Method for collecting free-state Pb (II) ions in environment quantitatively in situ

Abstract

The invention discloses a method for collecting free-state Pb (II) ions in an environment quantitatively in situ and relates to an environmental monitoring method of metal ions. The method comprises the steps as follows: (1) a diffusion membrane capable of permeating a monitored matter is provided; and (2) a Pb (II) ion imprinted material having the ability of specific binding to the free-state Pb (II) ions is contained on the inner side of the membrane. Within a certain period of time, the diffusion effect of the free-state Pb (II) ions of a to-be-tested system in the diffusion membrane is used for enabling the free-state Pb (II) ions to enter the inner side of the diffusion membrane; and the free-state Pb (II) ions entering the inner side of the diffusion membrane are immediately bound to the Pb (II) ion imprinted material, so that a constant diffusion gradient is formed inside and outside the diffusion membrane, the quantity accumulated by the Pb (II) ion imprinted material on the inner side of the diffusion membrane has a linear relation with the concentration and the collection time of the free-state Pb (II) ions of the to-be-tested system, and the purpose of in-situ and quantitative collection of the free-state Pb (II) ions in the environment system is achieved.

Description

technical field

[0001] The present invention relates to a kind of environmental monitoring method of metal ion, particularly relate to a kind of free state Pb ( ) ionic method. Background technique

[0002] Lead is a heavy metal element that seriously endangers human health. It can affect various organs such as nerves, hematopoiesis, digestion, urinary, cardiovascular, reproduction, and bones. The main target organs are the nervous system and hematopoietic system. It affects the growth and intellectual development of infants and young children, damages brain functions such as cognitive function, neurobehavior, learning and memory, and causes dementia in severe cases. For children, the academic community has confirmed that as long as the blood lead level exceeds 0.1mg / L, no matter whether there are clinical symptoms or signs, it can be diagnosed as lead poisoning in children. Lead poisoning can lead to mental decline and learning disabilities.

[0003] Lead in the huma...

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