发明名称 |
Multisample dynamic headspace sampler |
摘要 |
Method and apparatus for collecting a large number of outgas samples at the same time. Specimens to be tested for outgassing are placed in throw-away widemouth bottles, and the bottles are placed in cups provide in a heating block. A custom made cap is fastened to each bottle using an O-ring. Each cap is provided with an outgassing sample collecting tube. A source of pure gas such as nitrogen or helium is connected by way of a pressure regulator and a hydrocarbon filter to a manifold. Each of the caps on each bottle is coupled to the manifold by way of a metering valve. An adsorbent is placed in each collecting tube. The gas pressure is set to between 10 and 15 psi. The flow through each collecting tube is set to a predetermined level by adjusting its metering valve and measuring the flow at the exit of the collecting tube using a flowmeter. The heating block is heated by means of a thermal tape used in conjunction with a power supply and a thermocouple inserted into a hole in the heating block. The samples are heated and held at an elevated temperature for a predetermined length of time. After the outgassing test is completed, the collecting tubes are desorbed and analyzed with the appropriate instrumentation.
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申请公布号 |
US5859356(A) |
申请公布日期 |
1999.01.12 |
申请号 |
US19970892013 |
申请日期 |
1997.07.14 |
申请人 |
SEAGATE TECHNOLOGY, INC. |
发明人 |
SCHEPPERS, KARL H.;RUDD, GREGORY I. |
分类号 |
G01N1/00;G01N1/22;G01N1/26;G01N1/34;G01N7/14;G01N35/00;(IPC1-7):G01N7/14 |
主分类号 |
G01N1/00 |
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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