Direct current plasma-optical emission

Liquid Scintillation Systems, LSS Neutron Counting Systems, NCS Direct-Current Plasma Optical Emission Spectrometry, DCP-OES IR Spectroscopy (e.g. FTIR)... 

Table II. Comparison of the Composition of Spanish Colonial Majolica Analyzed by Instrumental Neutron Activation Analysis (INAA) and Direct Current Plasma-Optical Emission Spectrography (DCP-OES) CD > 0 0 1...

Direct Current Plasma Optical Emission Spectrometry (DCP-OES)... 

Brennan, M.C. and Svehla, G. (1989) Flow injection determination of boron, copper, molybdenum, tungsten and zinc in organic matrices with direct current plasma optical emission spectrometry, Fresenius Zeitschrift fur Analytische Chemie, 335, pp893-899. 

DCP-AES direct current plasma atomic emission spectrometry DCP-OES direct current plasma optical emission spectrometry see DCP-AES DELEIA dissociation-enhanced lanthanide fluoroimmunoassay demyeUnation removal of the myelin sheath of a nerve... 

Emission spectroscopic techniques such as inductively coupled plasma optical emission (ICP-OES) and direct current plasma optical emission (DCP-OES). include the analysis of copper in biological materials (Delves et al.. 1983. Roberts et al., 1985). These techniques, with suitable sample preparation, have sufficient low bias and precision for clinical work but are more expensive and more complex than AAS (Herber et al.. 1982). Flow injection-ICP-OES will be mentioned below. 

As shown in Table 28-1, several methods are used to atomize samples for atomic spectroscopic studies. Inductively coupled plasmas, flames, and electrothermal atomizers are the most widely used atomization methods we consider these three methods as well as direct current plasmas in this chapter. Flames and electrothermal atomizers are widely used in atomic absorption spectrometry, while the inductively coupled plasma is employed in optical emission and in atomic mass spectrometry. 

During the 1980s, a rapidly increasing number of methods have been published for mercury determination by AES (often called OES = optical emission spectrometry) after excitation/ionization in a gas plasma, usually argon. The plasma source most frequently used is an ICP, but also other kinds of plasma sources are used, e.g. alternating current plasma (ACP), direct current plasma (DCP), and microwave-induced plasma (MIP). AES has a wide multi-element capability the linear range extends over 4-6 orders of magnitude. 

ICPs are by far the most common type of plasma sources used in today s commercial ICP optical emission (ICP-OES) and ICP mass spectrometric (ICP-MS) instrumentation. However, it was not always that way. In the early days, when researchers were attempting to find the ideal plasma source to use for spectrometric studies, it was not clear which approach would prove to be the most successful. In addition to ICPs, some of the other novel plasma sources developed were direct current plasmas (DCPs) and microwave-induced plasmas (MIPs). Before I go on to describe the ICP, let us first take a closer look at these other two excitation sources. 

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