How does the optical emission spectrometer detect metal elements?

First, the sample is excited into atomic vapor by spark discharge, and the atoms or ions in the steam are excited to produce emission spectrum, and then the emission spectrum is dispersed into various spectral bands through the optical fiber into the spectrometer spectrometer, and the intensity of the emission spectrum of each element is proportional to the content of the element in the sample according to the emission wavelength range of each element.

Optical emission spectrometer metal element analysis is a more scientific means to detect the quality of materials in modern times. In our daily forging, there are more than 80 kinds of commonly used metal elements, and the combination of alloys is up to thousands, and the metal product manufacturing enterprises purchase alloy production is mostly formulated according to market demand, so the internal elements of different alloys are also different, and the corresponding spectrometer detection range also needs to be wider to meet the detection needs.

So how do you look at the detection range of a metal detection spectrometer when purchasing it? After consulting engineers with 20 years of experience, I learned that the main focus is on the core component sensor, because different elements have different spectra, and the main function of the sensor is to collect and process the spectrum, and the spectrum can be accurately detected.

Therefore, when the quality of the sensor is not good, the ability of the sensor to collect and process the spectrum is weak, and the elements that can be detected will be reduced accordingly, resulting in the inability to meet the quality inspection requirements of the alloy in the development process of the enterprise. For example, Mr. Wang in Shanghai has a metal tableware finished product production company, the reason why he came to re-purchase the metal spectrometer this time is because the previous purchase of the spectrometer is long, and the internal hardware is aging, which leads to the operator in the procurement, a batch of problematic raw materials are tested to be qualified, and the products produced by the back assembly line are problematic when the other party uses the spectrum analyzer to detect quality problems, so that Mr. Wang not only loses money, but also loses corporate reputation.

Spectrum analyzer to measure metal elements how to see hello dear! The easiest way to determine a metal element is by calcination.

Each metal element has a different color when calcined. For example, sodium is yellow. If you want to identify the content of metal elements:

1.Optical spectrum analyzers. The advantage is that multiple elements can be analyzed at one time with high accuracy.

The disadvantage is that it is too high, a set of hundreds of thousands to millions, so it is currently only used by a few large enterprises. 2.Spectrophotometer.

The advantage is that the detection wavelength is easy to choose, and ** is not high. The disadvantage is that the test results cannot be displayed directly (to be converted); There is no curve creation call function, and different elements are detected each time to recalibrate the first one; It is inconvenient to put in and pour out the liquid in the cuvette; It has high requirements for the basic knowledge of chemical analysis of operators, so it cannot meet the needs of enterprises to accept on-site testing and analysis. 3.

Colorimetric element analyzer. The advantage is that it is easy to use, not high, and does not have high requirements for the chemical analysis of operators, so it is widely used in on-site analysis of enterprise production inspection. However, due to its historical reasons, there are the following congenital defects, I hope it can help you.

If my answer is helpful to you, please give a thumbs up (in the lower left corner), I look forward to your like, your efforts are very important to me, and your support is also the motivation for my progress. Finally, I wish you good health and a good mood!

Non-ferrous metal is an alloy composed of a non-ferrous metal as the matrix and the addition of one or several other elements. Non-ferrous metals generally refer to all metals except iron, manganese, chromium, and iron-based alloys. Non-ferrous metals can be divided into heavy metals (such as copper, lead, zinc), light metals (such as aluminum, magnesium), *** (such as gold, silver, platinum) and rare metals (such as tungsten, molybdenum, germanium, lithium, lanthanum, uranium).

These non-ferrous metals are used in all aspects of life, in the early years, most of the non-ferrous metal processing is concentrated in small and medium-sized materials and parts, the requirements for large overall materials and large special materials are not high, large ships, aircraft carriers, aircraft, etc., put forward new requirements for China's large-scale non-ferrous metal processing equipment, and also promote the development of China's large-scale processing equipment.

Optical emission spectrometer determines and analyzes the composition of non-ferrous metal elements.

Optical emission spectrometer determines and analyzes the composition of non-ferrous metal elements.

Nowadays, China's aerospace, military and other aspects are in the stage of rapid development, with the process of development, the requirements for non-ferrous metals are gradually increasing, so for this kind of non-ferrous metals with special requirements, relevant enterprises should develop specialized and special innovative processing equipment to meet the demand.

The development of analysis and testing standardization has boosted the progress of the overall non-ferrous metal industry. The processing of non-ferrous metal materials is related to the development and security of industry and even national defense. New technologies, new materials and new processes are required to rely on high-end equipment to complete, in the face of the current situation of China's non-ferrous metal processing industry, the research and analysis of non-ferrous metals is a breakthrough point.

The spectrometer can measure various elements of various non-ferrous metals, and is suitable for a variety of metal matrices, such as: aluminum-based, copper-based, zinc-based. The full-spectrum technology covers the full range of elemental analysis, and the channel elements can be selected according to customer needs; The analysis is fast, and the elemental composition of all channels is measured in less than 20 seconds.

For different analytical materials, by setting the pre-ignition time and marking, the instrument can achieve the best analysis effect in a short time; The optical system adopts a constant temperature optical chamber, and the arc flame generated during excitation is directly introduced into the optical chamber by the lens to realize the direct optical path, eliminate the optical path loss, improve the detection limit, and the measurement results are accurate, and the reproducibility and long-term stability are good. Non-ferrous metal analysis is very effective and convenient to do by direct emission spectrometer analysis, which can provide a lot for the analysis of non-ferrous metals.

Each material has different requirements for elements, basically twenty or thirty kinds.

CCD's instrument can detect all elements at the same time, SPECTRO, GNR are brands with good stability, and the specific situation can be contacted by the manufacturer.

Whether it is imported or domestically produced, the spectrum analyzer has its own detection range value, which contains high and low detection values, and the high and low values that different spectrum analyzers can detect are also different. For example, metal requires that the aluminum content is not less than that, and only contains impurities. Magnesium-aluminum alloys, in which the alloy contains a small amount of magnesium (<1), must meet this detection range to be able to detect accurately.

So how to judge whether the optical spectrum analyzer is accurate or not? Because the material spectrum analyzer can accurately detect metal composition elements mainly by using different materials to have different refraction spectra after strong light irradiation, so the detection accuracy is related to the grating that is mainly responsible for the spectroscopy, and the quality of the grating directly affects the detection performance and, so how to know the grating? Grating is not good mainly to see how its light transmittance, and the quality of this kind of optical precision equipment is often related to its production and processing technology, in this kind of processing technology, Germany and Japan and other finishing countries of the grating is more high-quality, in the spectroscopic processing is more excellent, so that the spectrum wavelength is accurate, the results of receiving processing feedback will be accurate, and the content of the material can be detected when it is still accurate.

For example, the 5th generation optical spectrum analyzer can control the detection error of high and low content within and with.

Due to the influence of factors such as spectral intensity, processing and difficulty of optical debugging, the width of the slit is usually about 50 m, which affects the resolving ability of the multi-channel spectrometer. The full-spectrum direct reading spectrometer uses CCD as the detector, and its pixel width is only about 10 m, which greatly improves the resolving ability of the spectrum. What are the means to achieve vacuum UV band measurement?

In the practical application of optical emission spectrometer, the best spectral lines of elements such as C, P, S, AS and so on are in the vacuum ultraviolet band.

The more elements that are required to be analyzed, the better the economic benefits. The analysis accuracy is very high, which can effectively control the chemical composition of the product to ensure that it can meet the specifications of national standards, and even control the alloy composition to the middle and lower limits of the specifications, so as to save the consumption of intermediate alloys or ferroalloys. Analysis data can be printed out from a computer or stored on a floppy disk as a permanent record.

It is a scientific instrument that decomposes light with complex composition into spectral lines.

Metal will be according to different application areas to produce the corresponding materials, this kind of metal is generally alloy, there are a variety of elements of raw materials inside, once the internal proportion of raw materials is not accurate, it will lead to the characteristics of the finished product is different, such as stainless steel internal elements The proportion of internal elements is not accurate, it will lead to the decline of stainless steel material's anti-rust ability and solidity ability, and such products will affect the reputation of enterprises when they are put into the market. Therefore, modern forging enterprises generally use full-spectrum direct reading in front of the furnaceSpectrometer

The proportion of materials is controlled.

Before revealing the secret, let's understand the principle of the instructions for the use of the direct reading spectroscopy instrument: the metal will have refracted light after being irradiated by strong light, and the internal element results can be obtained after the light treatment of the instrument. Therefore, the stronger the ability to perceive and process light, the more elements can be detected, and the device that detects and perceives and processes light in the spectrum analyzer is the sensor, which affects the range that the spectrum analyzer can detect.

At present, the sensors on the market are generally divided into CMOS sensors and CCD sensors.

Technically speaking, the CMOS sensor is more high-quality, because the CMOS sensor is a surface detector, so the detection can cover the full spectrum, and the analysis line can be selected according to the demand, especially the principle that an element has multiple characteristic curves can be used to select multiple analysis curves for an element to do analysis, which is more flexible than the traditional channel type (PMT photomultiplier tube) and CCD sensor. When enterprise users need it, they only need to increase the demand for elemental analysis, and can detect other grades of metals and materials without changing the instrument hardware, which is very convenient.