What is a flame ionization detector?
Flame ionization detector (FID) is a tool used to detect the presence of hydrocarbons, namely butane, hexane and other carbon compounds that could be present in the measured sample. The device is connected to a gas chromatograph by a tube called the capillary and has a flame chamber. The gases are injected into this chamber from one source, while hydrogen and oxygen are added from another. The electrical ignition component is used to ignite the flame inside; Subsequent burning of hydrogen and oxygen creates a charged current between the flame that acts as an electrode, and another electrode in the chamber. This is a tool with which the response is measured. The cylindrical electrode that surrounds the flame collects ions created from the combustion process, when the anapot is applied between the two. The current is generated and then amplified, while the output is collected by electronic data collectors. Each type of gas has a specific basic current and flow, and when it is mapped, operators can determine the present gas consultedA guide that shows flows that different gases usually have.
When the fuel is added to the flame ionization detector, it is activated at a predetermined flow. After the air is pumped, the flame is lit and left for an hour to stabilize and burn for the most accurate results. The fuel flow turns off the flame and then the tide is switched off for other gases. The portable detector works in a similar way and is commonly used to monitor volatile organic compounds (VOC). With them, the sensitivity can be adversely affected if the temperature changes rapidly or there are NTENSE IElectric fields present in the environment.
Flame ionization detector is only able to detect organic compounds. The device is commonly used for pharmaceutical production and analysis of pesticides. It is possible to measure methane or even toxic compounds such as hydrogen waters because they contain carbon molecules. ANDNorganic gases are difficult to detect with FID. For example, ammonia has no carbon in its molecular structure, so it can be unnoticed.