A pretreatment method to determine differences in adsorbed water by differential thermal analysis

McAtee, James L.; Thielmann, Vernon J.

doi:10.1016/0040-6031(74)80045-6

Thermochimica Acta

1974

DOI: 10.1016/0040-6031(74)80045-6

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A pretreatment method to determine differences in adsorbed water by differential thermal analysis

James L. McAtee

Vernon J. Thielmann

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1975

1976

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“…High pressure DTA was applied to the wool-water system at 40-140 psig at wool-water ratios of 0.7-5.0 (56) and irreversible endotherms were detected at 130-145 and 140-170 °C. The water binding index technique (212), relating bound to free H20 in foods and biological systems, was improved (211), but does not appear to.be very useful in inorganic systems (283).…”

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confidence: 99%

Thermal analysis

Murphy¹

1976

Anal. Chem.

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This review covers the major trends in thermal analysis from the previous review (303) to October 1975. In this period, several books have appeared. Volumes 2 (246) and 3 (247) of the "Atlas of Thermoanalytical Curves" have appeared and, while not in the reviewer's possession, volume 4 also is believed to be published. Books entitled "Thermal Analysis" have been published by Daniels (100) and Blazek (42). Wendlandt has issued the second edition of "Thermal Methods of Analysis" (437) and "Handbook of Commercial Scientific Instruments, Vol. 2, Thermoanalytical Techniques" (438). ''Thermal Analysis: Comparative Studies on Materials" (208) is the proceedings of a joint U.S.-Japan seminar held in Akron, Ohio, in April 1974. "Thermal Analysis", the three-volume proceedings of the Fourth ICTA held in Budapest in 1974, has been published (58) and contains 276 papers.C. B. Murphy received his B.S. and M.S. degrees from the College of the Holy Cross In 1941 and 1942, respectively. After three years of Navy duty, he returned to Holy Cross as a member of the Chemistry Department faculty. In 1952 he received his Ph.D. from Clark University. In the same year he joined American Cyanamld's Stamford Research Laboratory. After 10 years with General Electric's Advanced Technology Laboratories, he joined the Xerox Corp. as Manager of the Materials Analyses Area. He is now Manager of Toner Processing in the Xerographic Technology Dept.

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confidence: 99%

Thermal analysis

Murphy¹

1976

Anal. Chem.

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The Relationship between Structural Properties of Metal-Tris (Ethylenediamine) Montmorillonite and Their Behavior as Gas Chromatographic Packing Materials

Thielmann

1975

Clays and clay miner.

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Abstract--The tris(ethylenediamine) complex cations of chromium(III), cobalt(III), and copper(II) were exchanged onto sodium montmorillonite. The resulting cation exchanged clays were dried, ground, sieved and the 50/80 mesh size was retained for use as column packing material to be used in gas chromatographic analysis of light hydrocarbons and oxides of nitrogen. Studies indicated that the hydrocarbons were following a sieving action whereas the nitrogen oxides were involved in a surface adsorption process.The changes in door-spacing and surface area of tris(ethylenediamine)Cr(III)-montmorillonite were correlated with the changes in gas chromatographic retention time for the light hydrocarbons and the oxides of nitrogen.Retention time was obtained for the 100 per cent exchanged montmorillonites containing cations of tris(ethylenediamine)Cr(III), tris(ethylenediamine)Co(III), and tris(ethylenediamine)Cu(II). A comparative study of the d00~-spacing and surface area.of the three clays is shown to be directly related to the retention time.Heating effects were studied to determine thermal stability. Changes in retention times were compared with various structural changes. DTA and heatin~oscillating X-ray powder diffraction analysis were used to help explain the relationship between retention time and structural change.

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A pretreatment method to determine differences in adsorbed water by differential thermal analysis

Cited by 2 publications

References 1 publication

Thermal analysis

Thermal analysis

The Relationship between Structural Properties of Metal-Tris (Ethylenediamine) Montmorillonite and Their Behavior as Gas Chromatographic Packing Materials

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