Application of graphite tubes modified with high-melting carbides in electrothermal atomic absorption spectrometry. I. General approach

作者：Volynsky AB^*

来源：Spectrochimica Acta Part B: Atomic Spectroscopy , 1998, 53(4): 509-535.

DOI：10.1016/S0584-8547(98)00093-7

• electrothermal atomic absorption spectrometry
• carbide-modified graphite tubes
• high-melting carbides
• chemical modifiers

The principal processes taking place in graphite tubes modified with high-melting carbides are critically discussed. Analysis of the published data supports the idea that these processes depend largely on the tube treatment procedure applied and on the properties of the corresponding carbide, Therefore, the most commonly used methods of tube treatment and some properties of high-melting carbides are described. Depending on the composition and structure of the carbide layer, the reactivity of graphite may increase or decrease. For both situations, the reasons for changes in the sensitivity and lifetime of the graphite tube are discussed. The major processes taking place in carbide-modified graphite tubes seem to be of a catalytic nature.

• 出版日期1998-4-29