Atomization in graphite-furnace atomic absorption spectrometry. Peak-height method vs. integration method of measuring absorbance. Heated Graphite Atomizer 2100

Evaluation of pyrolytic-graphite-coated tubes for graphite furnace atomic absorption spectrometry

“…0 Defined as the slope of the analytical working curve; the weight of element in grams which gives a peak absorbance of 0.0044 or an integrated absorbance of 0.0044 absorbance X second. mum to 1/e of this value (1, 5)) and atomization times (the time taken for the absorbance signal to rise from the baseline to its maximum value (5,6)), obtained for the elements in both tubes, are presented in Table IV. In each case, the reported values are those obtained under optimum conditions both for the peak and the integration modes of measurement.…”

“…In addition, a number of tubes which had been coated with pyrolytic graphite according to the procedure described by Manning and Ediger (4), were supplied by the Perkin-Elmer Corporation. All other instrumentation (integration control unit and detector-recorder system) has been described elsewhere (5,6).…”

One-step determination of lead over a higher linear range by an artificial neural network after air-assisted liquid–liquid microextraction coupled to flame atomic absorption spectrometry

“…There are two strategies to solve the above inconvenience. The rst one involves experimental approaches such as highpressure atomizers, 20,21 quantitation at non-resonant absorption lines 22 and non-stop gas conditions during atomization. 23 The second strategy applies mathematical models such as polynomial expressions 24 and articial neural networks (ANN).…”

Insight Into Electrothermal Atomization Mechanism of Several Transition Metals (Cr, Cu, Mn, Ni, Zn) in Uranium and Thorium Matrices: GFAAS Study

“…The electrothermal atomization mode, however, makes complete description of the atom formation mechanism more difficult due to an increase in the number of interfering species, which are chemical in nature. The studies on atomization processes reported in the literature (15)(16)(17)(18)(19) are all carried out on analytes with water or weak acids with a zirconium matrix (6). However, the reaction mechanism on the basis of activation energies (E a ) calculation using Arrhenius plots is not yet reported for Cr, Mn, Ni, Cu, and Zn in uranium and thorium matrices using the GFAAS technique.…”