Determination of Water by Titration wth Coulometrically Generated Karl Fischer Reagent

Meyer, A. S.; Boyd, C.M.

doi:10.1021/ac60146a018

Cited by 73 publications

(35 citation statements)

References 8 publications

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“…The Karl Fischer titrations (KFT) were performed using a custom-built KF titrator [26,33]. The cell consists of a 100 mL beaker with a 4-hole rubber stopper.…”

Section: Karl Fischer Titrationsmentioning

confidence: 99%

“…Furthermore, some drawbacks of the KFT method have been reported for the determination of water in samples containing carboxylic acids or acid groups. Despite the appropriate corrections that can be performed in order to obtain accurate results, these drawbacks can result in systematic errors [26]. As a consequence, the analysis of water in protic ionic liquids (PRTILs) could be susceptible to such errors.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of water in room temperature ionic liquids by linear sweep, differential pulse and square wave cathodic stripping voltammetries

García-Mendoza

Aguilar

2015

Electrochimica Acta

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“…The Karl Fischer titrations (KFT) were performed using a custom-built KF titrator [26,33]. The cell consists of a 100 mL beaker with a 4-hole rubber stopper.…”

Section: Karl Fischer Titrationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of water in room temperature ionic liquids by linear sweep, differential pulse and square wave cathodic stripping voltammetries

García-Mendoza

Aguilar

2015

Electrochimica Acta

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“…The growth of gold oxide is strongly related to the experimental conditions such as the surface structure of the gold electrode [31,32], the roughness factor [17], potential, electrolyte, and etc. In alkaline medium and high polarization potentials, a further oxidation from AuO to Au 2 O 3 can occur [33].…”

Section: Formation Of Gold Oxide In Organic Solvents In Presence Of Wmentioning

confidence: 99%

“…Moreover, KF method is not reliable for determination of water in carboxylic acids, e.g. acetic acid, due to the esterification reaction that occurs with the primary alcohol (typically methanol) present in the titrants [16][17][18]. Other water determination methods including gravimetric IR and NMR spectroscopic techniques have also been applied for water determination in organic solvents [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Cathodic Stripping Determination of Water in Organic Solvents

et al. 2014

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The photocatalytic properties of titanium dioxide layers on metal sheets prepared via cold gas spraying have been investigated employing the ISO 22197‐2 standard test for acetaldehyde degradation in the gas phase. The contact between the TiO2 and the metal substrate can be described as a Schottky contact. A depletion region is formed at the semiconductor–metal interface leading to an enhanced separation of the photoinduced charge carriers. Thus, the lifetime of the e–/h+ pair is prolonged. The variation of process parameters, such as temperature and pressure, during the CGS preparation leads to different photocatalytic properties of the obtained TiO2 layers. Under high pressure and temperature even visible light active TiO2 coatings are prepared. The CGS technique allows the formation of thin TiO2 films without any binders exhibiting high photocatalytic activities in the same range as the pure powders employed for their preparation. Schematic diagram presenting the Schottky contact of an n‐type semiconductor and met al. Ef is the Fermi level, VB and CB are the valence and conduction band of the semiconductor, respectively. A proposed degradation pathway of acet‐aldehyde at the solid/gas interface is depicted. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…Both macro and mieroseale determinations can be performed using various methods of end point detection. The most frequently used methods are visual, dead-stop [9][10][11][12], eoulometrie [13][14][15][16], and potentiometric [17][18][19][20].…”

mentioning

confidence: 99%

Enthalpimetric assay of the water content of some oils and fats

Bark

Hadipranoto

1991

Journal of Thermal Analysis

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A rapid and accurate direct injection enthalpimetric (DIE) method has been developed for the determination of the water content in some oils and fats of commercial interest. The method combines the DIE and the Karl Fischer Reagent procedures and is calibrated against real samples whose water content have been determined by a standard distillation method using toluene as the immiscible solvent. The reproducibility and precision are equivalent to those of the standard method for the water content of materials such as soya bean oil. The procedure is able to determine water contents in compounds such as lard, which cannot be determined by the Dean & Stark method. Once calibrated, the proposed method can be operated routinely by semi-skilled personnel. The main advantages of the method are those of time and the cost of analysis.Chemically, the principal roles of water in foods include: (a) solvent, (b) reaction medium, (c) reactant, (d) antioxidant, (e)pro-oxidant, (f) a component of intramolecular structure and intermolecular structure [1]. Consequently, an ability to determine the water content is vital in ascertaining stability and thermal behaviour in connection with the processing and the packaging of foodstuffs.Many industrial food processes require reliable quantitative methods for the determination of moisture or water since water enters directly or indirectly into many chemical reactions. In response to this widespread need for reliable analysis, a wide array of methods [1][2][3] is presently available to cover the range of water content from parts per billion to high percentages by weight and volume, but all, even the widely used Karl-Fischer Reagent technique, suffer some limitations. Thus, a study of a new technique, such as Direct Injection Enthalpimetry is potentially of great interest to the analytical chemist.

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Determination of Water by Titration wth Coulometrically Generated Karl Fischer Reagent

Cited by 73 publications

References 8 publications

Analysis of water in room temperature ionic liquids by linear sweep, differential pulse and square wave cathodic stripping voltammetries

Analysis of water in room temperature ionic liquids by linear sweep, differential pulse and square wave cathodic stripping voltammetries

Cathodic Stripping Determination of Water in Organic Solvents

Enthalpimetric assay of the water content of some oils and fats

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