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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: 3327
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？ There are ICP , direct-reading spectrometry, X- ray fluorescence, mass spectrometry, chromatography, and activation analysis methods for measuring the carbon and sulfur content in metals . Each has its advantages and applicable scope . Most manufacturers choose to use high Frequency infrared carbon and sulfur analyzer, what is this instrument, do you know?
The high frequency infrared carbon and sulfur analyzer uses infrared absorption method to heat the carbon and sulfur in the sample under high temperature under oxygen-rich conditions to oxidize them into carbon dioxide and sulfur dioxide gas. After processing, the gas enters the corresponding absorption cell, absorbs the corresponding infrared radiation, is forwarded by the detector to a signal, and outputs the result after being processed by a computer. This method has the characteristics of accuracy, speed, and high sensitivity, and can be used for 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, and 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。 High-frequency infrared carbon and sulfur analyzers such as CO2 , SO2 and other polar molecules have permanent electric dipole moments, so they have structures such as vibration and rotation. CO2 或 SO2 气体后，能产生强烈的光吸收。 Divided into split energy levels according to quantum mechanics, it can be coupled with the incident characteristic wavelength infrared light to generate absorption. Gas molecules in the infrared light band have a selective absorption spectrum. When infrared light of a specific wavelength passes through CO2 or SO2 gas, it can produce Strong light absorption.
Because the detector converts optical signals into electrical signals, when the detector works in a linear region, a specific wavelength is selected and the length of the analysis cell (absorption cell) is determined, the measured light intensity is converted into the mixed gas. Measure the gas concentration, this is the basic principle of infrared absorption method for quantitative measurement of gas concentration.
The analysis room includes a miniature infrared light source, a reflector, a modulation motor, an absorption cell, a filter and a 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 absorption cell by CO2 and SO2, it passes through a narrow-band filter to filter out the energy of other light radiation outside the above wavelength. When it is incident on the detector, the The detected light intensity corresponds to the concentration of CO2 and SO2 , which is photoelectrically converted into an electrical signal by the detector, and then normalized and calibrated by a microcomputer. The integral inversion becomes the percentage content 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 64Hz 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 entered into a microcomputer through digital-to-analog conversion. In the microcomputer, a linear operation is performed to convert it into a value proportional to the content of CO2 and SO2 .
The principle of the high-frequency infrared carbon and sulfur analyzer is as described above. It can detect not only metals, but also accuracy up to 7 points after the decimal point. It is a special instrument for detection.