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A detection preparation and detection method for pediatric heavy metal ions

A heavy metal ion and detection method technology, which is applied in the field of detection preparations for pediatric heavy metal ions, can solve problems such as the inability to detect lead ions and cadmium ions at the same time, affect the accuracy of detection results, and expensive instruments, etc., to improve electrochemical transmission. Sensitive performance, rapid transmission of electrochemical signals, efficient and accurate detection

Inactive Publication Date: 2020-10-13
QINGDAO WOMEN & CHILDREN HOSPITAL
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  • Description
  • Claims
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Problems solved by technology

Among them, the equipment required for inductively coupled plasma mass spectrometry and atomic absorption spectrometry is expensive, and it is difficult to popularize in areas with relatively poor economic conditions, resulting in limited application
The patent with the publication number CN110286107A provides a detection method for heavy metal lead ions. The patent uses a fluorescence method to quantitatively detect lead ions by preparing a ratio fluorescent probe, but this method can only detect a single type of heavy metal ions. Simultaneous detection of lead ions and cadmium ions cannot be realized, which has great limitations in practical applications
[0005] In order to realize the simultaneous detection of lead ions and cadmium ions, the patent with the authorized announcement number CN104535640B provides a method for simultaneously detecting cadmium and lead ions by using thiol and peroxidized polym-phenylenediamine modified bismuth film electrodes. The electrochemical method realizes the simultaneous detection of cadmium and lead ions by modifying the bismuth film electrode; however, the bismuth film used in this patent will cause the electrode area to change continuously during use, resulting in repeated Poor performance, which affects the accuracy of the test results

Method used

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  • A detection preparation and detection method for pediatric heavy metal ions
  • A detection preparation and detection method for pediatric heavy metal ions
  • A detection preparation and detection method for pediatric heavy metal ions

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Embodiment 1

[0059] This embodiment provides a detection preparation for pediatric heavy metal ions, which detection preparation includes perfluorosulfonic acid-polytetrafluoroethylene copolymer solution and uniformly dispersed in the perfluorosulfonic acid-polytetrafluoroethylene copolymer solution The electrode modification material; the mass fraction of the perfluorosulfonic acid-polytetrafluoroethylene copolymer solution is 5%; the mass volume ratio of the electrode modification material and the perfluorosulfonic acid-polytetrafluoroethylene copolymer solution The electrode modification material of 3.5mg: 1mL is prepared by the following steps:

[0060] S1. Mix 10g of melamine with 5g of polyethylene glycol octylphenyl ether, stir in an oil bath at 100°C for 1 hour, then add concentrated sulfuric acid drop by drop and stir thoroughly, gradually forming a white precipitate. After the precipitate no longer increases, The solution was naturally cooled to room temperature, filtered and was...

Embodiment 2～16

[0087] Embodiments 2 to 16 respectively provide a detection method for pediatric heavy metal ions. Compared with Embodiment 1, the difference is that the dosage of the electrode modification material, the relevant parameters in the preparation process of the electrode modification material or the detection process are adjusted. The enrichment time, the rest of the steps are consistent with Example 1, and will not be repeated here.

[0088] Wherein, embodiment 2~5 only adjusted the mass volume ratio of electrode modification material and perfluorosulfonic acid-polytetrafluoroethylene copolymer solution, and the mass volume ratio corresponding to embodiment 2~5 is respectively 2mg:1mL, 2.5mg: 1mL, 3mg:1mL and 4mg:1mL. Adopt the method provided in embodiment 2~5 respectively to detect the mixed solution that lead ion concentration and cadmium ion concentration are 90 μ g / L, and compare it with the lead ion stripping current peak value and cadmium ion stripping current peak value ...

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Abstract

The invention discloses a pediatric heavy metal ion detection preparation and a detection method. The detection preparation comprises a perfluorosulfonic acid polytetrafluoroethylene copolymer solution and an electrode modification material. The electrode modification material can be prepared by preparing graphite-like phase carbon nitride with a porous structure, performing carbon doping on the graphite-like phase carbon nitride and compounding an obtained product with polyglutamic acid of which an end group is porphyrin. In the invention, the detection preparation is used for modifying an electrode, and a square wave anodic stripping voltammetry is used for detection so that simultaneous detection of lead ions and cadmium ions can be realized. Through the mode, electrochemical sensing performance of aglassy carbon electrode can be effectively improved so that sensitivity, precision and accuracy of heavy metal ion detection are improved; and the method is low in detection cost, high in detection speed, low in detection limit and good in repeatability, meets requirements of pediatrics for heavy metal ion detection, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of heavy metal detection, in particular to a detection preparation and detection method for pediatric heavy metal ions. Background technique [0002] With the rapid development of my country's industrialization process, the pollution of air, water and soil is becoming more and more serious. As pollutants, heavy metal ions not only affect the environment, but also threaten human health. In various groups of people, because children's physical development is not yet mature, and the way of exposure to the environment is different from that of adults, the same dose of heavy metal ions will have a greater impact on children. In order to protect children's health, accurate and efficient detection of heavy metal ions is very important. [0003] Among all kinds of heavy metal ions, lead ions and cadmium ions are easy to accumulate, difficult to decompose, and highly toxic. Low concentrations of lead ions can affect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 王莹莹郑程程
Owner QINGDAO WOMEN & CHILDREN HOSPITAL
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