Thermolysis of Zinc Monosalicylaldoxime

Thermogravimetric Measurements

“…Interestingly enough, in neither of his papers (2, 7) does the thermogram indicated to be that of zinc monosalicylaldoxime correspond to the description given for it. A more detailed study by Rynasiewicz and Flagg (16) showed that zinc monosalicylaldoxime was stable from room temperature to 285°C., but that the plateau recorded by the thermobalance depended upon the initial water content. The thermolysis curve of a sample air-dried at room temperature to zero water content had a plateau from 25°to 285°C., and a partially dried sample with a water content of 50%: gave a plateau from 135°to 290°C.…”

Thermal Analysis

“…The salicylaldoxine method for determination of zinc (80) was proposed for abandonment (64) because no plateaus were found on the TGA curve (54). Subsequent reinvestigation of the chelate (191) showed that the thermogram was highly dependent on the water content of the material employed. The original rejection has been reconsidered (65).…”

Thermal Analysis. A Critique

“…If a. stable species exists, the probability of detection is greatly increased. Newkirk cites the work of Rynasiewicz and Flagg (23) on zinc monosalicylaldoxime, pointing out that by holding a partially dried sample at 135°C. for 1 hour constant weight to 290°C.…”