Hot Tube Atomic Absorption Spectrochemistry

Abstract

A small, commercially available atomic absorption instrument is used with a heated graphite tube for the atomic absorption analysis of liquid and solid silver samples. Operating conditions of the furnace are described and a sensitivity of about 5 ng of silver is reported.

Matrix interferences in furnace atomic absorption spectrometry

“…Indeed, selectivity for particular functional groups must be seen as a decided advantage in any analytical technique. Such selectivity can be achieved in MIKES by controlled pyrolysis (8) or by use of selective ionization techniques, as in negative Cl/MIKES (9). In the latter approach only compounds of interest are ionized.…”

“…30 to 60 s without sputtering. The samples were dispensed with either a fixed volume micropipet (20 µ , Oxford Laboratories) or a variable volume micropipet (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) µL, Gilson Pipetman). Argon was used as the purge gas.…”

High gas temperature furnace for species determination of organometallic compounds with a high pressure liquid chromatograph and Zeeman atomic absorption spectrometer

“…(18) K. Fujita, Y. Arikawa, and S. Ganno, Nippon Kagaku Kaishl, 3, 463 (1975), (19) J. L. Waters, J. N. Little, and D. F, Morgan, J. Chromatogr. Sci., 7, 293 (1969).…”

Sample-loss mechanism in a constant-temperature graphite furnace

“…The furnace to be used to check Equation 8 must fulfill the following two conditions: (a) sample vapor loss due to convection must be eliminated or minimized, and (b) temperature of the heater tube over the duration of the observation pulse must essentially remain constant because the residence time depends on temperature. Both conditions are almost ideally fulfilled with the constant-temperature furnace developed at Montana State University (13,14). In addition, the analyte has a long residence time which makes the measurement more precise.…”