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Nano-sensitive material for dichlorodiphenyltrichloroethane pesticide

A technology of bis-p-chlorophenyltrichloroethane and sensitive materials, which is applied in the field of doping nano-sensitive materials, can solve the problems of time-consuming and difficult to promote, and achieve high sensitivity and selectivity.

Inactive Publication Date: 2012-12-05
BIOCHEM ENG COLLEGE OF BEIJING UNION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The determination methods of bis-p-chlorophenyltrichloroethane pesticide mainly include gas chromatography, liquid chromatography, mass spectrometry, liquid-mass spectrometry, electrochemical method and spectrophotometry, etc., because these methods often require pre-enrichment and proper treatment can be completed by large analytical instruments, so it takes a long time and is not easy to popularize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Co-dissolve lanthanum nitrate, ferric sulfate and nickel chloride in the aqueous solution of dilute hydrochloric acid, add appropriate amount of citric acid under high-speed stirring state to keep the solution in a clear state, adjust the pH value to 2.8 with ammonia, and continue to stir for 6 hours, Standing and aging, the solution was rotary evaporated at 75°C to obtain a gel, and the gel was dried by infrared for 1 hour. After being fully ground, the temperature was raised to 560°C at a speed of no more than 5°C per minute in a high-temperature box-type resistance furnace, and kept At this temperature for 2 hours, La 2 o 3 , Fe 2 o 3 and NiO nanopowder;

[0014] (2) Palladium chloride is dissolved in the hydrochloric acid aqueous solution of 8% by mass fraction, under constant stirring, the above-mentioned nano-powder body that ultrasonic wave is dispersed is added wherein, continue to stir and dropwise add the aqueous solution of hydrazine hydrate that is 35...

Embodiment 2

[0018] (1) Co-dissolve lanthanum acetate, ferric chloride, ferric perchlorate and nickel nitrate in the aqueous solution of dilute hydrochloric acid, add an appropriate amount of citric acid under high-speed stirring to keep the solution clear, adjust the pH value to 3.0 with ammonia water, Continue to stir for 7 hours, let it stand for aging, rotate the solution at 71°C to obtain a gel, dry the gel by infrared for 1 hour, grind it thoroughly, and raise the temperature in a high-temperature box-type resistance furnace at a rate of no more than 5°C per minute to 590°C and keep this temperature for 2 hours to obtain La 2 o 3 , Fe 2 o 3 and NiO nanopowder;

[0019] (2) Palladium chloride is dissolved in the hydrochloric acid aqueous solution of 8% by mass fraction, under constant stirring, the above-mentioned nano-powder body that ultrasonic wave is dispersed is added wherein, continue to stir and dropwise add the aqueous solution of hydrazine hydrate that is 35% by mass fract...

Embodiment 3

[0023] (1) Co-dissolve lanthanum nitrate, lanthanum chloride, ferric chloride, nickel chloride and nickel nitrate in an aqueous solution of dilute hydrochloric acid, add an appropriate amount of citric acid under high-speed stirring to keep the solution clear, and adjust the pH value with ammonia water It is 3.7, continue to stir for 6 hours, let it stand for aging, rotate the solution at 84°C to obtain a gel, dry the gel by infrared for 1 hour, grind it thoroughly, and place it in a high-temperature box-type resistance furnace at a rate of no more than 5°C per minute. The speed is raised to 580 °C, and the temperature is maintained for 3 hours to obtain La 2 o 3 , Fe 2 o 3 and NiO nanopowder;

[0024](2) Palladium chloride is dissolved in the hydrochloric acid aqueous solution of 8% by mass fraction, under constant stirring, the above-mentioned nano-powder body that ultrasonic wave is dispersed is added wherein, continue to stir and dropwise add the aqueous solution of hyd...

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Abstract

The invention relates to a nano-sensitive material for monitoring a dichlorodiphenyltrichloroethane pesticide. The nano-sensitive material is characterized by consisting of Pd atom-doped La2O3, Fe2O3 and NiO nano-powder, wherein the Pd atom-doped La2O3, Fe2O3 and NiO nano-powder comprises the following components: 2 to 3 percent of Pd, 29 to 35 percent of La2O3, 38 to 44 percent of Fe2O3 and 18 to 24 percent of NiO; and the particle size range is 15 to 35nm. A dichlorodiphenyltrichloroethane pesticide sensor which is prepared from the sensitive material has a relatively wide linear range, is high in selectivity and relatively high in sensitivity, can monitor a trace amount of dichlorodiphenyltrichloroethane pesticide on line, and is not affected by coexisting substances.

Description

technical field [0001] The invention relates to a doped nano-sensitive material for monitoring bis-p-chlorophenyltrichloroethane pesticides, especially La doped by Pd atoms 2 o 3 , Fe 2 o 3 The sensitive material composed of NiO nanometer powder belongs to the field of sensing technology. Background technique [0002] With the development of agricultural industrialization, chemical pesticides are playing an increasingly important role in the production of agricultural products such as grain, vegetables, fruits, tea and medicinal materials in my country. However, because people do not have enough knowledge of the movement rules of pesticides in natural organisms, such as metabolic pathways, degradation methods, and residue accumulation, they often ignore the effects of chemical pesticides while enjoying the joy of harvest. harm. One of the key links to control the amount of pesticide residues in agricultural products is to conduct timely and accurate analysis and detecti...

Claims

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Application Information

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IPC IPC(8): G01N21/76
Inventor 周考文李鑫苏迪杨会竹沈旭
Owner BIOCHEM ENG COLLEGE OF BEIJING UNION UNIV
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