How about an OES optical emission spectrometer?

Handheld spectrometers require high resolution and signal-to-noise ratio, better intensity accuracy and wavelength accuracy, as well as strong anti-external interference and excellent instrument stability. If you want to know more about it, you can consult Beijing Lijia United Technology****, thank you!

As an elemental analysis instrument for steel and non-ferrous metal products, OES photoelectric direct emission spectrometer has become an essential tool for the production of high-quality metal products due to its fast, accurate, stable and reliable nature. Meet the requirements of R&D, process control, incoming inspection, and product sorting in the steel and non-ferrous metal industries.

AES inductively coupled plasma emission spectrometer for the determination of various substances (soluble in hydrochloric acid, nitric acid, etc.).

hydrofluoric acid, etc.).

Shanghai Yu Garden Lantern Festival is the most well-known and influential event in Shanghai during the Spring Festival, and it is an important cultural event representing Shanghai's humanistic tradition. The lantern festival covers an area of hectares, from the first day of the first lunar month to the eighteenth day of the first lunar month every year, and is held in the famous ancient garden Yuyuan Tourism City with the southern garden architectural style of the Ming and Qing dynasties.

It is one of the most influential and well-known traditional cultural activities in Shanghai. The lantern festival in Yuyuan Garden has a long history, and there is a record of the lantern festival in the late Qing Dynasty thinker Wang Tao's "Yingqiao Miscellaneous Notes" (published in 1875): "The inner garden of the Chenghuang Temple and the places where Cuixiu and Dianchun are ,..

Since the beginning of the first month, the door has been openedOn the eve of Shangyuan, Luo Qi was in a group, the orchestra was like boiling, and the fire trees and silver flowers were extremely bright. This is evident from the pomp and circumstance of the lantern festival at that time.

But then the lights fade. It was not until 1979 that the Lantern Festival was re-held in Yu Garden, and a total of 8 sessions were held in 1992, among which the larger ones were the Dragon Year Garden Party in 1988 that integrated lantern viewing, music tasting, painting and other entertainment, the Lantern Festival jointly organized by Jiangsu Zhenjiang Overseas Chinese Lantern Company in 1989, the Lantern Festival held in 1990 to welcome the Asian Games and the National Day, and the Lantern Festival held in 1992 to welcome the "92 Sino-Japanese Friendship Tourism Year" and the "Jiangsu, Zhejiang and Shanghai Tourism Year".

Since 1995, Yuyuan Tourism Co., Ltd. has set up a lantern festival preparatory team, equipped with full-time personnel, specifically for the "Yuyuan New Year Lantern Festival" service, and the lantern festival has also entered a new stage of systematic development. The whole lantern festival takes advantage of the shape of the Jiuqu Bridge and the unique water surface conditions, with the lake pavilion and the Oriental Pearl echoing as the background, and combines the traditional lantern exhibition with modern technology, showing the traditional Chinese culture and lantern culture, as well as the unique Shanghainese culture of Shanghai. The whole lantern festival is integrated with the traditional Chinese New Year celebrations, which is unique.

Bring auspicious blessings for the New Year to the majority of visitors. During the Lantern Festival, it will attract more than 100,000 domestic and foreign tourists every day, expanding the popularity of Yu Garden and bringing new vitality and development to the old city.

The analytical accuracy of photoelectric direct reading analysis instruments is basically divided into two categories: PMT photomultiplier tube and CCD detector.

pmt: accuracy.

CCD: The accuracy of most elements.

I am still very optimistic, from the development history of the spectrometer, it can be seen that the original PMT spectrometer is the world, and later the emergence of CCD spectrometer, due to its full spectrum analysis, easy to expand characteristics quickly cannibalized a lot of PMT market. However, PMT spectrometer still has a high market share in some large steel mills or enterprises with high requirements for detection accuracy, and the main reason is that the CCD detection accuracy is not enough. However, the high sensitivity of COMS makes it possible to achieve high accuracy like PMT.

With the advantages of both CCD and PMT, there is no reason not to be optimistic.

There is too much content to display, you can refer to the following two materials.

The spectrometer is a simple operation and rapid detection of metal components. Using the analytical principle of atomic emission spectroscopy, the optimal spectral range of each element can be measured by photomultiplier tubes, but the market has been upgraded from photomultiplier tubes to CMOS sensors. There are many manufacturers of direct emission spectrometer, and to choose a reliable manufacturer, you can choose from the following aspects.

1. Technical parameters.

Direct reading spectrometers are mainly used in casting, steel, metal and smelting, as well as military industry, aerospace, electric power, chemical industry, colleges and universities and other units. The parameters of the spectrometer are determined by the dispersion component, and the selection of the dispersive component is a key issue in the design of the imaging spectrometer, and the advantages and disadvantages of the prism and grating dispersion components should be comprehensively weighed. A reliable manufacturer will customize the parameters according to the needs, which has made it more cost-effective.

2. Functional use.

Optical emission spectrometer is a rapid quantitative analysis instrument for the analysis of ferrous and non-ferrous metal composition. It can be used for a variety of matrix analysis, AL, PB, MG, ZN, SN, FE, CO, NI, TI, CU, etc., a total of more than 50 elements. When choosing a direct emission spectrometer, you should first clarify what the purpose of purchase is, and then purchase it according to your own needs, you can consult the manufacturer about the advantages and disadvantages of different optical spectrum analyzers and the scope of use, so as to obtain more detailed information.

3. Manufacturer qualification.

In addition to the technical certificate, the manufacturer of the direct reading spectrometer should also have the provincial approval of the "People's Republic of China Measuring Instrument Type Approval Certificate", which means that it is a regular production enterprise, with reasonable property rights, and it is worth reassuring in the process of use.

4. After-sales service of the manufacturer.

The service ability after the purchase is also quite important, regardless of the distance can be arranged to install and debug personnel within the specified time to provide door-to-door service, problems have a team of engineers to solve in a timely manner, rather than two or three days no one cares.

Optical reading of spectra.

Laiyi: suitable for outdoor names.

Self-planted applications can be used for internal analysis of pressure vessels, in-situ analysis of pipelines or on-the-mill analysis. It is widely used in casting, steel, metal and smelting, as well as military industry, aerospace, electric power, chemical industry, colleges and universities, commodity inspection, quality inspection and other units.

Ordinary spectrometer: through the grasp of optical information by the spectrometer, or the display and analysis of computerized automatic display numerical instruments, so as to detect what elements are contained in the article. Spectrometer is a basic equipment that applies the principle of optics to observe, analyze and process the structure and composition of substances, and has the advantages of high analytical accuracy, large measurement range, fast speed and small sample consumption.

Therefore, it is widely used in metallurgy, geology, petrochemical, medicine and health, environmental protection and other departments, and is also an indispensable instrument for military reconnaissance, space exploration, resources and hydrological survey. [1]

Ordinary spectrometer model.

The circumference is very large, there is a fluorescence attack spectrometer, and there are many kinds of fluorescence inside, molecular spectrometer. zhi

The principle of an optical emission spectrometer.

The principle of DAO optical reading spectrometer is that the sample passes through the arc or spark, and the intensity of the emission spectral line of each element is directly proportional to the content of the element in the sample, and the content of each element is analyzed by detecting the energy of the emission spectral intensity.

The difference between an optical emission spectrometer and an ordinary spectrometer.

1. The direct reading spectrometer can detect the content of many elements at one time, qualitatively and quantitatively. It is also possible to have a spectrometer, but the accuracy is not high.

2. The sample of the direct reading spectrometer does not need to be processed a lot, and the solid grinding sample is detected. Many spectrometers are cumbersome to detect.

In fact, it may be said that the difference between a full-spectrum direct reading spectrometer and an ordinary spectrometer should be said.

The full-spectrum direct reading spectrometer is a spectroscopic instrument that uses CCD and CMOS as detectors. The other is a spectroscopic instrument with PMT as a detector.

PMT (Photomultiplier Tube), CCD (Inductively Coupled Device).

If the material is simple and there are fewer elements to be detected, the detection ability of PMT is stronger than that of CCD, and when the element content is less than 1 part per million (i.e., PMT has better detection ability than CCD, but it cannot be said that PMT is more stable than CCD, which is completely two different concepts. In fact, PMT works under high pressure for a long time and is very sensitive to vibration, while CCD has relatively lower requirements for the environment. In terms of practical use in a suitable experimental environment, there is no obvious difference between the two.

When the material is complex and there are many substrates and elements to be inspected, it will be a challenge for PMT. Because the spectrometer adopts the Par-shaped Runge structure, only 60 channels can be arranged (although some manufacturers claim to be able to arrange more channels, but the practical application is very few, and will make sacrifices in anti-interference), and from the practical application, when the number of channels exceeds 55, it is difficult to arrange, and there will be serious mutual interference between the tubes, so that the detection ability of PMT is not as good as CCD.

It is also unrealistic to install PMT in the field, although it is theoretically possible. However, the spectrometer of the PMT detector is quite difficult to upgrade at the user's site, and it is actually not operable. CCD fundamentally eliminates the problem of channel count, and can reduce channel-to-channel interference by optimizing channels.

In addition, the CCD itself can cover the conventional detection range requirements in the full spectrum, so the software can realize the expansion of the analysis range at the user's site, including the increase of the analysis elements and the analysis matrix, and the increase of the analysis element content range.

For product-based users, the lower limit of the analysis element is almost above 10 ppm, and the advantage of the lower limit of PMT analysis is actually not of much help to them, but now the material industry is changing more and more, faster and faster, and the user's requirements for scalable analysis are more practical, so from the demand side, CCD will become the mainstream. Of course, the actual market also bears this out.

Purchasing a direct reading spectrometer is like buying clothes, everyone thinks that the quality of the spectrometer with the direct reading spectrometer brand will be better, but there are a variety of direct reading spectrometer brands on the market, and everyone is a little at a loss in the face of these brands.

When you choose, you will first start with the brand from the quality aspect, so how to look at the quality? You can see the sensor inside the optical emission spectrum analyzer and the quality of the grating, which control the detection range and detection accuracy of the spectrometer, respectively. In this way, the purchased spectrometer is more suitable for the needs of the enterprise in actual use.

Then it is to look at the strength of the manufacturer, to see if it has its own factory and staff, the more people indicate that it has more strength, to go to such a manufacturer to purchase their own heart, do not have to worry about the purchase of direct reading spectrometer, after the later use of the problem can not find someone to be responsible for the problem.

There is no list of the top 10 brands, everyone is swiping tickets, anyway, the first direct reading spectrometer is made abroad, but this takes into account the cost, as well as maintenance, and the bottom is also a foreign brand.

There are many brands of direct reading spectrometers, and it is not clear who is who! Technology is constantly changing, and brand management is changing over time. So take a look for yourself, from the inside of the machine to the appearance of the machine, you can reflect the strengths and weaknesses of the brand.

There is never the best, only the most suitable brand and service.

Those who have used ARL are still relatively stable.

It is highly recommended: buy imported spectrometer, do pure copper, consider ARL's 4460 or 3460 and OBLF's GS1000 and QSN750, if Spike gives you lab, you can consider, don't think about others, don't just look at **, don't believe in the rhetoric of good quality and cheap distribution, bargain hard, don't be afraid! Domestic spectrometers wait for decades to see.

Full-spectrum optical emission spectroscopy (CCD) is more cost-effective than PMT.

First, the use of the most modern and most advanced CCD digital technology, to achieve the analysis of the spectrum of the full spectrum direct reading. The specially designed excitation light source has entered a new era in the composition analysis of metal materials. Excellent analytical performance, extremely short analysis time, extremely low operation and maintenance costs, and intelligent operation mode make sample analysis simple and easy.

2. Characteristics of full-spectrum direct reading spectrometer:

1. Vacuum light chamber technology, fast and stable.

2. Fingerprint technology, automatic best spectral line recognition.

3 Open electrode holder for analysis of samples of various shapes and sizes.

4. Automatic library addressing, eliminating tedious wave scanning.

5. Increase the types of analytical materials and analytical elements at any time.

6. Advanced CCD digital technology, full-spectrum direct reading of analysis spectrum.

7 Automatic optical path calibration, not affected by temperature drift, to ensure the accuracy of analysis.

8. Intelligent analysis mode, fast and accurate determination of the elemental composition in each metal material.

Fourth, the analysis speed is fast; High accuracy, relative error of about 1%; Suitable for a wide range of wavelengths; The photomultiplier tube has a strong ability to amplify the signal, and can use different magnifications for different spectral lines of strength, with a difference of up to 10,000 times, so it can be used to analyze a variety of elements in the sample with large differences in the content range under the same analytical conditions. Wide linear range for high-content analysis.