Atomic absorption spectrometer MGA

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2019-07-13 23:20:22

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In this article we will discuss the concept of atomic absorption spectrometer and field of study in which the instrument is used. We also pay attention to the General definition of analytical tools, various historical data and principles of the device used units.

Introduction

atomic absorption spectrometer

Before embarking on the study of atomic absorption spectrometers, it is important to be familiar with the concept of this spectroscopy – AAS. It is prevalent in areas of analytical chemistry as methodological tool for the analysis of elemental components based on atomic absorption spectral (absorption) for the specific contents of metals in salt solutions, these metals form. It's the same for natural and waste water, solutions of mineralization and other types of process liquids.

The Device, by which determine the parameters of AAS, called the atomic absorption spectrometer. Its main elements are presented in the form of light source, atomizer, spectral device, and electronic systems. To determine the element content in different samples, it is necessary to use experimentally obtained data about functional subordination between the signal that contains the analytical data and the concentration ratio of element in the solution, staying in a graduated form.

History methodology

atomic absorption spectrometer quantum 2ат manufacturer

The First who discovered the phenomenon of spectral lines absorbed by atoms, became a physician and chemist from England William Wollaston. His work was based on the analysis of the radiation of the solar spectrum. The discovery was made in the early nineteenth century. Some time later, this same phenomenon was discovered by the German physicist I. Fraunhofer. The correlation between emitted and absorbed spectrum and composition of the chemical nature of hot gases discovered by scientists from Germany Bunsen R. and G. Kirchhoff in the period from 1859 to 1861.

As an analytical measure of the spectral atomic absorption began to be used from 1930 and 1940 to identify the different basic chemical components in the stellar atmosphere. The same way determine the amount of mercury in a diverse set of samples and the atmosphere inside the room. The inconvenient caused by the lack of sensitive instruments.

Job Alana Walsh

atomic absorption spectrometer quantum

In 1955, Alan Walsh has been proposed is easily implemented method of determining the quantitative value of a specific type of element in the solution that is sprayed over the flame of acetylene burning in air. Here was the definition of absorbed radiation the atomic number of lines that radiated selective lamps. A. Walsh became the founder of the company Techtron, which in 1962 launched the first ever production of atomic absorption spectrometers. Later the industry was introduced graphite furnace, created by Boris Lvov and Hans Massmann.

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Means

The Instruments used for this analysis, presented in the form of precision highly automated devices that are able to reproduce the number of measuring conditions, and automatically enter the sample and record the measurement results. The device atomic absorption spectrometer represents the next set of components:

  • Source that emits light, which is characterized by a narrow line spectral nature typical of the analyte.
  • Atomizer – means the transfer of a particular substance in the pair of the atom.
  • Spectrometer – part of the mechanism that produce the characteristic analytical lines substances.
  • Electronic system operated for carrying out the detection, increase the capabilities and signal processing, analytical data bearing on the uptake.

Currently, there are many similar devices on the market for sale. Very widely used and common was atomic absorption spectrometer MGA. Currently, there are many generations of this instrument, each of which has a set of enhanced features and high performance accuracy. For example, in Russia you can often find the model MGA-1000.

Sources

Among the main requirements for the radiation source special place allocate their osmolarnosti, high stability in relation to the indicators of frequency and intensity. It is also important to take into account the high intensity of the resonance lines, a low level of noise, the absence of overlapping spectral nature in the line of resonance and its shumopoglaschayuschy ability, minimum cost of time to establish the operating mode and the ability to detect body glow minimum size.

Among the list of light sources the most important are: bulbs with full cathode lamp bezelektrodnogo type and lasers.

the device is an atomic absorption spectrometer

One of the machines that analyze the radiation of such sources, is the atomic absorption spectrometer QUANTUM-Z. One of its variants – AAS KVANT-Z. ETA. It finds its application in various fields of humanactivities. For example, in Geology, biological and chemical research, petrochemical, medicine and pharmacology, scientific research, etc.

QUANTUM-2АТ

Currently, there are a considerable number of similar devices. Consider the example of one of them.

One means to analyze radiation is atomic absorption spectrometer QUANTUM-2АТ. Most often it is used to: control the state of environment objects, the analysis of food number of products, raw materials, steel products, etc.

Among the major modes are:

  • Direct absorption of automation in the fire.
  • Automation in quantum cuvettes.
  • Atomic absorption, with a flow-injection concentration.
  • Atomic emission.

As a radiation source it uses the spectral type lamp with a hollow cathode. The power of the lamp is pulsed. Types of flame may include: air + propane, air-acetylene, nitrous oxide + acetylene. The spectrometer belongs to the group of ultrafast, single-beam devices, correcting non-selective absorption by the use of deuterium.

mga atomic absorption spectrometer

Brief on the installation requirements

Atomic absorption spectrometer QUANTUM is set in the closed premises with heating. It should be dry and placed away from heating devices and sources with the sharp air flow. The area of the room should not be below 10 metres squared and have a size of at least 30 cubic meters.

You Must have ventilation, and the burner need to place the umbrella relative to the spectrometer, and to provide it with damper for regulation. It is important to pay attention to the minimum level of requirements for issues such as dust and smoke.

atomic absorption spectrometer quantum z

Ceiling, flooring and wall coating needs to be in accordance with the requirements of technological hygiene. It is necessary that the air was free of impurities of substances possessing chemical activity. It is undesirable to place the device near sources of vibrations. Also it is desirable to have the sink and the sewer system in the room where the operation analyst.

About the manufacturer of the QUANT-2АТ

Manufacturer quantum absorption spectrometer QUANTUM-2АТ is the company “of kortek”. This is a very reliable supplier of such products, which the market has more than a dozen years, and since 1988, recognized as the leader in its field. The company has many branches, one of which is located in Moscow at the address: Nikulinskaya str., d. 27, KOR. 2. In addition to the spectrometers, they are also developing a variety of additional equipment, doing software and made spectral lamp, complete and supplies and not exempt from phototherapy. Very popular atomic absorption spectrometer QUANTUM-2АТ (producer "of kortek”). When you select the device it should be remembered that to date the company remains a leader in producing quality products.

atomic absorption spectrometer mga 915

MGA-915МД

Earlier, we mentioned the specific model of the device, namely, the atomic absorption spectrometer MGA-915МД.

Speaking about it in more details, we can note some of its features, that sets it apart from other models.

MGA-915МД high selectivity associated with the use of high-performance variants of the selective analysis by atomic absorption. The analyzer system MGA-915МД is highly selective and allows to determine the amount contained in a wide range of elements in the sample with any type of makeup. Siemanowski corrective method is non-selective absorption and AAS are called "reference methods" in relation to the determination of even small amounts of contained elements in a sample with a complicated composition.

The high sensitivity allows to increase the limit of detection to the level of the best spectrometers that we can offer in the market.

This model is absolutely automated mechanism with the change of the radiation source and establish specifically the necessary resonance lines in standalone mode. It has a turret on the six lamps. The sampler with 55 cells is a system of input samples in the MGA-915МД. Data in a continuous transfer to the automated control system to further control the process technology. The air is analyzed by applying the method of electrostatic deposition of aerosols air directly into the atomizer graphite type.


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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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