Portable total hydrocarbon analyzer

NegotiableUpdate on 01/22

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Nature of the Manufacturer: Producers

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Overview

The advantages of the portable total hydrocarbon analyzer product are that the host is powered by AC and DC, which is used for continuous monitoring of heating type FID on site. It can eliminate cold spots and avoid local sample condensation of solid metal hydride technology, ensuring the safety of personnel during transportation and work site. The required gas sources (standard gas, zero gas, hydrogen gas) of the instrument are integrated into the USB port of the host. The data analysis can be equipped with an optional expansion base, which can measure methane/non methane hydrocarbons

Product Details

Principle Overview

In HJ 38-2017 and HJ1012-2018, total hydrocarbons are defined as the sum of gaseous organic compounds that respond on a hydrogen flame ionization detector (FID). portableTotal hydrocarbon analyzerBased on the principle of gas chromatography, using a hydrogen flame ionization detector (FID), automatic measurement of total hydrocarbons (total hydrocarbons) in the sample gas can be achieved.

Working principle of portable total hydrocarbon analyzer:

portableTotal hydrocarbon analyzerUsing FID detector, hydrogen is burned in air as energy source, and the carrier gas (N₂）Carrying analyzed components and combustible gases (H)₂）Entering the side detector from the nozzle, the auxiliary gas (air) is introduced from all around. The measured component is dissociated into positive and negative ions in the flame. In the electric field formed by the polarization voltage, the positive and negative ions move towards the opposite electrodes, and the resulting ion flow is collected and output by the collecting electrode. After impedance conversion and amplification, measurable electrical signals are obtained. The ionization mechanism of FID is different for hydrocarbons and non hydrocarbons. ）Therefore, organic compounds can be quantitatively analyzed based on the magnitude of the signal.

1. For hydrocarbons, every carbon atom in the hydrocarbons burned in the flame is converted into a basic and common response unit - methane, which then reacts with oxygen in the air to form CHO through the following reaction process⁺Positive ions and electrons.

CH＋O →CHO⁺＋e

So, FID is carbon responsive to hydrocarbons, which is the main reaction and becomes the primary medium for charge transfer. Under the action of an electric field, positive ions and electrons e move towards the collector and emitter, respectively, forming an ion flow.

2. For non hydrocarbon compounds, the response mechanism is relatively complex and varies with the different functional groups contained. The basic rule is that carbon atoms that are not connected to heteroatoms are converted to methane.