Direct determination of aluminum content in seawater by electrothermal atomization-laser excited atomic fluorescence

Laser-induced fluorescence with an OPO system. Part II: direct determination of lead content in seawater by electrothermal atomization–laser-excited atomic fluorescence (ETA–LEAF)

“…The characteristics of the equipment as well as the experimental set-up have been described in Part I [1] and elsewhere [11] for the atomic fluorescence aspect. Our experiments were carried out in a pressurized, air-conditioned and 1-µ air-filtered room at 22°C.…”

“…As previously described in an ETA-LEAF study with a laser + OPO system [11], the coupling of a spectrophotometer with an intensified ICCD camera is of particular interest because it allows selection of the best excitationemission lines along with investigations on possible interferences, scattered light, and induced fluorescence from the matrix. In the study reported here, temporal resolution, optimization of the furnace conditions, selection of the best spectral parameters and of the light source energy were all considered in order to optimize the signal-tonoise ratio and lower the limit of detection.…”

Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry and related techniques

“…Two papers 469,470 from the same group were published on the use of laser induced atomic fluorescence for trace analysis of lead and aluminium in sea-water. In each case, excitation of fluorescence was performed with a pulsed Nd:Yag laser coupled to an optical parametric oscillator.…”

Atomic Spectroscopy

“…Pixley et al (58) reported an improved sensitivity for the case of Cs through the use of Doppler-free two-photon excitation with two properly aligned lasers with suitable wavelengths. Laser-excited AFS with atomization in a graphite furnace still is one of the most sensitive methods, as shown by the example of the determination of Al in seawater, reported by Le Bihan et al (59). When using hollow cathode primary radiation and an inductively coupled plasma (ICP) as the atom reservoir, Young et al (60) could show that axial viewing of the fluorescence signals in the ICP leads to an increase of the power of detection as compared to radial viewing.…”