Answer :
Final answer:
Air sampling type detectors in Gas Chromatography provide continuous monitoring and must respond quickly to minute concentrations of solutes. They require features like high sensitivity, a linear response, and stability, and might need periodic calibration. Geiger counters and dosimeters are examples of such detectors used for measuring radiation.
Explanation:
Air sampling type detectors, such as those used in Gas Chromatography (GC), are designed to provide continuous monitoring of air quality. These detectors must be able to respond rapidly to minute concentrations of solutes as they exit a chromatographic column. For effective monitoring, the key desirable properties of a detector include a fast response time, high sensitivity, a linear response over a wide concentration range, and stability in operation. In addition, these detectors might need periodic calibration to maintain accuracy and may offer features such as a manual reset option. Some advanced detectors can even provide a level of selectivity for specific classes of solutes.
High-volume air samplers used for monitoring total airborne particulates might require different sampling times based on the environment they are operating in – shorter times for urban settings and longer for rural ones. Continuous automated instruments used in this context integrate sample injection with a flowing stream of reagents, enabling on-the-fly analysis and detection.
Examples of air sampling detectors include Geiger counters, scintillators, and dosimeters, each of which may be employed to measure specific types of analytes, such as radiation. The desired outcome from these instruments is a consistent, reliable monitoring that ensures safety and compliance with environmental standards.
