A kind of detection method of metal element
A detection method and metal element technology, applied in the direction of measuring devices, color/spectral characteristic measurement, instruments, etc., can solve the problems of threats to the human body and the environment, fluctuations in potassium ion detection results, and difficulty in determining the authenticity and stability of data, etc. Achieve the effect of low detection limit, small standard deviation and lower detection limit
Active Publication Date: 2021-06-08
GUANGZHOU ZHONGJING ENVIRONMENTAL MONITORING CO LTD
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Problems solved by technology
[0003] Yet, generally need to add lanthanum nitrate in the above-mentioned method process as deionization agent, and when lanthanum nitrate encounters combustibles on fire, can promote the intensity of a fire, and the mixture with combustibles is easy to catch fire, and can burn violently; Lanthanum nitrate solution is mixed with other solutions, It is easy to form complexes, which can exist uniformly in the solution, causing the detection results of potassium ions in the atomic absorption spectrophotometer to fluctuate easily, making it difficult to determine the authenticity and stability of the data; Toxic nitrogen oxide gas poses a potential threat to the human body and the environment
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Embodiment 1
[0028] Embodiment 1 Detection of metal elements:
[0029] The deionizer comprises the following components in parts by weight: 12.5 parts of deionized water, 1.5 parts of potassium chloride, 0.65 parts of rubidium chloride, 1.35 parts of modified yttrium oxide, and 6.5 parts of hydrochloric acid solution.
[0030] The preparation method of described modified yttrium oxide comprises the following steps:
[0031] (1) Mix yttrium oxide powder and 2-aminoethanesulfinic acid in the mixture of ether and n-butanol, heat to 55°C, stir for 55 min, and the stirring speed is 1200r / min; the mixture of ether and n-butanol The mass ratio of ether and n-butanol in the mixture is 1:2.2; the mass ratio of the yttrium oxide powder to 2-aminoethanesulfinic acid is 13:1, and the mass ratio of the yttrium oxide powder to ether and n-butanol mixed solution The mass ratio is 1:20;
[0032] (2) Add poloxamer whose weight is 0.5 times the weight of yttrium oxide powder to the mixture in step (1), he...
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Abstract
The invention relates to the technical field of analysis and detection of metal elements, and relates to an analysis and detection method for detecting metal elements in the air. The method relates to a solution of an ionizer, which contains the following raw materials in parts by weight: 10-15 parts of ionized water, 1-2 parts of potassium chloride, 0.5-0.8 parts of rubidium chloride, 1-1.5 parts of modified yttrium oxide, 5-8 parts of hydrochloric acid solution; among them, during the preparation of the sample solution, added The deionizer solution not only avoids the fluctuation of test results caused by the mixing of lanthanum nitrate solution and other solutions in the traditional method, it can accurately, quickly and stably determine the metal elements and their compounds in the air, but also avoids the traditional method. Lanthanum nitrate releases highly toxic nitrogen oxide gas; this method can significantly reduce the detection error, obtain a lower detection limit, and is stable and reproducible.
Description
technical field [0001] The invention relates to the technical field of analysis and detection of metal elements, and relates to an analysis and detection method for detecting metal elements in air. Background technique [0002] In order to ensure national health and economic development, my country has promulgated and implemented documents on occupational disease prevention and workplace limits. In the workplace, solid harmful metal element pollutants in the air are not degradable. The existence of harmful metal elements not only seriously pollutes the environment but also poses a great potential threat to the human body. At present, there are many methods for the determination of metal elements in the air. Among them, atomic absorption spectrophotometry is the most widely used. Taking the determination of potassium in the national standard GBZ / T 300.22-2017 as an example, this method has low detection limit and high accuracy. The principle is that the aerosol state water-s...
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IPC IPC(8): G01N21/31G01N33/00
Inventor 李红霞马留芳曹普美陈森平张敏谢泽敏林镇
Owner GUANGZHOU ZHONGJING ENVIRONMENTAL MONITORING CO LTD