Advances in atomic spectroscopy. / Volume 2 by J. Sneddon PDF

By J. Sneddon

ISBN-10: 0080546374

ISBN-13: 9780080546377

ISBN-10: 1281026816

ISBN-13: 9781281026811

This sequence describes chosen advances within the sector of atomic spectroscopy. it's promarily meant for the reader who has a heritage in atmoic spectroscopy; compatible to the amateur and specialist. even if a commonly used and authorized approach for steel and non-metal research in various complicated samples, Advances in Atomic Spectroscopy covers a variety of fabrics. every one bankruptcy will thoroughly disguise a space of atomic spectroscopy the place swift improvement has occurred.

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Extra resources for Advances in atomic spectroscopy. / Volume 2

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787 nm. Taken with permission from Su et al. (1992). Laser-Excited Fluorescence 33 B. Wavelength Modulation Suet al. (1992) constructed a grazing incidence dye laser to employ wavelength modulation for background correction in graphite furnace LEAFS (Figure 1). 2 nm away from the analytical wavelength (background). Subtraction of the second measurement from the first provided a background-corrected signal. The effectiveness of wavelength modulation to correct for background signals produced by an aluminum chloride matrix in the determination of thallium was investigated (Figure 17).

80 Excitation wavelength, nm Figure 15. (continued) advantage that background correction was made simultaneously with the signal measurement, both signal and background being measured with every laser pulse. Second, this technique can be employed with any atom cell because it involves modification of the detection system. Third, this multichannel method can be used with any laser repetition rate. The principal disadvantage of this technique is that the background correction measurement was made 3-4 nm away from the analytical wavelength.

1-500 fg and a linear dynamic range between four and seven orders of magnitude. At present, its greatest disadvantage is the unreliability of the laser systems used as excitation sources. The development of more reliable laser systems, such as titanium sapphire systems, may allow the wider use of LEAFS. Several background correction techniques have been developed for LEAFS, and Zeeman background correction is probably the best choice because of its ability to correct for structured background, which has recently been demonstrated.

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Advances in atomic spectroscopy. / Volume 2 by J. Sneddon


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