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Method for detecting ultra-trace copper ions in water

A detection method and technology for copper ions, which are used in general water supply conservation, measuring devices, and material analysis by observing the impact on chemical indicators, which can solve the problems of high instrument cost, unfavorable detection conditions, rapid detection, and long detection time.

Active Publication Date: 2021-09-10
HENAN ACADEMY OF SCI CHEM RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Existing detection methods for copper ion content mainly include: atomic absorption spectrometry, atomic emission spectrometry, iodometric method, inductively coupled plasma mass spectrometry, spectrophotometry, etc. However, these detection methods require high equipment costs and relatively long detection time. It is long, expensive, and has certain requirements on the experimental level of the experimenters. In the face of environmental pollution and a large number of samples to be tested, such detection conditions are not conducive to rapid on-site detection. Therefore, the development of a simple, fast, efficient, sensitive, low-cost Rapid detection method of cost has major implications

Method used

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Examples

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preparation example Construction

[0036] Preparation of standard color chart:

[0037] S1, the preparation concentration is 1×10 -2 mol / L, 1×10 -3 mol / L, 1×10 -4 mol / L, 1×10 -5 mol / L, 1×10 -6 mol / L, 1×10 -7 mol / L, 1×10 -8 mol / L, 1×10 -9 mol / L, 1×10 -10 mol / L copper ion standard solution;

[0038] S2, the preparation concentration is 1×10 -2 mol / L, 1×10 -3 mol / L, 1×10 -4mol / L, 1×10 -5 mol / L, 1×10 -6 mol / L, 1×10 -7 mol / L, 1×10 -8 mol / L, 1×10 -9 mol / L, 1×10 -10 The 2,9-dimethyl-4,7 diphenyl-1,10-phenanthroline solution of mol / L, makes chromogen;

[0039] S3, add the chromogen of step S2 in the copper ion standard solution of step S1, the concentration of copper ion standard solution is identical with the concentration of chromogenic agent, the volume ratio of copper ion standard solution and chromogenic agent is 1:2, shock Make it fully mixed, then let it stand for 10-30s, and adjust the pH to 6-8 with 0.5-1.0mol / L sodium hydroxide solution or 25-35% hydrochloric acid solution by volume fraction...

Embodiment 1

[0043] A method for detecting ultra-trace copper ions in water, comprising the steps of:

[0044] Pipette Cu 2+ The concentration is 1×10 -2 mol / L aqueous solution sample, add 1×10 -2 mol / L 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline solution, oscillated to mix and stand still, then inhaled into a syringe, and placed a filter head in a replaceable filter membrane Open the polyethersulfone filter membrane, install the filter head containing the replaceable filter membrane on the nipple of the syringe, use the syringe to push the complexation solution to flow through the polyethersulfone filter membrane, and then remove the polyethersulfone filter membrane.

Embodiment 2

[0046] Identical to the preparation steps of Example 1, the only difference is that the Cu taken from the aqueous solution sample 2+ The concentration is 1×10 -3 mol / L, add 1×10 -3 mol / L solution of 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline.

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Abstract

The invention relates to the technical field of rapid detection and analysis, in particular to a method for detecting ultra-trace copper ions in water. According to the invention, 2, 9-dimethyl-4, 7-diphenyl-1, 10-phenanthroline is taken as a color developing complexing agent, a polyether sulfone filter membrane is taken as an enrichment and separation material for a complex, the standard colorimetric card and the detection method for rapid detection of copper ions are provided, the method can be used for simply and rapidly detecting the concentration of copper ions, the detection sensitivity is very high, the experimental method is simple and convenient, and the rapid detection of trace or trace copper ions on site can be met. The detection capability of the copper ion concentration at the level of 1 * 10 <-10 > is realized, and the sensitivity of the method can be comparable with that of a large analytical instrument.

Description

technical field [0001] The invention relates to the technical field of rapid detection and analysis, in particular to a method for detecting ultra-trace copper ions in water. Background technique [0002] Water is the source of life on the earth, human beings, animals and plants cannot live without water, and water provides the necessary living conditions for the entire ecological environment. However, with the process of industrialization, people's material and cultural levels have been further improved, people's attention to environmental safety has been continuously increased, and the quality control of water quality has become increasingly strict. Therefore, people's attention to the heavy metal copper in water is increasing. [0003] Copper ions are non-ferrous metals that are closely related to human life and health. They are widely used in the fields of electronics industry, building materials, machinery development, chemical printing and dyeing, medicine, pesticides,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78G01N2021/775Y02A20/20
Inventor 李龙许轲韩黄做华许欣欣李宾宾赵亮
Owner HENAN ACADEMY OF SCI CHEM RES INST CO LTD
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