发明名称 |
Atomic absorption spectrophotometer and graphite tube type cuvette used for the same |
摘要 |
The invention intends to provide an atomic absorption spectrophotometer which can establish a uniform heat distribution during heating of a sample and can improve analysis accuracy and analyzing efficiency. For this purpose, a graphite tube type cuvette mounted in a graphite atomizer furnace for an atomic absorption spectrophotometer comprises a large-diameter portion for retaining a sample in place, a small-diameter portion connected to the large-diameter portion and having a smaller diameter than the large-diameter portion, and a step portion for demarcating between the large-diameter portion and the small-diameter portion. The graphite tube type cuvette is formed such that its cross-sectional area in a plane perpendicular to the direction of passage of an electric current supplied to the cuvette is the same in any of the large-diameter portion, the small-diameter portion and the step portion. The amount of resistance heat is thereby also the same in any portions.
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申请公布号 |
US5822059(A) |
申请公布日期 |
1998.10.13 |
申请号 |
US19960633234 |
申请日期 |
1996.04.16 |
申请人 |
HITACHI LTD. |
发明人 |
TOBE, HAYATO;MORIYA, KAZUO;EBATA, YOSHISADA;TERUI, YASUSHI |
分类号 |
G01N21/31;G01N21/74;(IPC1-7):G01J3/30 |
主分类号 |
G01N21/31 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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