Device and method for detecting polycyclic aromatic hydrocarbon in water sample on site

A polycyclic aromatic hydrocarbon, on-site detection technology, applied in the detection field, can solve the problems of complex process, inaccurate detection results, long time, etc., and achieve the effects of rapid analysis, improved detection sensitivity, and easy operation.

Inactive Publication Date: 2015-08-26
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a device and method for on-site detection of polycyclic aromatic hydrocarbons in water samples, said device and method for on-site detection of polycyclic aromatic hydrocarbons in water samples Solve the technical problems of inaccurate detection results, long time and complicated process of the device and method for on-site detection of polycyclic aromatic hydrocarbons in water samples in the prior art

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  • Device and method for detecting polycyclic aromatic hydrocarbon in water sample on site
  • Device and method for detecting polycyclic aromatic hydrocarbon in water sample on site
  • Device and method for detecting polycyclic aromatic hydrocarbon in water sample on site

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Embodiment 1

[0032] Such as figure 2 As shown, the device of the present invention for detecting polycyclic aromatic hydrocarbons in water samples on site consists of a sample liquid tube 1, a cleaning liquid tube 2, an eluent tube 3, a regenerating liquid tube 4, and an enhanced liquid tube 5, the sample liquid tube 1 is connected to a first peristaltic pump 6, the cleaning liquid tube 2 is connected to a second peristaltic pump 13, and the eluent tube 3 is connected to a third peristaltic pump 14. Connected, the regenerating liquid pipe 4 is connected to a fourth peristaltic pump 15, the enhanced liquid pipe 5 is connected to a fifth peristaltic pump 16, and the first peristaltic pump 6 is connected to a first three-way solenoid valve 8 is connected to one end, the second peristaltic pump 13 is connected to one end of a second three-way solenoid valve 11, the third peristaltic pump 14 is connected to one end of a third three-way solenoid valve 12, the The fourth peristaltic pump 15 is co...

Embodiment 2

[0046] figure 1 The flow chart of the method for detecting polycyclic aromatic hydrocarbons in water samples of an embodiment of the present invention is schematically given, and the method for detecting includes the following steps:

[0047] (1) Design a miniaturized flow injection analysis system,

[0048] (2) The water sample to be tested passes through the adsorption column, and the polycyclic aromatic hydrocarbons in the water sample are adsorbed; the eluent elutes the polycyclic aromatic hydrocarbons on the adsorption column, and the eluent is collected as the detection solution;

[0049] (3) Prepare silver gel with enhanced Raman spectrum activity, add it to the enhanced liquid tube, and introduce it into the detection liquid through the peristaltic pump tube to fully mix it with polycyclic aromatic hydrocarbons;

[0050] (4) The portable Raman spectrometer 18 is used for detection, and the Raman spectrum and the fingerprint spectrum are compared to perform qualitative and semi...

Embodiment 3

[0052] The application example of the detection method according to Embodiment 2 of the present invention in the detection of environmental water samples, specifically the semi-quantitative detection of four polycyclic aromatic hydrocarbons, fluoranthene, 3,4-benzopyrene, pyrene and anthracene in drinking water samples, The specific method includes the following steps:

[0053] (1) Preparation of silver glue substrate for surface enhanced Raman spectroscopy

[0054] In a 100 mL glass beaker, add 50 mL of 1 mM silver nitrate (AgNO 3 ), and then gradually add dropwise 2 mL of 4 g / L humic acid (HAs), and then heat the solution to 90°C under constant stirring. After half an hour, the mixed liquid changed from the initial brown to brownish gray, and the mixed liquid continued to turn gray as the reaction time increased. After reacting for about 3 h, the reaction solution was removed from the heating platform, and stirring was continued until the mixture was cooled to room temperature. ...

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Abstract

A device for detecting polycyclic aromatic hydrocarbon in a water sample on site comprises a sample liquid tube, a cleaning liquid tube, an eluent tube, a regeneration liquid tube and an enhancement liquid tube, wherein each of the sample liquid tube, the cleaning liquid tube, the eluent tube, the regeneration liquid tube and the enhancement liquid tube is connected with a peristaltic pump, a first peristaltic pump is connected with a first three-way solenoid valve, a second peristaltic pump is connected with a second three-way solenoid valve, a third peristaltic pump is connected with a third three-way solenoid valve, a fourth peristaltic pump is connected with the third three-way solenoid valve, the third three-way solenoid valve and the second three-way solenoid valve are connected, the second three-way solenoid valve is connected with the first three-way solenoid valve, the first three-way solenoid valve is connected with an adsorption column, the adsorption column is connected with a detection cell, a fifth peristaltic pump is connected with the detection cell, and the detection cell is connected with a Raman spectrometer. The invention further provides a method for detecting the polycyclic aromatic hydrocarbon in the water sample. With the adoption of the device and the method, analysis is rapid, the sensitivity is high, a few samples are used, the application range is wide, operation is simple and convenient, repeated usage can be realized, and carrying is convenient.

Description

Technical field: [0001] The invention belongs to the field of detection, and in particular relates to a device and method for detecting polycyclic aromatic hydrocarbons, in particular to a device and method for on-site detection of polycyclic aromatic hydrocarbons in water samples. Background technique: [0002] Polycyclic aromatic hydrocarbons are a class of hydrocarbons containing two or more benzene rings. Most aromatic compounds have serious harm to human health and the ecological environment. my country's current drinking water quality standard (GB5749-2006) stipulates that the maximum allowable concentration of polycyclic aromatic hydrocarbons is 2.0 μg / L. At present, the technologies commonly used for on-site detection of polycyclic aromatic hydrocarbons are mainly portable gas chromatography or portable GC-MS and some portable ultraviolet-fluorescence spectrophotometers. The former is mainly used for rapid detection of volatile organic pollutants, but the detection ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 李丹
Owner SHANGHAI INST OF TECH
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