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Point discharge micro-plasma atomic emission spectrum analysis device in argon-hydrogen flame

A technology of atomic emission spectroscopy and micro plasma, which is applied in the field of atomic emission spectroscopy analysis, can solve the problems of limited excitation efficiency and achieve the effects of low cost, low energy consumption and reduced impact

Pending Publication Date: 2020-06-09
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the excitation efficiency of argon-hydrogen flame excitation atomic emission spectroscopy is very limited, and there is no report on its use as an excitation source for atomic emission spectroscopy analysis.

Method used

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  • Point discharge micro-plasma atomic emission spectrum analysis device in argon-hydrogen flame
  • Point discharge micro-plasma atomic emission spectrum analysis device in argon-hydrogen flame
  • Point discharge micro-plasma atomic emission spectrum analysis device in argon-hydrogen flame

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Embodiment 1: the tip discharge micro-plasma atomic emission spectrum excitation source and analysis device (such as figure 1 with 2 shown), the sample solution containing arsenic (As) (containing low-concentration hydrochloric acid) and the hydride generating reagent (containing low-concentration borohydride) are pumped into the chemical vapor generating reactor 13 through the peristaltic pump 12 to merge and react to produce Volatile hydride, the reaction solution is mixed with the working carrier gas of the working carrier gas system 14 through the three-way mixer 15 at the rear end of the chemical vapor generating reactor 13, and then enters the gas-liquid separator 16 to realize gas-liquid separation, and the waste liquid It is discharged from the waste liquid outlet 17. The separated sample vapor continues to be brought into the atomic emission spectrometry excitation source 19 by the working carrier gas, and first further removes moisture and matrix in the argon...

Embodiment 2

[0057] Embodiment 2: Similar to Example 1, the sample solution containing bismuth (Bi) passes through the tip discharge micro-plasma atomic emission spectrum excitation source and analysis device (such as in the argon-hydrogen flame of the present invention) figure 1 with 2 Shown) is analyzed, and the characteristic atomic emission spectrogram finally obtained, such as Figure 4 shown.

Embodiment 3

[0058] Embodiment 3: Similar to Example 1, the sample solution containing germanium (Ge) passes through the tip discharge micro-plasma atomic emission spectrum excitation source and analysis device (such as in the argon hydrogen flame of the present invention) figure 1 with 2 Shown) is analyzed, and the characteristic atomic emission spectrogram finally obtained, such as Figure 5 shown.

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Abstract

The invention provides a point discharge micro-plasma atomic emission spectrum analysis device in argon-hydrogen flame, sample steam containing elements to be detected and a shielding gas respectivelyenter an atomic emission spectrum excitation source (point discharge micro-plasma in the argon-hydrogen flame), and generated atomic emission spectrum signals are detected by a spectrum detector. Theexcitation source is composed of a point discharge part and an argon-hydrogen flame part which are coaxially arranged in series up and down, the point discharge part is a pair of tip electrodes whichare symmetrically arranged on the two sides of a ceramic fixing base, and a spectrum detection window is formed in the side face of the point discharge part; according to the argon-hydrogen flame part, an outer quartz tube is fixed to a base circle, the outer quartz tube and an inner quartz tube are coaxially arranged, the upper portion of the inner quartz tube is large, the lower portion of theinner quartz tube is small, the lower section of the inner quartz tube is located in a base center hole, a bottom opening serves as an inlet of a working carrier gas and the sample steam, and an inletof the shielding gas is formed in the outer quartz tube. The point discharge micro-plasma atomic emission spectrum analysis device has the characteristics of high atomization / excitation efficiency, high sensitivity, strong anti-interference capability (small interference between sample moisture and a matrix), good stability, low power consumption and the like.

Description

technical field [0001] The invention relates to atomic emission spectroscopic analysis technology, in particular to a tip discharge micro-plasma atomic emission spectroscopic analysis device working in an argon-hydrogen flame, which is used to detect the tip that can generate volatile compounds and can work in an argon-hydrogen flame Elements that are atomized / excited in the discharge microplasma. [0002] technical background [0003] As one of the important means of elemental analysis and detection, atomic spectrometry has been widely used in scientific research and production in many fields such as geology, environment, food, and biology. With the increasing demand for analysis and detection in modern society, it is not only necessary to develop new methods and new technologies for atomic spectrometers to provide better analytical performance, including sensitivity, detection limit, anti-interference ability, and range of analytical elements; Spectroscopy instruments are ...

Claims

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Application Information

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IPC IPC(8): G01N21/67G01N21/72
CPCG01N21/67G01N21/72
Inventor 蒋小明侯贤灯何林吴鹏
Owner SICHUAN UNIV
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