Inorganic Microchemistry

Abstract

Fobthe past two years, inorganic microchemistry has progressed steadily, but without spectacular innovations. Anyone following the literature closely must be impressed with the growing interest in microchemical and ultramicrochemical methods.

Determination of sulfur dioxide in stack gases by ultraviolet absorption spectrometry

“…The presence of the bicarbonate buffer reduces but does not remove the interference. Sulfamic acid has been mentioned in the literature (12) as a means of removing nitrogen oxides which, when present in concentrations exceeding 2 ppm in solution, cause a fading of the red-violet color in the West and Gaeke pararosaniline method for SO2. Sulfamic acid is expected to decompose nitrite to nitrogen gas.…”

“…These include the polarographic (1, 2), conductometric (3, 4), coulometric (3,5), and colorimetric (6)(7)(8)(9) finishes. In the West and Gaeke method, which is endorsed by the Environmental Protection Agency as the reference method for determination of SO2 in ambient air (6,(10)(11)(12), SO2 is removed by bubbling air through a tetrachloromercurate solution, adding acidified pararosaniline dye and measuring absorbance at 548 nm. The method is sensitive to air concentrations as low as 25 µg SO2/ m3.…”

Inorganic Microchemistry

“…Many interesting contributions were omitted in an attempt to present a summary that would show the trend in the field without burdening the reader with all the details. The review is continuous from that published in 1962 (167) and extends through December A number of excellent reviews have appeared during the past two years. Benedetti-Pichler (£0) reviewed progress in qualitative inorganic analysis, and Maurmeyer contributed a companion review of quantitative inorganic methods (107, 108).…”