摘要:

Atomic absorption spectroscopy (AAS) is fundamentally a very simple technique. Light at the resonance wavelength of an element can be absorbed by atoms of that element in the vapor phase. This reduction in light from the source is the AAS signal. It is monotonically correlated with the number of atoms through which the light must pass. If anything else in the sample (the matrix) can reduce the intensity of radiation from the source, by scattering or molecular absorption, it will be indistinguishable from the analyte. This nonanalyte signal is called background absorption in this article whether the cause of the signal is scattering or absorption.

ISSN:0007-8980    

DOI:10.1080/10408348808542809

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

In recent years, there has been increasing interest in the development of optically based chemical sensors. While a large variety of devices are possible, they share as a common feature an immobilized reagent phase which changes the optical properties in some way upon interaction with an analyte on either a continuous or a reusable basis. Factors stimulating this interest include the following:

ISSN:0007-8980    

DOI:10.1080/10408348808542810

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor