Titrimeric Determination of Some Amine Oxides and and Phosphine Oxides in Acetic Anhydride.

Wimer, D. C.

doi:10.1021/ac60187a053

Cited by 23 publications

(7 citation statements)

References 12 publications

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“…Second, although the predominate mode of addition of monomers units is head-to-tail, 10 to 15% of the monomer units are inverted, producing head-to-head and tail-to-tail sequence isomers (2). Since the cis isomer does not exceed 20% in typical polychloroprenes, nonlinearities introduced by these additional types of structural isomerism should have at most a small effect on the analysis, but no independent method of verification and has been used to analyze a wide range of nitrogenous bases including amines (1), pyrazines (3), amides (8), and amine oxides (9). Short chain quaternary ammonium halides such as tetra-re-butylammonium bromide have been successfully determined in acetic anhydride using perchloric acid in acetic acid as titrant (7) but no procedure is reported for directly titrating the high molecular weight ammonium halides and methyl sulfate salts now of general commercial interest.…”

mentioning

confidence: 99%

Nonaqueous Titration of High Molecular Weight Nitrogen Compounds.

Puthoff¹,

Benedict²

1964

Anal. Chem.

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confidence: 99%

Nonaqueous Titration of High Molecular Weight Nitrogen Compounds.

Puthoff¹,

Benedict²

1964

Anal. Chem.

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“…Most of the wet methods for amine oxides make use of their basicity. They can be titrated with standard hydrochloric or perchloric acid (14). One of the main analytical problems is differentiation between the precursor amine and amine oxide.…”

Section: Instrumental Methods For Amine Saltsmentioning

confidence: 99%

The analysis of cationic surfactants

Metcalfe¹

1984

J Americ Oil Chem Soc

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Long-chain cationic surfactants have become a very important class of industrial chemicals. These useful oleochemicals are usually based on vegetable oils and animal fats. They have many applications which include fabric softeners, antistatic agents, organo clays, emulsifiers, germicides, flotation chemicals, corrosion inhibitors and foam depressents. The fatty quaternary ammonium compounds (quats) are by far the most important of this group of the commercial compounds. However, the fatty amine salts and amine oxides must also be classified as cationic surfactants. Although not as widely used as quats, they have special properties and uses which are often unique and useful. The various analytical methods used for these chemicals serves several objectives, including routine quality control, identification and characterization, determination in mixtures and formulations, determination at use level, and determination in the environment. In general, the objective of the analysis will determine what method will be used. Routine quality control procedures will most often use wet methods or some simple instrumental techniques. Identification and characterization of unknown cationic samples often require the most sophisticated of instrumental and chromatographic methods. Use level and environmental samples usually must be analyzed using the most sensitive methods. Often, colorimetric analysis is adequate. These samples often must undergo rigorous separation and clean-up techniques before the method of choice can be used. The methodology for the analysis of fatty amines, amine oxides and quaternary ammonium compounds is reviewed with the various analytical objectives in mind. However, the main emphasis is placed on the quats.

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“…21 The weak bases which cannot be determined visually or potentiometrically, either in acetic acid or in propionic acid, can be titrated in acetic anhydride with perchloric acid in acetic acid. 22,23 In order to estimate sulphur, it has been found that mercapto group in thioglycolic acid, thiourea and thiosemicarbazide can be oxidized in the lead tetra-acetate to various oxidation states depending on the nature of the medium. In glacial acetic acid these compounds were oxidized to disulphides.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Arsenic(iii) in Organic Arsines and Its Complexes Using Potassium Bromate and Potassium Iodate as Oxidants

Sharma

Naushad

et al. 2016

J. Chil. Chem. Soc.

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Oxidimetric quantitative determination of arsenic(III) in organic arsines and their complexes with tin(IV) and mercury(II) has been attempted visually, potentiometrically and conductometrically. In each method, standard potassium bromate and potassium iodate oxidants were used in absolute alcohol medium. In these methods, known weight of organic arsines was dissolved in a mixture of absolute alcohol and concentrated hydrochloric acid. The resulting solution was titrated with standard potassium bromate/iodate solutions as oxidants using CCl 4 as indicator in visual method. In case of conductometric and potentiometric titrations using potassium iodate/bromated, the results obtained were comparable to visual method. The percentage of arsenic for 1/10 mol L -1 KIO 3 and 1/10 mol L -1 KBrO 3 were found to be 11.73% and 11.71%, respectively. It led to the authenticity of the results obtained by visual method. 10 mg to 20 mg of the compound under test gave the results within the standard deviation error. The estimation of arsenic (III) was achieved within half an hour.

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Titrimeric Determination of Some Amine Oxides and and Phosphine Oxides in Acetic Anhydride.

Cited by 23 publications

References 12 publications

Nonaqueous Titration of High Molecular Weight Nitrogen Compounds.

Nonaqueous Titration of High Molecular Weight Nitrogen Compounds.

The analysis of cationic surfactants

Estimation of Arsenic(iii) in Organic Arsines and Its Complexes Using Potassium Bromate and Potassium Iodate as Oxidants

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