Theory and practice of a variable dome splitter for gas chromatography-olfactometry.
Theory and practice of a variable dome splitter for gas chromatography-olfactometry.
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气相色谱-嗅觉测量用可变圆顶分流器的理论与实践
DOI：
10.1016/j.chroma.2013.02.057
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
P. Schulze Lammers
中科院分区：
文献类型：
--
作者：
P. Boeker;T. Haas;P. Schulze Lammers
对于与气相色谱相结合的嗅觉测量，需要一个装置在检测器和嗅探端口之间分流 GC 流出物。固定分流比是通过简单的分流器获得的，并对两个出口进行适当的限制。通过额外的控制流量可以实现可变分流比。其中一种设备是圆顶分流器，具有一个输入流（GC 流出物）、两个输出流（至两个出口）和两个控制输入。初步实验揭示了这种设备与预期分流比的偏差。仅在一个工作点设置限流器的尺寸不足以在 GC 运行的整个温度范围内获得预期的分流比。因此，考虑到限流器的温度依赖性和圆顶内的内部压力，开发了流动系统的物理模型。这包括可压缩、等温和层流流态条件下的流动（分别是质量）平衡的求解。测量结果与理论计算结果非常吻合。因此，该模型可用于优化限制尺寸并计算 GC 运行期间给定温度下的有效分流比。
For olfactometric measurements in combination with gas chromatography a device is needed to split the GC effluent between the detector and the sniffing port. Fixed split ratios are obtained by simple flow splitters with appropriate restrictions towards the two outlets. Variable split ratios are possible with additional control flows. One such device is a dome splitter with one input flow (the GC effluent), two output flows (to the two outlets) and two control inputs. Preliminary experiments revealed deviations from the expected split ratios of such a device. The dimensioning of the flow restrictors at only one working point was not sufficient to obtain the expected split ratios over the whole temperature range of a GC run. Therefore a physical model of the flow system has been developed, taking into account the temperature dependence of the restrictors and the internal pressure in the dome. This included the solution of the flow (respectively the mass) balance under the condition of a compressible, isothermal and laminar flow regime. The measurements are in good agreement with theoretical calculations. The model can therefore be used to optimise the dimensions of the restrictions and to calculate the effective split ratio at a given temperature during the GC run.
影响因子：
4.1
作者：
H. Janssen;Phillip Marriott;R. Vreuls
通讯作者：
R. Vreuls
用于同步嗅探 MS 监测的可变流出物分流器
DOI：
--
发表时间：
1986
期刊：
影响因子：
--
作者：
S. Nitz;F. Drawert;U. Gellert
通讯作者：
U. Gellert