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定義
Definition
原子發(fā)射光譜儀是依據(jù)試樣中被測元素的原子或離子，在光源中被激起而發(fā)生特征輻射，經(jīng)過判別這種特征輻射波長及其強度的巨細，對各元素進行定性剖析和定量剖析的儀器。
Atomic emission spectrometer is based on atomic or ionic elements measured in the sample, in the light source and radiation characteristics is aroused, after distinguishing this feature and strength of the size of the radiation wavelength, qualitative analysis and quantitative analysis instrument for each element.
構成
constitute
原子發(fā)射光譜儀，是將成分雜亂的光分解為光譜線的科學儀器。它密封在一個溫度安穩(wěn)的恒溫機箱里，設計細巧，操作簡便，設備的轉移和操作只要一個人就能完結。這一類儀器通常包含：光源、單色器、檢查器和獨處器材。原子發(fā)射光譜儀配備了超高靈敏度的光電倍增管，在全量程規(guī)模內(nèi)使檢查器的動態(tài)規(guī)模能鑒別出成分的最細小的不一樣。原子發(fā)射光譜儀有火花原子發(fā)射光譜儀，光電原子發(fā)射光譜儀，手持式光譜儀，便攜式光譜儀，能量色散光譜儀，真空原子發(fā)射光譜儀等多種種類。原子發(fā)射光譜儀廣泛應用于鑄造、鋼鐵、金屬回收和鍛煉以及軍工、航天航空、電力、化工、高等院校和商檢、質檢等部分。
Atomic emission spectrometer is a scientific instrument to decompose the components of the component into the spectral line. It is sealed in a temperature stable constant temperature cabinet, delicate design, simple operation, transfer and handling equipment as long as a person can. This kind of instrument usually comprises a light source, monochromator, checker and equipment alone. Atomic emission spectrometer equipped with photoelectric ultra sensitive photomultiplier tube in the whole range of the scale of the dynamic scale checker can identify the smallest components are not the same. Atomic emission spectrometer with spark atomic emission spectrometer, atomic emission spectrometer, portable spectrometer, portable spectrometer, energy dispersive spectrometer, vacuum atomic emission spectrometer and other kinds of. Atomic emission spectrometry is widely used in casting, iron and steel, metal recovery and training and military, aerospace, power, chemical, higher education institutions and commodity inspection, quality inspection and other parts.
基本部件
basic components
一、激起光源
Light source
1、激起光源的效果
1, arouse the effect of light source
作為光譜剖析的光源對試樣都具有兩個效果：
The light source as the spectrum analysis has two effects on the sample:
*把試樣中的組分蒸騰、解離為氣態(tài)原子。
The transpiration and dissociation of the components in the sample are gaseous atoms.
*使氣態(tài)原子激起(即光源的首要效果是對試樣的蒸騰、解離和激起供給所需的能量)。
(the primary effect of the light source is the energy required for the transpiration, dissociation, and supply of the sample.
2、激起光源的請求
2, the request of the light source
激起能力強、靈敏度高、安穩(wěn)性好、構造簡略、操作便利、運用安全
The ability is strong, the sensitivity is high, the stability is good, the construction is simple, the operation is convenient, the application is safe.
3、常用的光源：直流電弧、低壓溝通電弧、高壓火花和電感耦合等離子體(ICP)等。
3, commonly used light source: DC arc, low voltage communication arc, high voltage spark and inductively coupled plasma (ICP), etc..
4、光源的挑選
4, the selection of light source
(1)、剖析元素的性質
(1) the nature of the elements
元素的揮發(fā)性，以及它們的電離電位直接影響該元素的蒸騰和激起。
The volatility of the elements, and their ionization potentials directly influence the transpiration and the.
(2)、剖析元素的含量
(2) analysis of the content of elements
對低含量元素，需求較高的肯定靈敏度，它不只與激起溫度有關，并且與蒸騰溫度有關。
For low content elements, the higher demand is positive, it is not only related to the temperature, but also related to the transpiration temperature.
(3)試樣的性質
(3) the properties of the sample
(4)、剖析任務
(4) analysis task
5、樣品導入光源的辦法：固體自電極法、粉末法、溶液法、氣態(tài)法
5, the sample into the light source: the solid self electrode method, the powder method, the solution method, the gas method
二、色散儀
Two, dispersion instrument
效果：將光源發(fā)射的不一樣波長的光色散變成光譜或單色光。
Effect: the source of different wavelengths of light dispersion into spectral or monochromatic light.
分類：按色散器材的不一樣可分為棱鏡色散儀和光柵色散儀。
Classification: according to the dispersion of the equipment is not the same as the prism dispersion instrument and grating dispersion.
構造：照明體系、準光體系、色散體系。
Structure: lighting system, quasi optical system, dispersion system.
三、檢查器
Three, checker
在原子發(fā)射光譜法中，常用的檢查辦法有：目視法、攝譜法和光電法。
In the atomic emission spectrometry, the commonly used inspection methods are: visual method, spectral method and photoelectric method.
這三種辦法基本原理都相同，都是把激起試樣取得的復合光經(jīng)過入射狹縫照射到分光元件上，使之色散為光譜。然后經(jīng)過丈量譜線而檢查試樣中的剖析元素，其差異就在于目視法用人眼去承受，攝譜法用感光板承受，光電法用光電倍增管承受。現(xiàn)在，廣泛運用的是攝譜法。
The basic principles of the three methods are the same, and the composite light which is made up of the sample is irradiated to the light splitting element through the entrance slit. And then through the measurement of spectral lines and inspection of the analysis of the elements in the sample, the difference lies in the visual method with the human eye to bear, and the use of photographic plate to bear, the photoelectric multiplier tube to bear. Now, widely used is the perturbation method.
