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What is the principle of the high-frequency infrared carbon and sulfur analyzer you purchased?
Release time: 2019-04-02 09:07:26 Click: 3689
ICP 法、直读光谱法、 X 光荧光法、质谱法、色谱法、活化分析法等，各有其优点和适用范围 ，大多数厂家选择使用的是高频红外碳硫分析仪，这是一个什么仪器，您了解吗？ Determination of carbon and sulfur content in metals, including ICP method, direct reading spectroscopy, X- ray fluorescence method, mass spectrometry, chromatography, activation analysis, etc., each has its advantages and scope of application , most manufacturers choose to use high Frequency infrared carbon and sulfur analyzer, what kind of instrument is this, do you know?
The high-frequency infrared carbon and sulfur analyzer adopts infrared absorption method to heat the carbon and sulfur in the sample through high temperature under oxygen-enriched conditions to oxidize into carbon dioxide and sulfur dioxide gas. After being processed, the gas enters the corresponding absorption cell, absorbs the corresponding infrared radiation, and is forwarded by the detector as a signal, which is processed and output by the computer. This method has the characteristics of accuracy, rapidity, high sensitivity, and can be used in both high and low carbon and sulfur content. The infrared carbon and sulfur analyzer using this method has a higher degree of automation and a higher price, which is suitable for occasions with high analysis accuracy requirements.
SO2 等极性分子具有永久电偶极矩，因而具有振动和转动等结构。 Polar molecules such as CO2 and SO2 of the high-frequency infrared carbon-sulfur analyzer have permanent electric dipole moments, and thus have structures such as vibration and rotation. CO2 或 SO2 气体后，能产生强烈的光吸收。 According to quantum mechanics, it is divided into split energy levels, which can be coupled with incident characteristic wavelength infrared light to produce absorption. Gas molecules have a selective absorption spectrum in the infrared light band. When infrared light of a specific wavelength passes through CO2 or SO2 gas, it can be generated. Strong light absorption.
Because the detector converts the optical signal into an electrical signal, when the detector works in the linear region, selects a specific wavelength and determines the length of the analysis cell (absorption cell), the mixed light is converted from the measured light intensity. Measuring the concentration of gas, this is the basic principle of infrared absorption method to quantitatively measure the concentration of gas.
The analysis room includes a miniature infrared light source, mirror, modulation motor, absorption cell, filter and detector. 800 产生红外光，经吸收池被 CO2 、 SO2 吸收后再经过窄带滤光片，滤去除上述波长外的其他光辐射的能量，入射到探测器上，则探测器上检测到的是与 CO2 、 SO2 浓度相对应的光强，经过探测器光电转化为电信号，再经微机进行归一化定标处理，积分反演成为碳硫元素的百分含量。 The miniature infrared light source is electrically heated to 800 to generate infrared light. After being absorbed by the CO2 and SO2 in the absorption cell , it passes through a narrow-band filter to filter out the energy of other light radiation beyond the above wavelengths and enters the detector. The detected light intensity corresponding to the concentration of CO2 and SO2 is converted into an electrical signal by the photoelectricity of the detector, and then normalized and calibrated by the microcomputer, and the integral inversion becomes the percentage of carbon and sulfur. 64Hz 的交变辐射信号。 A modulation motor is placed between the light source and the absorption cell to modulate the optical signal into a 64 Hz alternating radiation signal. 64Hz 。 The center frequency of the detector output is 64Hz .
CO2 、 SO2 含量成比例的数值。 The electrical signal converted from the pyroelectric device is pre-amplified and post-amplified, and then converted into a microcomputer through digital-to-analog conversion. In the microcomputer, it is converted into a value proportional to the content of CO2 and SO2 through linearization .
The principle of the high-frequency infrared carbon-sulfur analyzer is as described above. It can detect not only metals, but also the accuracy can reach 7 points after the decimal point. It is a special detection instrument.