| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a plasma torch for elemental analysis, an analytical apparatus and a method using the plasma torch, and a protector for the plasma torch capable of suppressing dissolution of a component from structural members of a plasma torch having a threefold tube structure, reducing a background peak concerning an analyzing object element, and conducting elemental analysis with high precision. <P>SOLUTION: The plasma torch for elemental analysis 10 has a concentrically arranged threefold tube structure comprising a sample introducing tube 11 through which an analyzing object sample flows toward an opening 13, an internal tube 21 through which gas consisting of plasma flows toward an opening 23, and an external tube 31 through which coolant gas flows toward an opening 33. Plasma can be formed at each opening. The plasma torch 10 is provided with protectors 27, 37 which protect in such a way that they cover parts of the internal tube and the external tube with which plasma comes into contact or to which plasma comes close and the vicinity of the parts, thereby suppressing the dissolution of the components from the internal tube and the external tube. <P>COPYRIGHT: (C)2003,JPO |
