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Rapid detection method for heavy metals in water

A detection method and heavy metal technology, applied in measuring devices, instruments, material analysis through electromagnetic means, etc., to achieve good reproducibility, avoid the use of mercury, and low energy consumption

Pending Publication Date: 2021-07-09
上海雄图生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a rapid on-site detection method for heavy metal copper, zinc, lead, and cadmium in water quality, which can quickly and accurately detect the content of heavy metal copper, zinc, lead, and cadmium in water at the sampling site , Overcoming the defects of existing water heavy metal detection methods and technologies in field detection

Method used

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  • Rapid detection method for heavy metals in water
  • Rapid detection method for heavy metals in water
  • Rapid detection method for heavy metals in water

Examples

Experimental program
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Effect test

Embodiment 2

[0031] On-the-spot determination of heavy metal cadmium in embodiment 2 water samples

[0032] Step 1. Prepare a high-performance working electrode: put 5g of superconducting carbon black and 3g of ionic liquid N-hexylpyridine tetrafluoroborate into a stainless steel mortar, mechanically grind for 120 minutes under the protection of nitrogen and mix well, then put the mixture into Five internally threaded polytetrafluoroethylene tubes with an inner diameter of 10mm are compacted and formed, and the rear end of the externally threaded copper column is used as a wire. The structure is as follows figure 1 shown. Smooth on weighing paper before use. Twist the copper column, extrude the paste about 0.5mm and smooth it to renew.

[0033] Step 2. Assemble the three-electrode system sensor and connect it to a portable electrochemical analyzer: figure 2 , 3 As shown, the sensor includes a counter electrode, a reference electrode, a fixed plate 3 and a working electrode 5. In order...

Embodiment 3

[0038] On-site determination of heavy metal copper in embodiment 3 water samples

[0039] Step 1. Prepare a high-performance working electrode: put 5g of conductive carbon black and 3.2g of ionic liquid N-hexylpyridine nitrate into a ceramic mortar, mechanically grind for 120 minutes under the protection of nitrogen and mix well, and then put the mixture into 5 inner diameters 6mm internal threaded polytetrafluoroethylene tube, compacted and formed, the rear end of the external threaded copper column is the wire, the structure is as follows figure 1 shown. Smooth on weighing paper before use. Twist the copper column, extrude the paste about 0.5mm and smooth it to renew.

[0040] Step 2. Assemble the three-electrode system sensor and connect it to a portable electrochemical analyzer: figure 2 , 3 As shown, the sensor includes a counter electrode, a reference electrode, a fixed plate 3 and a working electrode 5. In order to shorten the detection time, a polytetrafluoroethyl...

Embodiment 4

[0045] On-the-spot determination of heavy metal zinc in embodiment 4 water sample

[0046] Step 1. Preparation of a high-performance working electrode: 5 g of conductive carbon black and 4 g of ionic liquid N-octylpyridine tetrafluoroborate were placed in a polytetrafluoroethylene mortar, mechanically ground for 120 minutes under nitrogen protection, and then mixed The mixture is put into five internally threaded resin tubes with an inner diameter of 6mm, compacted and formed, and the rear end of the externally threaded copper column is used as a wire. The structure is as follows: figure 1 shown. Smooth on weighing paper before use. Twist the copper column, extrude the paste about 0.5mm and smooth it to renew.

[0047] Step 2. Assemble the three-electrode system sensor and connect it to a portable electrochemical analyzer: the sensor includes a counter electrode, a reference electrode, a fixed plate and a working electrode, and the platinum column counter electrode, Ag / AgCl ...

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Abstract

The invention relates to the technical field of environmental monitoring, in particular to a method for rapidly detecting heavy metals in water, which comprises the following steps: step 1, preparing a high-performance working electrode: putting conductive carbon black or superconductive carbon black and ionic liquid in a certain mass ratio into a mortar, grinding for more than 50 minutes, fully and uniformly mixing, then putting into a tube, compacting and forming, wherein the rear end takes a copper column as a lead, the ionic liquid is N-octyl pyridine hexafluorophosphate, and the mass ratio of the N-octyl pyridine tetrafluoroborate to the N-octyl pyridine nitrate to the N-hexylpyridine hexafluorophosphate to the conductive carbon black to the ionic liquid is (2: 1)-(3: 1). According to the invention, the three electrodes of the sensor are all in a solid state, so that the sensor can be used in a static state and can also be used under the condition of certain shaking or vibration. The conductive carbon black ionic liquid paste electrode is used for replacing a mercury-based working electrode in the prior art, so that the use of mercury is avoided, the safety is good, and potential health and environmental pollution risks are avoided.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a method for rapid detection of heavy metals in water quality. Background technique [0002] The functions that water resources can play are severely limited by their environmental quality. Among them, heavy metal pollution has repeatedly aroused people's serious concern. Timely and accurate monitoring of the content of heavy metal elements in water quality is essential for effective assessment and early warning of pollution. [0003] For the analysis method of heavy metals in water quality, both high sensitivity and good selectivity must be ensured. At present, the generally accepted heavy metal analysis methods include ultraviolet spectrophotometry (UV), atomic absorption method (AAS), atomic fluorescence method (AFS), X-ray fluorescence spectroscopy (XRF), inductively coupled plasma mass spectrometry (ICP-MS), Immunological method (IA), test paper method (T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/30
CPCG01N27/48G01N27/308
Inventor 汪劲能陈菲菲
Owner 上海雄图生物科技有限公司
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