Metallo-Organic Precipitates in Inorganic Analysis

Abstract

The nickel, palladium, and bismuth derivatives of dimethylglyoxime were systematically investigated to determine the effects of concentration of test solution, method of precipitation, and presence of foreign ions. The electron microscope provides useful information concerning the effects of various condi-

Precipitation of Barium Sulfate: Investigation by Electron Microscopy

“…An attempt has been made in the present investigation to employ the electron microscope for the observation of precipitated particles of barium sulfate, both fresh and aged and both reasonably pure and highly contaminated, and to look for direct indication of the aging and the coprecipitation processes. The electron microscope has been used in the investigation of several other precipitation processes (1)(2)(3)(4), DIRECT MIXING OF REAGENTS Standard 0.1 M solutions of barium chloride and potassium sulfate were prepared, and the more dilute solutions of these reagents were then prepared by quantitative dilution. precipitation, one reagent solution was added drop wise to t he other.…”

Inorganic Gravimetric Analysis

“…Fisher and Simonsen (35) used the electron microscope to study variations in crystal form with conditions of precipitation. Precipitates of dimethylglyoxime with nickel and with bismuth were used, and the authors concluded that the appearance of the crystal should be used with caution for qualitative identification.…”