Analysis of Volatile Inorganic Fluorides by Gas Liquid Chromatography.

Hamlin, A. G.; Iveson, Gordon.; Phillips, T. R.

doi:10.1021/ac60206a019

Cited by 30 publications

(11 citation statements)

References 10 publications

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“…(3) The rise X was replaced by a dip when N2 was used as carrier gas in place of He. (4) The area under the rise X increased with temperature and with percentage loading of the liquid phase. From these facts, the rise X would appear attributable to the presence of a reaction product of UF6 with liquid phase-probably hydrogen fluoride.…”

Section: Resultsmentioning

confidence: 95%

Gas Chromatography of Uranium Hexafluoride at Low Temperatures

Tsujimura

Fujisawa

Itô

1968

Journal of Nuclear Science and Technology

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Gas chromatography of UF 6 at low temperature was studied with the use of columns of polytrifluoromonochloroethylene oils as liquid phase. The dependence of retention time and HETP of UF 6 on (1) degree of polymerization of oils, (2) liquid phase loading, and (3) kinds of solid support were studied in the temperature range between -10° and 40°C, and the most favorable conditions for quantitative analysis of UF 6 are discussed.The relation between the gas chromatographic characteristics of the columns and the B.E.T. surface area of the solid support has been briefly examined.

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Section: Resultsmentioning

confidence: 95%

Gas Chromatography of Uranium Hexafluoride at Low Temperatures

Tsujimura

Fujisawa

Itô

1968

Journal of Nuclear Science and Technology

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“…The lowest concentration of polar fluoride in water systems was successfully determined using a developed system. Volatile inorganic fluorides, especially uranium hexafluoride, chlorine trifluoride, chlorine, hydrogen fluoride and many more reactive components, are determined using gas-liquid chromatography with a special apparatus made of brass and copper protected by electroless nickel plating (Hamlin et al 1963).…”

Section: Analytical Techniques For the Determination Of Fluoridementioning

confidence: 99%

Treatment of fluoride-contaminated water. A review

Kumar¹,

Suganya²,

Srinivas³

et al. 2019

Environ Chem Lett

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Delivering the right amount of fluoride to drinking water protects the teeth from decay and reduces the risk of cavities. Nonetheless, fluorosis has been diagnosed as the result of excessive exposure of fluoride, which induces brain impairment, muscle disorders and hyperactivity. Fluoride ingestion during the formation of the tooth enamel is the main reason for fluorosis, which is characterized by hypomineralization. Dissolution of fluoride-containing rock minerals contributes to naturally occurring fluoride contamination in water. The intentional addition of fluoride to water in dental care is alarming in growing countries such as India. This article reviews the origin of fluoride, the analysis of fluoride derivatives and the technologies to remove fluoride from water. The manuscript presents adsorption techniques for fluoride removal, using different types of adsorbents. The adsorption capacities of adsorbents under various conditions, such as contaminant concentration, adsorbent dosage, time, pH and temperature, are presented. Adsorbent types include alumina, zeolites, organic waste, shell-based and carbon-based including graphite and carbon nanotubes. Defluoridation of water using clays and muds, modified activated alumina, chitosan derivatives and composites are also discussed.

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“…The charcoal was dried and degassed by passage of dry helium through the column for 24 hours at a temperature of 250°C. Three six-port gas sampling valves of the sliding plunger, 0ring type were constructed from brass which was subsequently nickel-plated according to the method of Gutzeit and Ramirez (10, 11). Both neoprene and Kel-F O-rings (Wilkens Instrument and Research, Inc.) were used in the valves.…”

Section: Chemicalsmentioning

confidence: 99%

“…The problems associated with analysis of the reactive gases, fluorine, chlorine, chlorine monofluoride and trifluoride, hydrogen fluoride, and uranium hexafluoride have been enumerated by Ellis et al (3)(4)(5) and Hamlin et al (11). Iveson and Hamlin (IS) developed instrumentation for the in-line gas chromatographic separation and analysis of certain corrosive interhalogen compounds in plant streams.…”

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confidence: 99%