发明名称 |
Chlorine specific gas chromatographic detector |
摘要 |
A method and apparatus are set forth which enables a gas chromatographic column output to be connected with a pulse discharge chamber in which chemically bound chlorine in volatile organic or inorganic samples is measured. A spark discharge is formed in the chamber to ionize and excite helium molecules to a metastable state. In turn, that transfers excitation to a trace of krypton gas in the chamber which is ionized, and the ionized krypton then preferentially binds with chemically bound chlorine. The latter binding occurs with the liberation of a photon centered at about 222 nanometers thereby defining a spectral region of interest which is measured by a photomultiplier tube to quantify chemically bound chlorine.
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申请公布号 |
US6133740(A) |
申请公布日期 |
2000.10.17 |
申请号 |
US19960593827 |
申请日期 |
1996.01.30 |
申请人 |
VALCO INSTRUMENT CO., INC |
发明人 |
WENTWORTH, WAYNE E.;STEARNS, STANLEY D. |
分类号 |
G01N21/67;G01N27/68;G01N30/02;G01N30/64;G01N30/88;(IPC1-7):G01N27/62 |
主分类号 |
G01N21/67 |
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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