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A kind of solid-phase detection method of lead ion

A detection method and lead ion technology, applied in the field of solid luminescent materials, can solve the problems of relying on instruments and equipment, polluting the environment with waste water, complicated operation, etc., and achieve the effect of accurate solid-phase detection of Pb2+ ions

Active Publication Date: 2021-07-16
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these detection methods are all carried out in liquid, not only the operation is complex, highly dependent on instruments and equipment, but also will produce a large amount of waste water to pollute the environment

Method used

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  • A kind of solid-phase detection method of lead ion
  • A kind of solid-phase detection method of lead ion
  • A kind of solid-phase detection method of lead ion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Analytical pure P 2 o 5 , NaBr, Cs 2 O, SrO powder, according to 40P 2 o 5 :40NaBr:10Cs 2 The proportion of O:10SrO (mole percentage) is accurately weighed and placed in a mortar, mixed and ground evenly, placed in a quartz crucible, placed in a resistance furnace and heated to 680°C and then kept for 0.5 hours to melt; then, Take out the glass melt and quickly pour it into a mold to form it to obtain a block precursor glass; after crushing the glass block, put it into an agate ball mill jar, and ball mill it at 480 rpm for 0.5 hour to obtain a relatively uniform particle. Micron powder.

[0034] Mix x mg of lead fluoride powder with (1000-x) mg of precursor glass powder in an agate ball mill jar (x=0, 2.45, 4.90, 7.35, 14.70, 29.40, 36.75, 73.50, 122.5) Ball mill at 480 rpm for 0.5 hour, take the same mass of the mixture and detect it in the fluorescence detection system to establish the relationship between lead ion concentration and luminous intensity.

[0035...

Embodiment 2-5

[0038]The material components and process conditions of Example 1 were changed (see Table 1), and bulk glass was obtained through the processes of material mixing, grinding, melting, quenching of the melt, and grinding. After crushing the glass block, put it into an agate ball mill jar, and grind it at 500 rpm for 0.6 hours to obtain a micron-sized powder with relatively uniform particles; finally, mix x mg of lead oxide with (1000-x) mg of precursor glass The powder is mixed in an agate ball mill jar (x=0, 2.23, 4.46, 6.69, 13.38, 26.76, 33.45, 66.9, 111.5), and mixed evenly with the grinding revolutions and grinding time in Table 1, and the mixture of the same quality is taken in The fluorescent detection system detects and establishes the relationship between lead ion concentration and luminous intensity.

[0039] According to the same test method as in Example 1, CsPbBr is separated out on the surface when lead oxide is ground and mixed with glass powder 3 For the nanocry...

Embodiment 6-8

[0043] Change the material components and process conditions of Example 1 (see Table 1), and obtain bulk glass through processes such as material mixing, grinding, melting, melt quenching, and grinding; after the glass block is smashed, put it into an agate ball mill jar , Grind at 400 rpm for 1 hour to obtain a micron-sized powder with relatively uniform particles; finally, put x mg of lead nitrate and (1000-x) mg of precursor glass powder in an agate ball mill and mix (x=0, 3.31 , 6.62, 9.93, 19.86, 39.72, 49.65, 99.3, 165.5), and mix evenly with the number of grinding revolutions and grinding time in Table 2, get the mixture of the same quality and detect it in the fluorescence detection system to establish the relationship between lead ion concentration-luminescence intensity.

[0044] According to the same test method as in Example 1, CsPbBr is separated out on the surface when lead oxide is ground and mixed with glass powder 3 For the nanocrystalline phase, the detection...

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Abstract

The invention discloses a solid-phase detection method for lead ions, and specifically discloses a glass and its preparation method, and its application in solid-phase lead detection. When the glass powder is mixed with the external lead-containing powder to be tested, a large amount of CsPbBr is precipitated on the surface of the glass powder due to the phenomenon of mechano-induced crystallization. 3 Quantum dots, which exhibit bright narrow-band green emission under ultraviolet light. By establishing the relationship between the content of lead ions and the luminous intensity of the mixture, it is possible to detect lead ions conveniently, efficiently and accurately.

Description

technical field [0001] The invention relates to the field of solid luminescent materials, in particular to a solid-phase detection method for lead ions. Background technique [0002] With the development of science and technology, lead is widely used in society, such as gasoline, dyes, etc., and lead ions cannot be biodegraded, so they accumulate in the environment, resulting in food, water and soil pollution. Lead ions can enter the body through the skin, digestive tract, and respiratory tract and combine with various organs, causing serious damage to human health. Its main toxicity can lead to anemia, nervous system damage, reproductive system damage, etc. The World Health Organization strictly regulates the concentration limits of lead ions in water, food and soil. Therefore, research on accurate, rapid, high-sensitivity, and low-cost detection methods has attracted widespread attention. At present, the detection methods of lead ions mainly include spectral detection m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/643
Inventor 项小强林航王聪勇王元生
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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