Atomization device and atomization method

An atomization and atomizer technology, which is used in measuring devices, material analysis by optical means, instruments, etc., can solve the problems of blockage, blockage, atomization efficiency, and stability of atomizers, and achieves elimination of precipitation and stability. impurities, ensure measurement accuracy, and reduce the effect of clogging

Active Publication Date: 2019-12-20
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing nebulizers are often clogged during use, resulting in reduced atomization efficiency and stability, which seriously affects the accuracy and sensitivity of the atomic absorption spectrophotometer
The main reason for the clogging is that most of the elements to be tested in the solution to be tested are heavy metal elements. Heavy metal elements are prone to form a small amount of precipitation under alkaline conditions, which cannot be detected by the naked eye. At the same time, the solution to be tested will also contain trace impurities. When the liquid flows through the atomizer, sediment and impurities are deposited in the atomizer, and blockage will occur after a long time

Method used

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  • Atomization device and atomization method

Examples

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Embodiment 1

[0031] Such as figure 1 Shown is an embodiment of the atomization device of the present invention, comprising an atomizer 1 and an atomization chamber 2 connected to the output end of the atomizer 1, and is characterized in that the input end of the atomizer 1 is connected with a The acid box 3 of the acid solution, the acid box 3 is provided with an inlet for allowing the liquid to be tested to flow in; the acid box 3 is connected with an empty box 4, and the connection between the acid box 3 and the empty box 4 is provided with An ion exchange membrane 5 that allows the metal ions to be measured to pass through.

[0032] When this embodiment is implemented, the metal ion precipitation in the liquid to be tested reacts with the acid solution to dissolve it in the solution, eliminates the precipitation and impurities in the liquid to be tested, and reduces the clogging of the atomizer 1; and the ion exchange membrane 5 hinders The metal ions enter the empty box 4, thereby eff...

Embodiment 2

[0039] Such as figure 2 Shown is an embodiment of the atomization method of the present invention comprising the following steps:

[0040] S10. Adding mm mL of acid solution to the acid tank 3, the solution to be tested containing metal ions flows into the acid solution, and the metal ion precipitation reacts with the acid solution to release metal ions;

[0041] S20. After the reaction in step S10 ends, extract n mL of solution into the empty box 4, and keep the concentration of metal ions in the acid box 3 constant;

[0042] S30. After being processed in step S20, the solution in the acid tank 3 enters the atomizer 1 for atomization, and the solution in the empty tank 4 flows into the waste liquid tank 8 for storage or waste liquid treatment.

[0043] In step S10, the pH of the liquid to be tested is >7, and the pH of the acid solution is ≤4. Under this condition, a large amount of metal ions in the liquid to be tested are converted into metal hydroxide precipitates, and ...

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Abstract

The invention relates to the technical field of metal element analysis, in particular to an atomization device and an atomization method. The atomization device comprises an atomizer and an atomization chamber connected to the output end of the atomizer and is characterized in that the input end of the atomizer is connected with an acid box injected with an acid liquid, and an inlet allowing a to-be-tested liquid to flow in is formed in the acid box; and the acid box is communicated with an empty box, and an ion exchange membrane which does not allow to-be-measured metal ions to pass is arranged in the connection position of the acid box and the empty box. Metal ions in the to-be-measured liquid precipitate and react with the acid liquid to be dissolved in a solution, precipitates and impurities in the to-be-measured liquid are eliminated, and the blocking phenomenon of the atomizer is reduced; the ion exchange membrane is arranged to block the metal ions from entering the empty box from the acid box, and the volume of the solution extracted from the acid box to the empty box is controlled to be equal to that of the added acid liquid, so that the concentration of the metal ions inthe acid box is kept unchanged, and the measurement accuracy of an atomic absorption spectrophotometer is guaranteed.

Description

technical field [0001] The invention relates to the technical field of metal element analysis, and more specifically, to an atomization device and an atomization method. Background technique [0002] Atomic absorption spectrophotometer, also known as atomic absorption spectrometer, analyzes metal elements according to the effect of material ground state atomic vapor on characteristic radiation absorption. It mainly consists of four parts: light source, atomizer, spectroscopic system and detection system. The atomization process of the liquid to be tested is completed in the atomization device, and the liquid to be tested is converted into free atom vapor (ground state atoms) by the nebulizer, so as to absorb characteristic radiation. As an important component, the nebulizer's performance has a significant impact on the precision of the measurement and chemical interference. [0003] The existing nebulizers are often blocked during use, resulting in reduced atomization effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/01G01N1/40
CPCG01N21/3103G01N21/01G01N1/4044G01N2021/3107G01N2021/0112
Inventor 史周琨胡永俊
Owner GUANGDONG UNIV OF TECH
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