A Helium Ionization Detector (HID) is a type of ionization detector used primarily in gas chromatography (GC) and other analytical techniques for the detection of trace gases. This detector operates using the principle of ionization of gases and is known for its high sensitivity and ability to detect a wide range of compounds. ### How It Works: 1. **Ionization Process**: The detector utilizes a stream of helium gas in an ionization chamber.
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