Elemental Analyzer Details
Elemental analyzers are indispensable analytical tools for chemical composition analysis. They are used in academia and industry and can be used for the analysis of pure substances or mixtures to ascertain the weight percentage of the elements they contain.
The principle of quantitative analysis is to convert the material to be analyzed in the presence of an oxidation catalyst such as copper oxide to complete combustion using oxygen, to convert it into oxides of carbon dioxide, water, nitrogen, and nitrogen; and to reduce nitrogen oxides to nitrogen by using copper. Traditionally, two U-shaped absorption tubes are respectively used to fill magnesium perchlorate to absorb moisture, and sodium hydroxide absorption tubes distributed on asbestos are used to absorb carbon dioxide. The weight difference between the two absorption tubes before and after the analysis can be measured respectively. Generated moisture and carbon dioxide. If the gas mixture generated by combustion is passed into potassium hydroxide solution and the volume of nitrogen is measured, the weight percentage of nitrogen can be obtained by using the gas law. The above conventional method requires a relatively large amount of sample, and the operation is time-consuming, and it has been automated. Replaced by analytical methods.
The analysis method of this instrument is to use a vertical combustion tube. The material to be analyzed is contained in a tin metal container and placed on an automatic sample feeder. Using the principle of gravity, a combustion tube of about 1150° C. is periodically added, and the sample is supported under the combustion of tin. The combustion temperature is as high as 1800°C to promote the complete combustion of the sample. After the copper reduction treatment, the resulting N2, CO2, and H2O mixture is separated by a special separation tube, and the content can be determined using a thermal conductivity detector (TCD). The processor operation can automatically calculate the weight percentage of carbon, hydrogen and nitrogen.
Users should pay attention to the following issues when purchasing instruments according to their needs:
1, according to the company's products need to order According to corporate product needs, the purpose of purchasing equipment is to ensure that the company's own product quality is controlled, so pay attention to the instrument's adaptability to the company's products, like the pre-fire test as fast as possible to test, come Material inspections are best able to print test reports, and finished product inspections must take into account the authority of the instrument. The single product such as steel, wire rope and other production units can reduce the professional requirements of the instrument, and companies such as cast copper alloys, aluminum alloys, stainless steel, etc. should pay special attention to the professionalism of the instrument, generally speaking, professional and strong instrument testing. More accurate and convenient.
2, according to the size of the company decided to order according to the size of the instrument demand is generally divided into large, medium and small categories. Large-scale enterprises can generally be equipped with high-frequency infrared carbon-sulfur analyzers and direct-reading spectrometers. The cost of laboratories can be controlled at around 1 million yuan. Enterprises with relatively simple conditions and no economic prosperity may consider setting up non-aqueous carbon-sulfur analyzers, Type 721 spectrophotometers, and Model 328AB analytical balances to build laboratories, and build a 15 square laboratory with a total price of less than 10,000 yuan. yuan. As most domestic enterprises in China currently have to meet quality control needs and do timely and accurate tests, they can be equipped with a high-volume carbon-sulfur high-speed analyzer and a computer element analyzer. Laboratories cost between 15,000 yuan and 18,000 yuan. Non-ferrous metal manufacturers do not need to determine the content of carbon and sulfur elements, as long as the purchase of a computer multi-element analyzer and sample balance, together with all chemical glassware and a full set of chemical reagents, the total price will also be around one million.
3. The quality, price and service of products with stable quality and timely service are mainly considered the service capabilities of the instrument suppliers. At present, the quality of high-end product instruments such as large-scale direct-reading spectrum is better than that of domestic products. The prices are not comparable, and the quality and performance of domestic mid-range instrument products are much the same, and the functions are slightly different.
4, buy a reasonable price of the product in service Generally speaking, manufacturers than the merchant service quality is better, there are sales outlets more timely services, but also depends on the various manufacturers of social open services. Commitment content, especially considering the maintenance of the equipment outside the warranty period and the supply of spare parts and consumables.
The principle of quantitative analysis is to convert the material to be analyzed in the presence of an oxidation catalyst such as copper oxide to complete combustion using oxygen, to convert it into oxides of carbon dioxide, water, nitrogen, and nitrogen; and to reduce nitrogen oxides to nitrogen by using copper. Traditionally, two U-shaped absorption tubes are respectively used to fill magnesium perchlorate to absorb moisture, and sodium hydroxide absorption tubes distributed on asbestos are used to absorb carbon dioxide. The weight difference between the two absorption tubes before and after the analysis can be measured respectively. Generated moisture and carbon dioxide. If the gas mixture generated by combustion is passed into potassium hydroxide solution and the volume of nitrogen is measured, the weight percentage of nitrogen can be obtained by using the gas law. The above conventional method requires a relatively large amount of sample, and the operation is time-consuming, and it has been automated. Replaced by analytical methods.
The analysis method of this instrument is to use a vertical combustion tube. The material to be analyzed is contained in a tin metal container and placed on an automatic sample feeder. Using the principle of gravity, a combustion tube of about 1150° C. is periodically added, and the sample is supported under the combustion of tin. The combustion temperature is as high as 1800°C to promote the complete combustion of the sample. After the copper reduction treatment, the resulting N2, CO2, and H2O mixture is separated by a special separation tube, and the content can be determined using a thermal conductivity detector (TCD). The processor operation can automatically calculate the weight percentage of carbon, hydrogen and nitrogen.
Users should pay attention to the following issues when purchasing instruments according to their needs:
1, according to the company's products need to order According to corporate product needs, the purpose of purchasing equipment is to ensure that the company's own product quality is controlled, so pay attention to the instrument's adaptability to the company's products, like the pre-fire test as fast as possible to test, come Material inspections are best able to print test reports, and finished product inspections must take into account the authority of the instrument. The single product such as steel, wire rope and other production units can reduce the professional requirements of the instrument, and companies such as cast copper alloys, aluminum alloys, stainless steel, etc. should pay special attention to the professionalism of the instrument, generally speaking, professional and strong instrument testing. More accurate and convenient.
2, according to the size of the company decided to order according to the size of the instrument demand is generally divided into large, medium and small categories. Large-scale enterprises can generally be equipped with high-frequency infrared carbon-sulfur analyzers and direct-reading spectrometers. The cost of laboratories can be controlled at around 1 million yuan. Enterprises with relatively simple conditions and no economic prosperity may consider setting up non-aqueous carbon-sulfur analyzers, Type 721 spectrophotometers, and Model 328AB analytical balances to build laboratories, and build a 15 square laboratory with a total price of less than 10,000 yuan. yuan. As most domestic enterprises in China currently have to meet quality control needs and do timely and accurate tests, they can be equipped with a high-volume carbon-sulfur high-speed analyzer and a computer element analyzer. Laboratories cost between 15,000 yuan and 18,000 yuan. Non-ferrous metal manufacturers do not need to determine the content of carbon and sulfur elements, as long as the purchase of a computer multi-element analyzer and sample balance, together with all chemical glassware and a full set of chemical reagents, the total price will also be around one million.
3. The quality, price and service of products with stable quality and timely service are mainly considered the service capabilities of the instrument suppliers. At present, the quality of high-end product instruments such as large-scale direct-reading spectrum is better than that of domestic products. The prices are not comparable, and the quality and performance of domestic mid-range instrument products are much the same, and the functions are slightly different.
4, buy a reasonable price of the product in service Generally speaking, manufacturers than the merchant service quality is better, there are sales outlets more timely services, but also depends on the various manufacturers of social open services. Commitment content, especially considering the maintenance of the equipment outside the warranty period and the supply of spare parts and consumables.
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