Investigations on nature of re-volatilization from atom trap surfaces in flame AAS

Determination of lead by hydride generation atom trapping flame atomic absorption spectrometry

“…In atom trapping hydride generation, however, the peak height sensitivity is dependent on both trapping and atomization efficiency. It was proposed that analytes accumulate either as metals or oxides on the surface of silica or quartz traps, 38,39,54 suggesting that direct contact of volatile hydride with the surface of the atom trap cell is essential for a certain period of time to achieve efficient collection. While the argon flow rate determines the duration of the contact, the flame conditions (e.g., temperature and composition) impact on the stability of trapped species.…”

“…38 Trapped species were atomized either by rapidly increasing the fuel flow rate or by aspirating an organic solvent to the flame. 38,39 Initial studies of the atom trapping approach for the determination of hydride forming elements by atomic spectrometry involved in situ trapping in graphite furnaces. 40 Successful studies interfacing hydride generation to silica or quartz tube atom traps have been reported only recently.…”

On-line Hyphenation of Hydride Generation with in situ Trapping Flame Atomic Absorption Spectrometry for Arsenic and Selenium Determination

“…Korkmaz et al 9 investigated the nature of revolatilization from atom trap surfaces in flame by AAS. Analytes Au, Bi, Cd, Mn and Pb were trapped on a water-cooled, U-shaped silica trap or a slotted silica tube trap and revolatilized by organic solvent aspiration.…”

Vapor generation and atom traps: Atomic absorption spectrometry at the ng/L level

“…Using an inserted thermocouple, the temperature inside the quartz tube was measured. The organic solvent was then aspirated into the flame, not in a small and discrete volume, but in a continuous fashion for 60 s. This experiment was performed for several analytes, such as Bi, Au, Cd, Pb and Mn, using acetonitrile, n-hexane, methylethyl ketone and IBMK [31]. The measured temperatures were lower than those experienced in an SQT-AT since there are no slots on the quartz tube used in these measurements.…”

“…Its introduction as a novel device [26][27][28]30], studies regarding revolatilization mechanisms [31] and interferences [32] have been reported.…”