Analysis of Phosphorus Compounds
About: This article is published in Analytical Chemistry.The article was published on 1954-11-01. It has received 63 citations till now. The article focuses on the topics: Phosphorus.
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TL;DR: In this article, the interaction between ammonium polyphosphate and pentaerythritol in thermally degrading mixtures was investigated. But the degradation process was not shown to be independent of the experimental conditions.
216 citations
TL;DR: On heating, ammonium polyphosphate eliminates ammonia and water in two successive steps as mentioned in this paper, and the final product of degradation is characterised by a crosslinked P-O-P structure formed by elimination of H2O between P-O groups freed by the evolution of NH3.
199 citations
TL;DR: A comparison study of hydrolytic Degradation in Inorganic Polyphosphate Chemistry and its Applications in NMR, X-ray Diffraction and x-ray Energy-Dispersive Analysis.
Abstract: 5. Inorganic Polyphosphate Chemistry 4699 5.1. History 4699 5.2. Definition 4699 5.3. Formation 4699 5.4. Hydrolytic Degradation (Hydrolysis) 4699 5.5. Analytical Methods 4700 5.5.1. Chromatography 4700 5.5.2. Hydrolytic Degradation Assay 4700 5.5.3. Titration 4700 5.5.4. Colorimetry 4700 5.5.5. Solubility Fractionation 4700 5.5.6. Gel Electrophoresis 4700 5.5.7. P NMR 4700 5.5.8. Infrared 4700 5.5.9. X-ray Diffraction and X-ray Energy-Dispersive Analysis 4700
193 citations
TL;DR: In this paper, the authors studied the chemical reactions responsible for the intumescent behavior of pentaerythritol diphosphate (PEDP) and discussed the mechanism of formation of this char.
68 citations
TL;DR: Chilling chicken carcasses overnight in slush ice containing 3 and 8% polyphosphates lengthened subsequent shelf-life 17 and 25%, respectively, and inhibited the growth of nonfluorescent pseudomonads in a synthetic medium.
Abstract: Both commercial polyphosphates and equivalent mixtures of chemically pure polyphosphates inhibited the growth of nonfluorescent pseudomonads in a synthetic medium. Fluorescent strains grew after a short lag. Inhibition was not caused by high pH, but rather by chelation of metal ions essential to the growth of the bacteria. Mg++ and the natural competitive chelators, pyoverdine and bacteriological peptone, reversed the inhibition. Chilling chicken carcasses overnight in slush ice containing 3 and 8% polyphosphates lengthened subsequent shelf-life 17 and 25%, respectively. Chickens held in continuous contact with 3 and 8% solutions of polyphosphates during storage at 2.2 C kept 17 and 67% longer, respectively. Only fluorescent strains developed in the presence of 3 and 8% polyphosphates. Chickens held in antiseptic ice containing 8% polyphosphates kept 60% longer than did those in water ice.
67 citations
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48 citations
TL;DR: The history of arseniates and pyrophosphates can be traced back to the discovery of the extraordinary phosphates of lime by Berzelius and the observation of the identity of form of the corresponding arseniates by Mitscherlich as discussed by the authors.
Abstract: No classes of salts have more liberally rewarded investigation than the arseniates and the phosphates. Witness the discovery of the extraordinary phosphates of lime by Berzelius ; the observation of the identity of form of the corresponding arseniates and phosphates by Mitscherlich, and the doctrine of isomorphism to which that observation led; the discovery by the same chemist of two biphosphates of soda, agreeing in composition but differing in form; and lastly, the discovery of the pyrophosphates by my friend and townsman Mr. Clark. Much, however, still remains to be done to complete the history of these interesting salts.
44 citations
TL;DR: In this paper, the application of the potentiometric method to both analytical and general research work is discussed, with particular emphasis on automatic apparatus developments tending to simplify the use of the method.
Abstract: Potentiometric titration procedure is described briefly and the application of the potentiometric method to both analytical and general research work is discussed. Instrumentation for the potentiometric titration is reviewed with particular emphasis on automatic apparatus developments tending to simplify the use of the potentiometric method. An instrument, capable of automatically performing and plotting potentiometric titrations, and adaptable to a variety of electrode systems, is described. The construction and operating principle of the instrument, as well as its calibration, method of use, and performance characteristics, are described in detail.
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