2O2, (procedure A). Peracetic acid and H2O2, as oxidizing agents, reacted with potassium iodide in an acid medium, evolving iodine. This reaction was used for the quantitative iodometric determination of total peroxide in procedure B. H2O2 reacted

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Gonzalez, G. G., A. M. Jimenez, and A. G. Asuero. "Titration errors in acid-base titrations." Microchemical Journal 41, no. 1 (1990): 113–20. http://dx.doi.org/10.1016/0026-265x(90)90103-c.

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Gabhale, Sanjay D., Ekta Gupta, Mahavir Satishchand Bagrecha, Rehan Saifuddin, Anish Nelson, and Mayank Sharma. "Auto-PAP Titration Efficacy in Obstructive Sleep Apnea: A Single-Center Experience." Journal of Pharmacy and Bioallied Sciences 16, Suppl 1 (2024): S302—S304. http://dx.doi.org/10.4103/jpbs.jpbs_501_23.

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ABSTRACT Introduction: Obstructive sleep apnea, often known as OSA, is a sleep-related breathing disease that, if not treated, can lead to serious disabilities or even death. Continuous positive airway pressure (CPAP) is the therapy technique that is suggested for treating severe and moderate OSA. An auto/manual CPAP titration study can be used to determine the appropriate pressure that must be maintained to treat this condition. The motive of this research is to appraise the effectiveness among OSA patients for the auto-PAP titrations. Methodology: A cross-sectional clinical prospective study

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Bhavya sri Khagga, Srija Ghanukota, and Sumakanth Mogili. "Novel titrimetric method for the determination of rosuvastatin in pure form." World Journal of Biology Pharmacy and Health Sciences 13, no. 2 (2023): 001–4. http://dx.doi.org/10.30574/wjbphs.2023.13.2.0054.

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In this experiment assay of Rosuvastatin was performed by titrimetric method. The titration performed is a complexometric titration. The complexometric titration used is an easy, inexpensive volumetric titration method. This method is based on rection of calcium with a solution of disodium ethylenediaminotetraacetate (EDTA). Complex of calcium and EDTA is formed. Erichrome black Tis used as an indicator in this complexometric titration. At pH 12-13, Erichrome black T changes the color from pink to blue. The appearance blue color is determined to be the endpoint of this experiment. The titratio

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Bhavya, sri Khagga, Ghanukota Srija, and Mogili Sumakanth. "Novel titrimetric method for the determination of rosuvastatin in pure form." World Journal of Biology Pharmacy and Health Sciences 13, no. 2 (2023): 001–4. https://doi.org/10.5281/zenodo.7948477.

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In this experiment assay of Rosuvastatin was performed by titrimetric method. The titration performed is a complexometric titration. The complexometric titration used is an easy, inexpensive volumetric titration method. This method is based on rection of calcium with a solution of disodium ethylenediaminotetraacetate (EDTA). Complex of calcium and EDTA is formed. Erichrome black Tis used as an indicator in this complexometric titration. At pH 12-13, Erichrome black T changes the color from pink to blue. The appearance blue color is determined to be the endpoint of this experiment. The titratio

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Ayodele, Olufunmilayo D., Hawa O. Olabode, and Tawakalitu Bolarinwa. "The use of plant extracts as indicators in teaching acid-base titrations: Case of Hibiscus sabdariffa (Zobo), Beta vulgaris (Beet root), Hibiscus rosa sinensis and Acalypha wilkesiana." Integrity Journal of Education and Training 4, no. 4 (2020): 53–61. http://dx.doi.org/10.31248/ijet2020.087.

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Acid-base titrations are the main part of volumetric analysis in the secondary school chemistry practical syllabus in Nigeria. Synthetic indicators are generally used in teaching students the procedure and skills required in acid-base titrations. However, some of these synthetic indicators are not readily available, some are toxic and there is a special procedure to be followed in preparing them for use as indicators. Hence there is need to consider the suitability of natural indicators which are more readily available, easy to prepare and ecofriendly compared. Therefore, this study aimed at i

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Elfa, Noor, and Rina Nur Hidayah. "POTENTIAL OF DAYAK ONION SKIN (ELEUTHERINE PALMIFOLIA) EXTRACT AS AN ALTERNATIVE INDICATOR FOR ACID BASE TITRATION PRACTICUM." Quantum: Jurnal Inovasi Pendidikan Sains 15, no. 1 (2024): 68. http://dx.doi.org/10.20527/quantum.v15i1.17192.

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Synthetic indicators such as phenolphthalein are used during acid-base titrations to determine the end point of the titration. These indicators are not environmentally friendly and the price is high. To overcome this, it is necessary to study the potential of natural indicators available in the environment, one of which was Dayak onion skin which has not been utilized after the tubers have been taken as an anti-cancer herbal medicine. The aim of this research was to determine the potential of Dayak onion skin (Eleutherine Palmifolia) as a natural indicator in acid-base titrations. The sampling

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DiMaria, Michelle, Brian Schultz, Jennifer Falvo, et al. "0502 Harmony in the Sleep Lab: A Focus on Recognition of Hypoventilation and Direct Feedback Improves Quality of Pediatric Titrations." Sleep 45, Supplement_1 (2022): A222. http://dx.doi.org/10.1093/sleep/zsac079.499.

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Abstract Introduction Over 350 pediatric polysomnogram titrations (T-PSGs) are performed each year at the Sleep Laboratory at Children’s Hospital of Philadelphia in three locations by 24 different polysomnography technologists (PSGTs) on a diverse patient population, typically performed as outpatient procedures and occasionally at the bedside as inpatients. PSGTs are responsible for titration of continuous or bilevel positive airway pressure based on flow, work of breathing, arousals, and/or gas exchange. PSGTs have varying degrees of experience; thus, maintaining quality of T-PSGs is challeng

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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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Price, Randi, and Ping Wan. "Determination of Quaternary Ammonium Compounds by Potentiometric Titration with an Ionic Surfactant Electrode: Single-Laboratory Validation." Journal of AOAC INTERNATIONAL 93, no. 5 (2010): 1542–52. http://dx.doi.org/10.1093/jaoac/93.5.1542.

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Abstract A potentiometric titration for determining the quaternary ammonium compounds (QAC) commonly found in antimicrobial products was validated by a single laboratory. Traditionally, QACs were determined by using a biphasic (chloroform and water) manual titration procedure. Because of safety considerations regarding chloroform, as well as the subjectivity of color indicator-based manual titration determinations, an automatic potentiometric titration procedure was tested with quaternary nitrogen product formulations. By using the Metrohm Titrando system coupled with an ionic surfactant elect

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Pham, A., A. Adams, M. Vandeleur, and M. Griffiths. "P112 Auto-titrating positive airway pressure in paediatric patients with obstructive sleep apnoea." Sleep Advances 5, Supplement_1 (2024): A67. https://doi.org/10.1093/sleepadvances/zpae070.194.

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Abstract Background Continuous positive airway pressure (CPAP) is the gold standard for treating obstructive sleep apnoea (OSA) in children. Standard practice involves in-laboratory titration polysomnography to determine the optimal treatment pressure for CPAP. Auto-titrating positive-airway-pressure (APAP) devices can automate this process. However, its use in children is not well studied. Methods Children receiving CPAP therapy for OSA were invited to participate in this study. They made two visits to the sleep laboratory within 4 weeks; the first was for CPAP titration, and the second was f

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Al-Ghannam, Sheikha M., Abdalla M. S. Abulkibash, and Abeer M. Al-Olyyan. "Differential Electrolytic Potentiometric Determination of Some Amino Acids in Dosage Forms." Journal of AOAC INTERNATIONAL 87, no. 3 (2004): 671–76. http://dx.doi.org/10.1093/jaoac/87.3.671.

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Abstract The application of direct-current differential electrolytic potentiometry to the nonaqueous titration of amino acids was investigated. The basic character of amino acids in acetic acid was enhanced to permit their direct titration with perchloric acid. A pair of antimony electrodes was used as an indicating system. The shapes of the titration curves obtained were almost symmetrical with sharp peaks. The optimum current density for those titrations was found to be 1–2 μA/cm2. The procedure was applied successfully to the determination of certain amino acids in drug formulations, and th

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Cavalcanti, Bernadete F., Lourdes Cristina Lucena Agostinho, and Luciano Nascimento. "DETERMINATION OF ALKALINITY AND DISSOCIATION CONSTANTS OF HIGH SALINITY WATERS: USE OF F5BC TITRATION FUNCTION." Eclética Química Journal 35, no. 2 (2018): 79. http://dx.doi.org/10.26850/1678-4618eqj.v35.2.2010.p79-87.

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Measurements of parameters expressed in terms of carbonic species such as Alkalinity and Acidity of saline waters do not analyze the influence of external parameters to the titration such as Total free and associated Carbonic Species Concentration, activity coefficient, ion pairing formation and Residual Liquid Junction Potential in pH measurements. This paper shows the development of F5BC titration function based on the titrations developed by Gran (1952) for the carbonate system of natural waters. For practical use, samples of saline watersfrom Pocinhos reservoir in Paraiba were submitted to

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Mallick, Abhijit. "Study of Estimation of Hardness of Water Using pH-Meter." International Research Journal of Pure and Applied Chemistry 25, no. 6 (2024): 78–86. https://doi.org/10.9734/irjpac/2024/v25i6886.

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The hardness of water is one of the important parameters of water quality. The complexometric titration method is a prevalent technique to estimate concentrations of and ions individually, which are primarily responsible for the hardness of water. However, the method needs two external indicators to mark the end points of titrations. Furthermore, accuracy of the method is sacrificed due to inevitable parallax errors during marking of the endpoint of titration. This present work reports that during titration of a hard water sample with a complexing agent (here, solution), changes continuously.

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Gündüz, Turgut, Esma Kiliç, Güleren Özkan, Muhammed F. Awaad, and Mustafa Tastekin. "Conductimetric and potentiometric investigation of effect of acidity on formation of homoconjugates in acetonitrile solvent." Canadian Journal of Chemistry 68, no. 5 (1990): 674–78. http://dx.doi.org/10.1139/v90-103.

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In the present work, 11 aromatic and nine aliphatic carboxylic acids, namely benzoic, 2-nitrobenzoic, 3-nitrobenzoic, 4-nitrobenzoic, 2,4-dinitrobenzoic, 3,5-dinitrobenzoic, 2-aminobenzoic, 3-aminobenzoic, 4-aminobenzoic, o-phthalic, salicylic, formic, acetic, monochloroacetic, dichloroacetic, trichloroacetic, propionic, n-butyric, caprylic, and myristic acids, were titrated conductimetrically and potentiometrically with triethylamine in acetonitrile solvent, under a nitrogen atmosphere, at 25 °C. Closer investigation of the conductimetric titration curves of these acids showed that the acidit

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Morák, M., and Ústi nad Labem. "Titration von Alkylammoniumsalzen / Titrations of Alkyl Ammonium Salts." Tenside Surfactants Detergents 26, no. 3 (1989): 215–21. http://dx.doi.org/10.1515/tsd-1989-260316.

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Ramette, Richard W. "Gravimetric Titrations: In Support of Weight Titration Techniques." Journal of Chemical Education 81, no. 12 (2004): 1715. http://dx.doi.org/10.1021/ed081p1715.2.

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Cavalcanti, B. F., L. C. L. Agostinho, and L. Nascimento. "Determination of Alkalinity and dissociation constants of high salinity waters: use of F5BC titration function." Eclética Química 35, no. 2 (2010): 79–87. http://dx.doi.org/10.1590/s0100-46702010000200009.

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Measurements of parameters expressed in terms of carbonic species such as Alkalinity and Acidity of saline waters do not analyze the influence of external parameters to the titration such as Total free and associated Carbonic Species Concentration, activity coefficient, ion pairing formation and Residual Liquid Junction Potential in pH measurements. This paper shows the development of F5BC titration function based on the titrations developed by Gran (1952) for the carbonate system of natural waters. For practical use, samples of saline waters from Pocinhos reservoir in Paraiba were submitted t

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Chua, Yi Jiang, Luqman Ibrahim, Shireene Ratna Vethakkan, Jeyakantha Ratnasingam, Lee Ling Lim, and Sharmila Paramasivam. "COMPARISON OF TITRATION ALGORITHMS IN INSULIN-NAÏVE PATIENTS WITH TYPE 2 DIABETES MELLITUS INITIATED WITH BASAL INSULIN NPH." Journal of the ASEAN Federation of Endocrine Societies 38, S2 (2023): 3. https://doi.org/10.15605/jafes.038.s2.03.

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INTRODUCTIONInsulin is one of the most widely used injectable diabetic medications especially in patients with long-standing T2DM.Various patient-led basal insulin titration regimens have been shown to be effective and safe to be carried out in an outpatient setting. We designed this prospective randomized study to compare the difference in the patient- led basal NPH insulin titration method (daily titration versus every 3-day titration) in reducing HbA1c among patients with T2DM. METHODOLOGYIn this prospective interventional study, insulin naïve patients were randomized to either a daily basa

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Peng, Victor, Nauras Hwig, Anayansi Lasso-Pirot, Amal Isaiah, and Montserrat Diaz-Abad. "0529 Average volume-assured pressure support as rescue therapy after CPAP failure in pediatric obstructive sleep apnea." Sleep 45, Supplement_1 (2022): A233. http://dx.doi.org/10.1093/sleep/zsac079.526.

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Abstract Introduction Average volume-assured pressure support with autotitrating EPAP (AVAPS-AE) is an automatically titrating mode of noninvasive ventilation (NIV) which provides a targeted tidal volume through adjustment of inspiratory pressures within a set range. In pediatric obstructive sleep apnea (OSA), adenotonsillectomy (AT) is often the first-line treatment and CPAP is often poorly tolerated as an alternative. We aimed to evaluate the efficacy of AVAPS as a potential option for children in whom CPAP titration is unsuccessful. Methods Retrospective review of records of children diagno

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Liu, Xing Xin, and Artem Melman. "Formation of Ternary Complexes of Iron(III) Cations in Solution and Gas Phase." Australian Journal of Chemistry 66, no. 7 (2013): 791. http://dx.doi.org/10.1071/ch13179.

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Formation of labile 1 : 1 : 1 ternary mononuclear complexes of iron(iii) cation with η3-terdentate meridional binders was studied using electrospray ionisation mass spectrometry (ESI-MS) titration and UV-Vis titration in solution phase. Low selectivities towards formation of ternary heteroleptic complexes in the solution phase vs. symmetric 2 : 1 complexes were obtained with combinations of dianionic 2,6-bis[hydroxy(methyl)amino]-1,3,5-triazine (BHT) ligands with monoanionic terdentate ligands such as 2-[(2-pyridinylmethylene)amino]phenol. Moderate selectivities were observed in formation of t

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Shyichuk, Alexander, Dorota Ziółkowska, Jan Lamkiewicz, and Maria Kowalska. "Calcium Determination by Complexometric Titration with Calcein Indicator Using Webcam for Endpoint Detection." Water 17, no. 12 (2025): 1757. https://doi.org/10.3390/w17121757.

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Precise and convenient analytical methods are needed for the quantitative determination of calcium in water and food. Complexometric titration remains a reliable technique to determine calcium in milligram amounts. The titrations have been performed automatically by detecting color transitions with a webcam. Classical complexometric indicator calcein provided a sharp color transition. In diffuse reflection mode, the color appearance parameter (Hue) provides better precision and is more resistant to ambient light fluctuations compared to RGB primaries. In fluorescence mode with LED illumination

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Golovko, Dmitriy, Virender Sharma, Olga Pavlova, et al. "Determination of submillimolar concentration of ferrate(VI) in alkaline solutions by amperometric titration." Open Chemistry 9, no. 5 (2011): 808–12. http://dx.doi.org/10.2478/s11532-011-0069-8.

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AbstractA new amperometric titration method was developed for quantitative determination of ferrate(VI) (FeVIO42−) in the 7.06×10−5−5.73×10−3 M concentration range. Chromium(III) hydroxide solution was used as the titrant. The diffusion current (Id) had a linear relationship with the concentration of ferrate(VI) and slopes were dependent on the concentration of NaOH. The amperometric titration could detect a lower concentration of ferrate(VI) than could potentiometric and colorimetric titrations. The method was applied successfully to determine concentrations of ferrate(VI), generated electroc

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Nuebel, Matthew, Jonathan G. Leung, Christopher Hughes, and Ian McGrane. "Evaluation of major adverse events of clozapine based on accordance to an international titration guideline." Mental Health Clinician 14, no. 3 (2024): 204–11. http://dx.doi.org/10.9740/mhc.2024.06.204.

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Introduction Clozapine is the only antipsychotic approved for treatment-resistant schizophrenia, but without appropriate monitoring, it can be associated with potentially fatal outcomes. An International Adult Clozapine Titration Guideline categorizes patients into normal or slow metabolizers. Categorization provides clozapine titration schedules and recommends regular c-reactive protein (CRP) and clozapine concentration monitoring to reduce the risk of adverse drug reactions (ADRs). The impact of the guideline on clozapine ADRs has not been evaluated. Methods A retrospective chart review asse

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Peak, Megan. "Titration." Ploughshares 41, no. 4 (2015): 80. http://dx.doi.org/10.1353/plo.2015.0194.

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Kikuchi, *Yuki, Hiroshi Komatsu, Yuji Otsuka, et al. "SLOWER CLOZAPINE TITRATION THAN THE OFFICIAL JAPANESE PROTOCOL LED TO FEWER INFLAMMATORY ADVERSE EFFECTS." International Journal of Neuropsychopharmacology 28, Supplement_1 (2025): i25. https://doi.org/10.1093/ijnp/pyae059.044.

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Abstract Background Higher frequencies of inflammatory adverse effects of clozapine have been reported in Japan (Kishi et al., 2013; Tsukahara et al., 2021). Tsukahara et al. reported 38 % (57/152) clozapine- induced fever, 5 % (7/152) myocarditis, 13 % (20/152) pleuritis, and 1 % interstitial nephritis (2/152) in 152 patients first introduced to clozapine. The international titration protocol for Asians has set slower dose titration than the Japanese package insert to prevent clozapine-induced inflammatory adverse effects (de Leon et al., 2022). Aims & Objectives We hypothesized that a do

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S., C. LAVALE. "Hot Amperometric Titration for Estimation of Trace Amounts of Lanthanum and Cerium." Journal of Indian Chemical Society Vol. 63, June 1986 (1986): 605–6. https://doi.org/10.5281/zenodo.6271847.

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Post Graduate Chemistry Department, Government College, Betul-460 001 <em>Manuscript received 30 September 1986, revised 8 June 1986, accepted 18 June 1986</em> Trace amounts of La<sup>III</sup> and Cent have been estimated quantitatively with xylenol orange (XO) using hot amperometric titration technique. In hot condition, the increase in reversibility and ease of reduction facilitate the metal-ligand complexation. The titrations have been performed at <em>p</em>H 5.5, <em>µ</em>=0.2 and temp.=70°. The stiochiometric ratio of metal-XO complex is found to be 1 : 1. Many ions donot in

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Tian, Suming, Minjun Liu, Shina Qiao, and Yue Wu. "Rapid titration of opiate doses via patient-controlled intravenous analgesia for patients with severe cancer pain." European Journal of Inflammation 16 (January 1, 2018): 205873921877420. http://dx.doi.org/10.1177/2058739218774204.

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This study was to investigate the feasibility and safety of patient-controlled intravenous analgesia for opiate titration in patients with severe cancer. Eligible patients with cancer pain were randomly divided into two groups, which were titrated with a subcutaneous injection of morphine and patient-controlled intravenous analgesia, respectively. The time required for patients to begin titration to reach visual analog scale score ⩽ 3, the adverse reactions during titration, the time spent by nurses in titrating each patient, and the time to complete the titration with a delayed-release dosage

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Mallick, Abhijit, and Anindya Saha. "Study on Estimation of Alkalinity of Water Sample Using a Novel Technique pH-Metric Method." International Research Journal of Pure and Applied Chemistry 26, no. 3 (2025): 1–10. https://doi.org/10.9734/irjpac/2025/v26i3912.

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The alkalinity of water is one of the important parameters of water quality. The volumetric titration method using a standardized hydrochloric acid solution is a prevalent technique to estimate individual concentrations of basic radicals, like, , , and ions, which are primarily responsible for the alkalinity of water. However, the method needs two external indicators, namely phenolphthalein and methyl red to mark the end points of titrations. Furthermore, accuracy of the method is sacrificed due to inevitable parallax errors during marking of the end point of titration. This present work repor

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Glidewell, Geoffrey, Nathan Walker, Heidi Roth, Brad Vaughn, Zheng Fan, and Katelyn Bricker. "0494 Sleep Related Respiratory Events on Buprenorphine Compared to Naltrexone." SLEEP 47, Supplement_1 (2024): A212—A213. http://dx.doi.org/10.1093/sleep/zsae067.0494.

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Abstract Introduction Opioid medications are associated with an increased risk of sleep related respiratory events, especially central apneas. However, the potential impact of partial agonists (buprenorphine) and full antagonists (naltrexone) is less well known. In this study we hypothesize that patients using buprenorphine will have a greater prevalence of central apneas and require more frequent use of bilevel PAP therapy than those using naltrexone. Methods We performed a retrospective chart review of patients in a sleep laboratory database identifying patients who were prescribed naltrexon

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Davidson, Judy E., Neal Doran, Amber Petty, et al. "Survey of Nurses’ Experiences Applying The Joint Commission’s Medication Management Titration Standards." American Journal of Critical Care 30, no. 5 (2021): 365–74. http://dx.doi.org/10.4037/ajcc2021716.

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Background Critical care nurses titrate continuous infusions of medications to achieve clinical end points. In 2017, The Joint Commission (TJC) placed restrictions on titration practice, decreasing nurses’ autonomous decision-making. Objectives To describe the practice and perceptions of nurses regarding the 2017 TJC accreditation/regulatory standards for titration of continuous medication infusions. Methods A survey of nurses’ experiences titrating continuous medication infusions was developed, validated, and distributed electronically to members of the American Association of Critical-Care N

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Azkiya, Noor Isnaini, Shafara Najla Marinda Sukmawanta, and Cucuk Evi Lusiani. "Utilization of Red Dragon Fruit (Hylocereus polyrhizus) Peel Waste as an Alternative Indicator for Acid - Base Titration." Jurnal Teknik Kimia dan Lingkungan 9, no. 1 (2025): 31–37. https://doi.org/10.33795/jtkl.v9i1.6169.

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Titration indicators are organic (generally) or inorganic compounds used in titrations to determine and indicate the end point of a titration. Indicators that are widely used in acid-base titrations are synthetic indicators such as phenolphthalein (PP), methyl red (MM), methyl orange (MO), and phenol red (MF). Apart from being relatively expensive, the use of these indicators also produces chemical waste which can pollute the environment. The solution to overcome this problem is to utilize natural ingredients as a substitute for synthetic indicators. The natural indicator used in this research

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Sneha, G. Nair, S. More Tushar, and R. Jadhav Vikram. "A Procedure Employing for Redox Titration: Balancing the Redox Chemical Equation in Acidic or Basic Medium." International Journal of Research and Review 7, no. 5 (2020): 99–102. https://doi.org/10.5281/zenodo.3938452.

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Graduate and post graduate students find much more difficulty during the concept of the balancing redox chemical equation in acidic or basic medium. Teachers are well aware of the importance of the balancing redox chemical equation in both medium and also teaching difficulty associated with it. In an attempt to improving the understanding of the balancing the redox chemical equation with reduced difficulty, a mathematical approach that provides easier understanding has been developed and successfully employed in graduate and post graduate students. In this study, relation between an oxidising

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Sawant, Omkar, Devendra Jagtap, Shah Roshan, and Prof Nitin Satao. "Flower Extract of Ixora Coccinea as A Natural Indicator in Acid Base Titration." International Journal for Research in Applied Science and Engineering Technology 10, no. 4 (2022): 1547–49. http://dx.doi.org/10.22214/ijraset.2022.41499.

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Abstract: Ixora coccinea Linn may be a species of the genus Ixora, that belongs to the Rubiaceae. The present study indicates the utilization of Ixora coccinea flower extract as an acid base indicator in several sorts of acid base titrations. The equivalence point that was obtained by the flower extract was found to be coincident with the equivalence point obtained by standard indicators. The results obtained by the flower extract matched with the result obtained by standard indicator just in case of weak acid and weak base titration. This natural indicator was found to be a really useful, eco

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Waterval, Eugene, Tara Hunt, and Daleen Penoyer. "Nurses’ Decision-Making and Confidence With Titration of Vasoactive Medication." American Journal of Critical Care 34, no. 4 (2025): e24-e31. https://doi.org/10.4037/ajcc2025332.

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Background Critical care nurses are responsible for titration of intravenous vasoactive medications. Before the 2017 publication of The Joint Commission standards requiring nurses to titrate medications within specific protocols, nurses mostly titrated medications autonomously according to clinical judgment. Little is known about how nurses make decisions when titrating vasoactive medications. Additional research on this area of nursing practice is needed to optimize patient outcomes. Objectives To better understand critical care nurses’ practices, perceptions, and decision-making processes wh

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Papanastasiou, Georgios, and Georgios Kokkinidis. "Development of Iterative Methods for the Exact Determination of Acid Dissociation Constants and Specific Reaction Rates in Various Ionic or Electrochemical Systems. A Review." Collection of Czechoslovak Chemical Communications 68, no. 8 (2003): 1345–78. http://dx.doi.org/10.1135/cccc20031345.

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Theory and iterative methods for analysis of potentiometric titration data are presented in this paper. The methods concern titrations of (i) weak monoprotic acids, (ii) mixtures of weak acids with their conjugate bases (buffer solutions), (iii) mixtures of two monoprotic acids, (iv) solutions of polyprotic (di- and triprotic) acids with overlapping ionisation steps, and (v) mixtures of two diprotic acids. Using equations derived without approximations and data exclusively resulting from the buffer region of a titration curve, it is possible to extract the accurate values of the concentration(

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Tombácz, Etelka, Dániel Nesztor, Márta Szekeres, Hans Lewandowski, Erwin Klumpp, and Renáta Gerencsér-Berta. "Protolytic Reactions at Electrified TiO2 P25 Interface: Quantitative and Thermodynamic Characterization." Molecules 30, no. 3 (2025): 696. https://doi.org/10.3390/molecules30030696.

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Protolytic reactions on the surface of a titania photocatalyst (TiO2 P25 containing chlorine impurities) were studied using potentiometric and calorimetric acid-base titration. The impurity was removed by either washing or heat treatment. The efficiency of purification was tested by chlorine (TOX) analysis and acid-base titration. Common intersection points of −0.023 and −0.021 mmol/g were obtained for the original and 400 °C heat-treated samples, which are in good agreement with the measured TOX value of 28 mmol/kg. The point of zero charge of the purified sample was determined to be 6.50. Ti

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Cassedanne, Jeanníne Odette, and Hamílcar Freire de Carvalho. "Dosagem de chumbo em pequenas quantidades nos minerais." Anuário do Instituto de Geociências 14 (December 1, 1991): 41–43. http://dx.doi.org/10.11137/1991_0_41-43.

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This study describes a lead volumetric titration in minerals. Complexometric accumulation titrations are used and a previous lead separation as chloride is necessary. In the range of 10 to 50 mg of metal, a precision of 0,5 to 0,04% is reached, with a good reproductibility.

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Prasad, S., V. D. Leite, R. A. C. Santana, and E. A. Medeiros. "Electrometric studies on formation of cerium vanadates as a function of pH." Eclética Química 31, no. 2 (2006): 31–38. http://dx.doi.org/10.1590/s0100-46702006000200005.

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The precise nature of the reaction between nitric acid and sodium ortho-vanadate solutions has been studied by means of electrometric techniques involving potentiometric and conductometric titrations. The well defined inflections and breaks in the titration curves confirm the existence of the anions, pyro-V2O7(4-), meta-VO3- and poly-H2V10O28(4-) corresponding to the ratios of VO4(3-):H+ as 1:1, 1:2 and 1:2.6 in the neighborhood of pH 10.5, 7.4 and 3.6, respectively. The interaction of cerium(III) nitrate with sodium vanadate solutions, at specific pH levels 12.4, 10.5, 7.4 and 3.6 was also st

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Watanabe, N., J. Levri, V. Peng, S. M. Scharf, and M. Diaz. "0634 Volume-Assured Pressure Support is Effective Treatment for Obstructive Sleep Apnea Patients Who Failed CPAP Titration." Sleep 43, Supplement_1 (2020): A242. http://dx.doi.org/10.1093/sleep/zsaa056.630.

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Abstract Introduction Obstructive sleep apnea (OSA) is a common disease, often treated using continuous positive airway pressure (CPAP). In many cases, patients fail an attended CPAP titration study, often due to inadequate control of AHI, and treatment-emergent central apneas as CPAP is increased. Here, we report our experience using volume-assured pressure support (VAPS) for these patients. Methods We retrospectively reviewed records of 45 adults who had OSA diagnosed on polysomnography (PSG) in whom CPAP titration had failed. In these patients, VAPS-AE (adjustable expiratory pressure) titra

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Duyar, Sezgi Şahin, Deniz Çelik, and Selma Fırat. "The Evaluation of APAP Titration Results: Good Titration Versus TECSA and Unacceptable Titration." Turkish Thoracic Journal 22, no. 6 (2021): 450–58. http://dx.doi.org/10.5152/turkthoracj.2021.21058.

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Vambhurkar, G., A. Jagtap, A. Gavade, et al. "ETHANOLIC EXTRACT OF ARISTOLOCHIA BRACTEOLATA FLOWER AS A NATURAL INDICATOR FOR ACID-BASE TITRATION." INDIAN DRUGS 56, no. 03 (2019): 77–79. http://dx.doi.org/10.53879/id.56.03.11502.

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In acid-base titration or acid-base neutralization reaction the change in color due to change pH of the solution is caused due to a third substance which is termed as acid-base indicator or pH indicator. Every indicator shows different range of colors at different pH ranges. Synthetic indicators have been widely employed as indicators in acid-base titrations; however, due to environmental pollution, availability and cost, natural compounds are best alternates. Natural pigments in plants are highly colored substances and may show sharp color changes with variation in pH. In the present study an

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HE, Qing-Yu, Anne B. MASON, and Robert C. WOODWORTH. "Spectrophotometric titration with cobalt(III) for the determination of accurate absorption coefficients of transferrins." Biochemical Journal 318, no. 1 (1996): 145–48. http://dx.doi.org/10.1042/bj3180145.

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A rapid and sensitive technique, involving difference spectral titration with cobalt(III), to measure the ϵ values of chicken ovotransferrin, human serum transferrin, the N-lobe of human transferrin and several single point mutants is reported. The resulting ϵ values were compared with the values calculated from the equation proposed by Pace, Vajdos, Fee, Grimsley and Gray [(1995) Protein Sci. 4, 2411–2423]. The titrations with cobalt feature sharp break-points and do not destroy the protein samples. The choice of buffer was found to be important, depending on the metal-binding avidity of the

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