Determination of technetium by atomic absorption spectrophotometry

Low-temperature secondary positive ion mass spectrometry of neat and argon-diluted organic solids

“…Since in these instances the species of interest cannot be easily transferred to the gas phase without change, standard mass spectrometry is of little direct use and methods such as field desorption ( I ) have been investigated. In recent years, a limited amount of exploratory work on organic solids using plasma desorption mass spectrometry (PDMS) (2, 3) and secondary ion mass spectrometry (SIMS) (4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) has been performed in several laboratories and appears t o show considerable promise. Even at the higher temperatures, there is no evidence that any of the observed SIMS signal originated in the gas phase (see Discussion).…”

Determination of technetium by graphite furnace atomic absorption spectrometry

“…Scans for neon fill gas are similar. Wavelength scans were also made in the vicinity of the 403.1-and 429.7-nm lines with argon fill-gas, since technetium absorbance lines have been reported at these wavelengths (6). Much lower absorbance readings were obtained when technetium solutions were analyzed at the 260.9-, 403.1-, or 429.7-nm wavelengths.…”

“…One approach which can meet these requirements is atomic absorption analysis, since the technique is highly sensitive and yet very few elements interfere. An atomic absorption procedure for technetium was developed by Hareland et al (6). It involves use of the acetylene-air flame and yields a sensitivity of 3 gg/mL of sample solution.…”