Reference

Stability of aqueous perchlorate formulations

Stability of aqueous perchlorate formulations. Williams, Craig C. (Med. Cent., Univ. Cincinnati, Cincinnati, Ohio, USA). Am. J. Hosp. Pharm., 34(1), 93-5 (English) 1977. CODEN: AJHPA9. DOCUMENT TYPE: Journal CA Section: 63 (Pharmaceuticals) I.v. KClO4 [7778-74-7] solns., oral NaClO4 [7601-89-0] solns. contg. sorbitol, and oral NaClO4 solns. in cherry syrup were stable for .gtoreq.9 months as detd. gravimetrically by pptn. of the ClO4- with tetra-n-pentylammonium bromide. Since KClO4 tends to crystalize upon refrigeration, as does the paraben preservatives used in the cherry formulation, these prepns. should not be refrigerated. However, NaClO4 does not ppt. upon refrigeration.

The double layer at the mercury/acetone interface at large positive charges

The double layer at the mercury/acetone interface at large positive charges. Borkowska, Zofia (Inst. Phys. Chem., Pol. Acad. Sci., Warsaw, Pol.). J. Electroanal. Chem. Interfacial Electrochem., 79(1), 206-10 (English) 1977. CODEN: JEIEBC. DOCUMENT TYPE: Journal CA Section: 72 (Electrochemistry) Section cross-reference(s): 66 The elec. double layer in acetone [67-64-1] was studied by capacitance measurements, and the accessible potential range in solns. of several weakly adsorbed electrolytes was established. The double layer capacitance curves were plotted in 0.2M KPF6 [17084-13-8], LiNO3 [7790-69-4] and 0.1-1M NaClO4 [7601-89-0] solns. using an a.c. Schering type impedance bridge. Zero-charge potentials were detd. for each soln. using a streaming Hg electrode. Potentials were measured vs. an aq. 1M LiCl calomel electrode. Addnl., the half-wave potential of cobalticinium in each soln. was measured. Acetone is another org. solvent with a low dielec. const. in which a water-like capacity hump was found at potentials pos. of the point of zero charge. As for many other org. solvents, the preferred orientation of the acetone dipole is with its pos. end towards Hg. Solvent reorientation phenomena are possibly responsible for the hump. However, at such pos. potentials, some sp. adsorption of anions likely occurs and the acetone hump is possibly of soln. ionic nature.