Pb<2+> concentration detection sensor and device, preparation method and use method

A concentration detection and sensor technology, applied in the field of pb2+ concentration detection, can solve the problems of low detection selectivity and high price, and achieve the effect of high detection selectivity and low cost

Pending Publication Date: 2021-01-22
SHENZHEN TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of Pb 2+ Concentration detection sensor, devic

Method used

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  • Pb&lt;2+&gt; concentration detection sensor and device, preparation method and use method
  • Pb&lt;2+&gt; concentration detection sensor and device, preparation method and use method
  • Pb&lt;2+&gt; concentration detection sensor and device, preparation method and use method

Examples

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Embodiment 1

[0088] Dilute the 36% acetic acid solution with deionized water to 4% by mass. Dissolve 100mg chitosan in 10ml 4% acetic acid solution. Stir continuously at 100° C. for 2 hours with a magnetic stirrer to obtain a 1 wt % chitosan solution. Dilute the 35% polyacrylic acid to 10% with deionized water.

[0089] A section of photonic crystal fiber 102 with a length of 2 cm is fused between two standard single-mode fibers 101 as a sensing element. The sensor was then soaked in piranha solution (70% sulfuric acid and 30% hydrogen peroxide) for 60 minutes to remove organic impurities on its surface, then rinsed with deionized water several times, and finally dried in an oven.

[0090] Place the sensing element in the chitosan solution for 5 minutes, dry it in the air for 1 minute, then soak it in deionized water for 1 minute to wash off the chitosan with weak surface binding ability, and then place it in the polyacrylic acid solution for reaction 5 minutes, and 1 minute in dry air,...

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Abstract

The invention discloses a pb<2+> concentration detection sensor and device, a preparation method and a use method. The pb<2+> concentration detection sensor comprises a photonic crystal fiber, single-mode fibers connected with the two ends of the photonic crystal fiber and a sensitive film coating the surface of the photonic crystal fiber, and the sensitive film has a function of causing refractive index change after being combined with pb<2+>. According to the pb<2+> concentration detection sensor, the sensitive film can be combined with Pb<2+> in a solution to cause the change of the refractive index, so that the concentration of Pb<2+> in water can be effectively detected according to the change of the refractive index. The pb<2+> concentration detection sensor has the advantages of high detection selectivity and low cost.

Description

technical field [0001] The present invention relates to pb 2+ Concentration detection technical field, especially relate to a kind of pb 2+ Concentration detection sensor, device, preparation method and use method. Background technique [0002] The most common heavy metals in the aquatic environment are mercury (Hg), lead (Pb), cadmium (Cd), chromium (Cr), and arsenic (As), which also have high biological toxicity at low concentrations. Among them, Pb 2+ It has attracted widespread attention due to its chronic toxicity. Pb in water 2+ It mainly comes from two aspects: on the one hand, it comes from industrial and mining smelting, manufacturing and use, especially the high-concentration lead-containing wastewater discharged from non-ferrous metal smelting; on the other hand, it comes from the lead-containing gas emitted by automobiles. Pb 2+ Accumulation in the human body can cause serious damage to internal organs such as the brain and kidneys. The most serious of the...

Claims

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Application Information

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IPC IPC(8): G01N21/41G01N21/45G01N33/18
CPCG01N21/4133G01N21/45G01N33/1813G01N2021/458
Inventor 张倩倩林煜瑛王方军陈志超
Owner SHENZHEN TECH UNIV
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