1. atomic absorption spectrometerShouldWith:

Because of its high sensitivity, less interference, simple and rapid analysis method, atomic absorption spectrometer is widely used in metallurgy, geology, mining, petroleum, light industry, agriculture, medicine, health, food, environment, scientific research and other fields of constant and micro trace elements analysis. At present, atomic absorption has become one of the powerful tools for elemental analysis, organic matter analysis and metal chemical speciation analysis, and it is also used as a standard analysis method in many fields.

 

In the pharmaceutical industry, atomic absorption spectrometer can improve the efficiency and compliance of drug production quality control laboratories through fast, accurate and sensitive determination and simple operating system, and calmly cope with increasingly strict supervision.

 

In the food industry, for food, food additives, feed trace nutrients and heavy metals, atomic absorption spectrometer can be accurate and sensitive determination characteristics, to provide economic, in line with standard requirements and reliable analysis results.

 

In the field of environmental safety, the environmental matrix is seriously disturbed, the detection limit is strict, and the sample size is huge, which are inevitable problems in the detection of environmental samples. Atomic absorption spectrometer can effectively solve these problems.

 

In the fields of petrochemical and industrial pollution, atomic absorption spectrometer can easily cope with all kinds of samples with its complete corrosion resistance, accuracy, speed and durability.

2. atomic absorption spectrometerWorkPrinciple:

The working principle is that the instrument radiates the light of the characteristic spectral line of the element to be measured from the light source, which is absorbed by the ground state atom of the element to be measured in the steam when passing through the sample steam, and the content of the element to be measured in the sample is determined by the degree to which the radiation characteristic spectral line light is weakened.

 

The so-called atomic absorption refers to the absorption phenomenon of gaseous free atoms for the characteristic spectral radiation emitted by the same kind of atoms. To apply this atomic absorption phenomenon to chemical quantitative analysis, first of all, the elements to be tested in the sample solution must be atomized, and at the same time, a light source with stable intensity must be provided to give the same atomic spectral radiation, so that it can pass through a certain area of the elements to be tested, thus measuring its extinction value, then according to the extinction value compared with the standard solution concentration relationship curve, calculate the content of the element to be measured in the sample . It enables sensitive and reliable determination of trace or trace elements.

 

Atomic absorption spectrometer isA device for measuring the absorbance of the element to be measured by its atomic vapor using resonance radiation. It has a single beam, double beam, double channel, multi-channel structure. Its basic structure includesFive parts:

3. atomic absorption spectrometerStructureComposition and detection method:

1. Light source: produces light with wavelengths characteristic of the element being analyzed. Common hollow-core cathode lamps (HCL), stepless discharge lamp (EDL) and super intensity lights (UltrAA Lamp).
2. Atomizer: The proportional conversion of the analyzed element in a sample into free atoms. The energy required is usually heating. The most common method is to use air-acetylene, nitrous oxide-acetylene fire Flame and electric heating. Atomized atoms absorb light.
3. Optical system: directs light into the atomic vapor and outgoing light into the monochromator.
4. Mono-chromator: The characteristic wavelength of a particular element under analysis produced by an elemental lamp is separated from other non-characteristic wavelengths.
5. Detector: A photosensitive detector (usually a photomultiplier tube) accurately measures the light intensity and converts it into an electrical signal
6. Electronic circuit: converts the corresponding value of the detector into a useful analysis measurement value.

There are three detection methods:

1. Atomic absorption flame method: measurable elements70remaining species,Generalcan be detectedPPMLevel(10)Precision1%Left and right. The flame method has the advantages of simple operation, good reproducibility, large effective optical path and high sensitivity to most elements, so it is widely used. The disadvantage is:Atomization efficiency is low, sensitivity is not high enough, and generally can not directly analyze solid samples.
2. Atomic absorption hydride method: the use of hydride generator, can be low melting point arsenic.(As)Antimony(Sb)Germanium(Ge)Tellurium(Te)Trace detection of other elements (PPblevel). General sensitivity inNg/mlLevel(10), relative standard deviation2%Left and right.
3. Atomic Absorption Graphite Furnace Method: High Atomization Efficiency, Small Sample Volume,Sample utilization rate at adjustable high temperature100%, high sensitivity (PPbLevel), some elements can also be analyzedpg/mLLevel. Can be measured near60The remaining elements. However, the graphite furnace method has a greater impact on the inhomogeneity of the sample composition, the determination precision is low, the interference of coexisting compounds is greater than that of the flame method, the interference background is more serious, and the background generally needs to be corrected.
4. 

FourAtomic Absorption SpectrometerThe main recommended parameters andList of configuration recommendations:

1According to the national standard analysis method for quantitative determination of food, clinical biological samples, water, soil and other (constant, trace or trace) metal elements.

2Safety: to complyEMCStandards and Chinese National Standards

3The working conditions are:

Power Requirements: 230V(+5%~-10%），50/60Hz;5000VA

Ambient temperature: 15℃~ 35℃

Relative humidity:20~80%

4The recommended configuration list is:

 

• atomic absorption spectrometerUse and maintenance of compressed air

1. Periodically check whether the pipe, valve joints and other parts are leaking. Leakage should be timely repair or replacement.
2. Always check whether there is water in the circuit of the air compressor. If water is stored, it should be removed in time. The water in the water reservoir and water distribution filter should be discharged frequently to avoid excessive water accumulation and bring water to the flowmeter.
3. Right.Noise-free air compressor,IfOil lubrication is used, oil and water in the filter and gas storage tank should be discharged regularly, and whether the compressor cylinder needs to be refueled should be inspected frequently. The instrument is placed in a humid environment for a long time or there is water in the gas path. Under the condition that the machine is not used frequently, it will rust the valves and interfaces in the gas path, causing the air holes to be blocked and the gas path to be blocked.
4. When the gas path is blocked,should be takenas followsMethod inspection:Close the main valve of acetylene and other flammable gases, open the air compressor, and check whether there is gas discharge from the air compressor. If not, it indicates that there is a problem with the air compressor, and professionals should be found for maintenance at this time. If there is gas discharge, connect the output of the air compressor to atomic absorptiondisc instrumentAt the entrance of the combustion booster, open the cover plate of the instrument, check the ventilation pipe section by section, find out the blocked position and eliminate it. When reinstalling, pay attention to the tightness of the interface to ensure that the interface does not leak. Then connect the air compressor output port to the atomic absorptionSpectrometerGas input port, check section by section according to the above method, and eliminate them one by one,until all are blockedTroubleshooting.

• selection of oil free compressor:

Atomic absorption spectrometer is a precision instrument, It has the characteristics of high sensitivity, high safety, high stability, involving many parameters and multi-field use but prone to failure. In order to ensure the normal use and prolong the service life of the various functional components of the instrument,To be checked frequently, as a flame auxiliary equipment.The air compressor should ensure that the connection does not leak, and it also needs convenient daily operation, safe and durable, and low noise,Save time and effort in maintenance,Low maintenance difficulty.Oil-free air compressors are more suitable for analysis, testing or quality control in the operation of atomic absorption spectrometers, while the oil and gas in oil-free air compressors will affect valves, nozzles, pollute the air, and more seriously affect the measurement data and affect the test results..The air compressor must meet the following requirements: oil-free and quiet operation. In the measurement of flame absorption, after turning on the fan switch of the air compressor, the air pressure is stable0.2-0.25MPaAfter,WertherThe oil-free air compressor system produces air in full compliance.ISO8573-1The standard specifies air quality requirements and is therefore particularly suitable for sensitive laboratory applications.

 

At present, there are 2. 30 kinds of atomic absorption spectrometer brands in the domestic market. Importers, including PerkinElmer.PE, thermoelectric (formerlyUNICAM), Varian, Jena,GBCShimadzu, Japan, Hitachi, Liman, Wiglas and CanadaAURORAetc.; domestic manufacturers,There are mainly Beijing Ruili (formerly North Erguang), General Analysis, East-West Electronics, Shanghai Jingke (formerly Shanghai Branch), Kechuang Haiguang, Hanshi Production Institute, Shanghai Tianmei, Beijing Huayang, Bohui Innovation, Shanghai Spectrum, etc..basically covers the mainstream of atomic absorption spectrometer manufacturers at home and abroad.

 

In terms of atomic absorption market share, three companies from the United States, Perkin Elmer, are importers.PE, thermoelectric and Varian are the top three manufacturers, both usingWERTHEROriginal imported silent oil-free air compressor.

 

Our high qualityPC90Series without oilThe compressor, due to its small size, isatomic absorption spectrometerThe ideal choice. They are characterized by efficient and durable performance:SuchInEquipmentduring the entire service life,No maintenance of the compressor is required.

 

Italy WERTHERgroup,After 40 years of development, it has become a world-renowned compressor and vacuum pump manufacturer. By virtue25Years of compressor manufacturing experience, especially in silent oil-free compressors (noise below45 decibel) field has an absolute technical advantage.

 

Tianjin Liankesi Technology Development Co., Ltd.as Italy WERTHERExclusive agent in China, providing high-quality pre-sale, in-sale and after-sale life cycle services.

 

WertherAir compressor is widely used in laboratory:Nuclear magnetic resonance, tensile testing machine, blood analysis equipment, humidity meter, laser particle size analyzer, atomic absorption meter,Peak,Parker,Claind, and other brands of nitrogen generator,AgilentAgilent,Thermo FisherSyme fly,AB SCIEX,Watersand other brands of gas chromatograph and gas mass spectrometer,EISS,FEI, Hitachi, JeolSuch as brand electron mirror supporting. Medical industry:Dental matching air compressor,ICU,Centralized air supply in the operating room, pneumatic ballistic lithotripsy.WertherCompanyhas been focused onMedicine, environment, food and other fieldsOil-free compressor available, its authorized agent in China, Tianjin Lianke Sichuang Technology Development Co., Ltd.Due to years of experience, we haveAbilityAdvise you from the idea of the project to the installation and make sure you are satisfied after the purchase. We are happy to advise you, please contact us.

 

Tianjin Lianke Sichuang Technology Development Co., Ltd. is a domestic integrated supplier dedicated to R & D, design, assembly, and production of compressed air systems and post-processing and supporting equipment. It has independent intellectual property rights and a number of technical patents.

 

Our company is a high-tech enterprise recognized by Tianjin municipal government,We have a professional R & D team, which can provide integrated services of design, R & D, production and sales according to customer requirements. Over the years, adhering to the "quality-oriented, technology-oriented, service-leading" business philosophy, and has been determined to continue to innovate, improve the management system, and constantly enhance the competitiveness of products. Welcome friends from all walks of life to contact and cooperate to discuss!

Sales Hotline:15822721002(Manager Zhang)

Electronic E-mail:rosezhang@linkstrong-tech.com

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Company Website:www.linkstrong-tech.com.cn