Atomic-Absorption Spectrophotometry by W. T. Elwell, J. A. F. Gidley, R. Belcher and L. Gordon

By W. T. Elwell, J. A. F. Gidley, R. Belcher and L. Gordon (Auth.)

Show description

Read Online or Download Atomic-Absorption Spectrophotometry PDF

Best nonfiction_11 books

Bad Astronomy: Misconceptions and Misuses Revealed, from Astrology to the Moon Landing "Hoax"

«Bad Astronomy is simply simple sturdy! Philip Plait clears up each false impression on astronomy and house you by no means knew you suffered from. » --Stephen Maran, writer of Astronomy for Dummies and editor of The Astronomy and Astrophysics Encyclopedia«Thank the cosmos for the package of superstar stuff named Philip Plait, who's the area s major shopper recommend for caliber technological know-how in area and in the world.

Spirit and Ritual Morse Collect

Spirit and formality: The Morse number of old chinese language artwork, by means of Thorp, Robert L. and Virginia Bower

New Concepts of a Blood—Brain Barrier

The clinical contribution of Mike Bradbury to the research of the blood-brain barrier is enormous and wide-ranging, beginning together with his M. D. thesis in 1962 and nonetheless carrying on with this day. the numerous spectrum of themes in terms of the blood-brain barrier awarded during this quantity and the various geographical destinations from which either audio system and individuals accrued to wait the symposium are a becoming testomony either to Mike's generic impression within the box and to the esteem during which he's held.

Carotenoids: Volume 2: Synthesis

George Britton, Synnl/Jve Liaaen-Jensen and Hanspeter Pfander This booklet, quantity 2 within the sequence Carotenoids, is the 1st e-book to be released that's dedicated fullyyt to the entire synthesis of carotenoids, however it is well timed in view of the fast improvement and the becoming diversification of the carotenoid box.

Extra info for Atomic-Absorption Spectrophotometry

Sample text

In this way the most sensitive absorption line in a complex spectrum is readily identified. When a continuous source of radiation is used for absorption measurements, it is claimed that the loss in sensitivity caused by unabsorbed radiation passing through the wavelength selector to the detector can be partially offset by using a sufficiently stable source that allows measurements to be made with a high degree of precision. Instrumental requirements for such measurements include a source of continuous radiation with the highest possible stability of radiation output, a highly stable source of atomic vapour, a scanning wavelength selector with a very narrow band-width, and a recorder for measuring detector output.

If there is an excess of oxygen in the flame, the dissociation of oxides will be retarded in accordance with the law of mass action, whereas if the oxygen supply is below that necessary to achieve complete combustion of the fuel gas, the dissociation of oxides will be enhanced. It follows, therefore, that an ideal combination of temperature and environment is important in the process of oxide dissociation. This accounts for the observation that absorption due to aluminium was not detected in an oxy/cyanogen flame/ even though the use of such a flame gives rise to much higher temperatures than can be obtained with an oxy/ acetylene flame.

As indicated previously, flame temperature does not influence absorption characteristics significantly, provided that a sufficiently high temperature is available in a suitable environment to produce atomic vapour of the element being determined. In flames produced from conventional fuels, such as coal-gas, propane or acetylene, where the amount of air or oxygen is just sufficient to provide complete combustion of the fuel, some elements do not produce a significant amount of atomic vapour, and elements such as aluminium, titanium and silicon cannot be determined under these conditions.

Download PDF sample

Rated 4.39 of 5 – based on 22 votes