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Water body polycyclic aromatic hydrocarbon detection reagent and application thereof

A technology for polycyclic aromatic hydrocarbons and detection reagents, which is applied in the field of detection reagents for polycyclic aromatic hydrocarbons in water, can solve problems such as increased hydrophobicity, difficulty in stably dispersing aqueous solutions, and limited applications, and achieves ultra-sensitive detection, improved enrichment capacity, and high sensitivity. Effect

Active Publication Date: 2013-08-21
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the lack of polar functional groups in the polycyclic aromatic hydrocarbon molecules, it is necessary to modify the surface of the graphene / nano noble metal composite, and enrich the polycyclic aromatic hydrocarbon molecules with the help of the surface modification layer to obtain a better SERS signal. The increased hydrophobicity of graphene / nano-noble metal composites makes it difficult to stably disperse in aqueous solution, these factors limit the application of graphene / nano-noble metal composites in the detection of polycyclic aromatic hydrocarbons in water

Method used

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  • Water body polycyclic aromatic hydrocarbon detection reagent and application thereof
  • Water body polycyclic aromatic hydrocarbon detection reagent and application thereof
  • Water body polycyclic aromatic hydrocarbon detection reagent and application thereof

Examples

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Effect test

Embodiment 1

[0038] (1) Measure 20ml10 -2 M AgNO 3 solution, 59ml of deionized water, 1ml of graphene oxide solution, mixed and ultrasonicated for 15min at room temperature, and transferred to a three-necked flask;

[0039] (2) heating the above solution to 90°C while stirring, adding 20ml of 1% trisodium citrate solution rapidly, and continuing the reaction for 24h;

[0040] (3) washing and separating after the above-mentioned reactants are naturally cooled to room temperature to obtain graphene / nano-Ag composites with excellent surface-enhanced Raman effect;

[0041] (4) redispersing the graphene / nano-Ag composite obtained in step (3) in water, the concentration is 0.01M (in terms of silver content), to obtain reagent A;

[0042] (5) Mix the aqueous solution of pyrene with reagent B (CTAB) with a concentration of 2 mg / ml, wherein the concentration of pyrene after mixing is 10 -4 M, the concentration of CTAB was 0.2 mg / ml, and then 100 μL of reagent A was added to mix and sonicate for ...

Embodiment 2

[0044] (1) Measure 20ml10 -2 M AgNO 3 solution, 59ml of deionized water, 0.5ml of graphene oxide solution, mixed and sonicated for 15min at room temperature, and transferred to a three-necked flask;

[0045] Steps (2)-(4) are identical with embodiment (1);

[0046] (5) Mix the aqueous solution of perylene with reagent B (TTAC) with a concentration of 2 mg / ml, wherein the concentration of perylene after mixing is 10 -6 M, the concentration of TTAC was 0.4 mg / ml, and then 100 μL of reagent A was added to mix and sonicate for 30 minutes. When preparing the test sample, draw 10 μL of the above solution and drop it on the cleaned glass slide for Raman detection (excitation wavelength is 532 nm), such as image 3 As shown, distinct peaks characteristic of perylene can be observed.

Embodiment 3

[0048] (1) Measure 20ml10 -2 M HAuCl 4 solution, 59ml of deionized water, 1ml of graphene oxide solution, mixed and ultrasonicated for 15min at room temperature, and transferred to a three-necked flask;

[0049] (2) The above solution was heated to 100°C while stirring, and 20ml of 1% glucose solution was added rapidly, and the reaction was continued for 24h;

[0050] Step (3)-(5) is identical with embodiment (1), as Figure 4 As shown, distinct peaks characteristic of pyrene can be observed.

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Abstract

The invention discloses a water body polycyclic aromatic hydrocarbon detection reagent. The detection reagent consists of a reagent A and a reagent B, wherein the reagent A is an aqueous solution of a graphene / nano precious metal compound, and the reagent B is a surfactant solution. The invention also discloses an application of the water body polycyclic aromatic hydrocarbon detection reagent. The application comprises the steps of: firstly dispersing the reagent B in a polycyclic aromatic hydrocarbon solution; then adding the reagent A into the mixed solution and evenly mixing; and finally performing Raman detection on a suitable amount of the mixed solution to obtain a polycyclic aromatic hydrocarbon SERS (Surface Enhanced Raman Scattering) spectrum. The invention provides the water body polycyclic aromatic hydrocarbon detection reagent and the application thereof which can be used for rapidly detecting polycyclic aromatic hydrocarbons in a water body, are convenient to detect and good in data repeatability, and can realize the single-component or multi-component detection of the polycyclic aromatic hydrocarbons.

Description

technical field [0001] The invention relates to the technical field of organic pollutant detection, in particular to a water polycyclic aromatic hydrocarbon detection reagent and application thereof. Background technique [0002] Polycyclic aromatic hydrocarbons are a class of organic compounds composed of two or more aromatic rings, which have strong carcinogenic, teratogenic and mutagenic biological toxicity. Although the absolute content of polycyclic aromatic hydrocarbons in water is very low, the harm of polycyclic aromatic hydrocarbons has the characteristics of concealment and suddenness. Once a major pollution incident occurs, it will have catastrophic consequences and even continue to harm generations. Therefore, countries around the world have successively formulated environmental regulations and standards related to PAHs and included them in environmental monitoring projects. Traditional analysis and detection methods for PAHs mainly include liquid chromatography...

Claims

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Application Information

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IPC IPC(8): G01N1/28
Inventor 钱志江程昱川何茹靳婷许高杰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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