Titrations nonaqueous

A more thorough discussion of nonaqueous titrations, with numerous practical examples, is provided in the following text. 

Finally, the techniques of nmr, infrared spectroscopy, and thin-layer chromatography also can be used to assay maleic anhydride (172). The individual anhydrides may be analyzed by gas chromatography (173,174). The isomeric acids can be determined by polarography (175), thermal analysis (176), paper and thin-layer chromatographies (177), and nonaqueous titrations with an alkaU (178). Maleic and fumaric acids may be separated by both gel filtration (179) and ion-exchange techniques (180). 

Analytical and Test Methods. Measurement of the sohdification point using a highly sensitive thermometer and of APHA color by comparison of molten samples to APHA standards is straightforward. Specific impurities are measured by gas chromatography. A nonaqueous titration is used to determine phthahc acid content. 

Cupferron Nitroso-R-salt 688 Nitrous acid removal of. 514 Nonaqueous titrations 307 indicators for, 284 solvents for. 283... 

Application of the Nonaqueous Titration Method to Organic Compounds of Ordnance Interest , PATM 31 (1953) 30b) Ibid, A ... 

Nonaqueous Titration Method for the Determination of the Purity of Ammonium Picrate ,... 

Nonaqueous Titration Methods. See under Nitrogen Determination in Energetic Materials in this Vol... 

Aromatic amines can be determined by measuring the difference of their UVV absorption spectra, taken at identical concentrations but different pH of the solution. Also, standard mixtures and samples of the amines isolated from coke processing products were tested LOD 0.1-1 ppm. The procedure is potentially useful for waste waters and industrial effluents, where techniques such as GC and nonaqueous titrations may prove difficult to apply333. A determination of certain metabolites symptomatic of pancreatitis... 

Amines are converted quantitatively to dithiocarbamates (reaction 29), that can be determined by nonaqueous titration with Ce(IV) accuracy 0.8%, RSD 0.7%391. 

Refs l)K.Van Keuren, "A Procedure for Chemical Analysis of Composition A-3 , NAVORD Report 1781, US Naval Ordnance Laboratory, White Oak, Md. (1951) la)S.M. Kaye, PATR 1936 (1953) (Nonaqueous titration method for detn of RDX content in Comp A-3) 2)Anon, Military Explosives , TM 9-1910 (1955), 271 (Identification of Composition A-3) 3)Purchase Description X-PA-PD-940 (1956) (Karl Fischer moisture detn) 4)Federal Test Method Std No 141 (1958), Method 4082 (Karl Fischer moisture detn) 4a)C.C.Jamison, "Determination of Nitrogenous Coumpounds of Ordnance Interest by Chromous Chloride Reduction , PicArsn, FRL TechMemo ACS-3-60 (I960) 5)U.S. 

The Development of Nonaqueous Titration Method for the Determination of the RDX Content of Composition C-4", PATR 1958 (1953) 3)Anon, "Military Standard Explosive Sampling Inspection and Testing", MIL-STD-650 (1962) 4)US Military Spec MIL-C-45010A(MU)... 

There existed up to June 1965, twenty seven methods for the determination of RDX HMX (Ref 6). One of the methods recommended for consideration is the nonaqueous titration method given in Ref 5. By this method RDX can be detd in th e presence of as much as 80% HMX... 

If the objective is to fingerprint surface acidity (so that one acidic solid can be distinguished more clearly from another), the nonaqueous titration method (26) would be appropriate. The original method could be made more selective for titration of Br0nsted acids by choosing recently recommended indicators (21) and using a sterically hindered amine (54) as the basic reagent. However, even an improved indicator method may have its drawbacks a sterically hindered amine is not perfectly selective,... 

Nonaqueous titration of berbamine in acetone or Ac20-HOAc has been reported (312). The acid-base behavior of thalicarpine has been studied, and a quantitative determination by titration in ethylene glycol has been devised (313). 

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