Ionization-based detection
First Claim
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1. A detector structure comprising:
- a photo-ionization detector (PID);
an electron capture detector (ECD); and
a vacuum ultra violet (VUV) source, wherein the VUV source is an ionization source for both the PID and ECD.
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Abstract
Embodiments of the present invention relate to detector structures for use in a micro gas analyzer, preferably in a differential setup. The detector structures may comprise one or more detector types, such as photo-ionization (PID), electron capture (ECD), ion mobility (IMS), differential mobility (DMS), ion-trap mass spectrometer (ITMS), in which all are provided with ions and electrons from one vacuum ultra violet (VUV) source. This source may also provide ions for ion-based gas pumps.
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Citations
20 Claims
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1. A detector structure comprising:
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a photo-ionization detector (PID);
an electron capture detector (ECD); and
a vacuum ultra violet (VUV) source, wherein the VUV source is an ionization source for both the PID and ECD. - View Dependent Claims (2, 3, 4, 5)
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6. A micro analyzer, comprising:
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a sample inlet, wherein a sample enters the micro analyzer;
a sample channel, wherein the sample is contained and flows through the micro analyzer;
a sample exit, wherein the sample exits the micro analyzer;
a photo-ionization detector (PID), coupled at or near the sample exit;
an electron capture detector (ECD), coupled at or near the sample exit; and
a vacuum ultra violet (VUV) source, wherein the VUV source is an ionization source for the detectors. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A micro analyzer, comprising:
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a sample inlet, wherein a sample enters the micro analyzer;
a sample channel, wherein the sample is contained and flows through the micro analyzer;
a sample exit, wherein the sample exits the micro analyzer;
a photo-ionization detector (PID), coupled at or near the sample inlet and exit;
an electron capture detector (ECD), coupled at or near the sample inlet and exit;
a micro discharge detector (MDD), coupled at or near the sample inlet and exit;
an ion mobility spectrometer (IMS), coupled at or near the sample inlet and exit;
a differential (ion) mobility spectrometer (DMS), coupled at or near the sample inlet and exit; and
a vacuum ultra violet (VUV) source, wherein the VUV source is an ionization source for the above detectors.
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18. A method for analyzing a sample, comprising:
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flowing a sample into a gas chromatography (GC) sample channel, sufficient to separate the sample components; and
contacting a sample with at least one PID and ECD, sufficient to measure the desired properties (elution time and concentration) of the sample components, wherein the PID and ECD utilize the same VUV source for ionization. - View Dependent Claims (19, 20)
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Specification