Detail of "10521-91-2"

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The ac impedance study on chloride ion sensitive polymeric membranes

The ac impedance study on chloride ion sensitive polymeric membranes. Maruizumi, T.; Miyagi, H.; Takata, Y. (Cent. Res. Lab., Hitachi Ltd., Tokyo 185, Japan). Anal. Chem. Symp. Ser., 17(Chem. Sens.), 533-8 (English) 1983. CODEN: ACSSDR. ISSN: 0167-6350. DOCUMENT TYPE: Journal CA Section: 72 (Electrochemistry) Section cross-reference(s): 76, 79 This a.c. impedance study was made to characterize Cl--sensitive polymeric membranes. The membranes consisted of (1) a quaternary ammonium salt as the Cl- exchanger, (2) poly(vinyl chloride) as the membrane matrix, and (3) a plasticizer. The abs. impedance and phase angle were measured in the frequency range 5-200 kHz. A graphic representation of the complex impedance, a Cole-Cole plot, was plotted immediately after each expt.There are some commonly used reagents with their cas registry numbers 112-72-1 and 10521-91-2 in this article. The membrane plasticized by phenylalkyl alc. showed 2 sep. semicircles, while a collapsed pattern was obsd. for the membrane plasticized by an aliph. alc. For a deteriorated membrane the semicircle for the ion exchange process was smeared out and the abs. impedance increased 2 times compared to a fresh membrane. .

Investigation of quantitative relationship between adsorbed amount of solute and solvent concentration at relatively high solute concentration by frontal analysis in RPLC

Investigation of quantitative relationship between adsorbed amount of solute and solvent concentration at relatively high solute concentration by frontal analysis in RPLC. Wang, Yan; Geng, Xin-Du; Zebolsky, Don M. (Institute of Modern Separation Science, Province Key Laboratory of Modern Separation Science, Northwest University, Xi'an 710069, Peop. Rep. 60-12-8 and 10521-91-2 are also occured in this study. China). Chinese Journal of Chemistry, 21(10), 1339-1343 (English) 2003 Science Press. CODEN: CJOCEV. ISSN: 1001-604X. DOCUMENT TYPE: Journal CA Section: 66 (Surface Chemistry and Colloids) Section cross-reference(s): 80 In previous paper a new adsorption isotherm which relates the amt. of solute absorbed to the solvent concn. is proposed and simplified, and it only can be used at lower solute concn. The scope of the new adsorption isotherm is extended and the expressions with 3 and 4 parameters are obtained. The equations with multi-parameters are valid when the adsorbed amts. are larger and show nonlinear logarithmic relations. Tests with a homolog of arom. alcs. by frontal anal. in reversed phase liq. chromatog. demonstrate that the exptl. results fit those equations well. The predicted values by the multi-parameters fit the exptl. values well also. The parameters have phys. meaning only for the 2-parameter equation for the arom. alcs. .