A kind of on-site rapid detection method of trichlorfon and simazine in seawater

A detection method and technology for trichlorfon, applied in measurement devices, material excitation analysis, instruments, etc., can solve the problems of selective time-consuming, expensive labor, time-consuming, etc., to eliminate the interference of other substances, improve detection sensitivity, Wide range of effects

Active Publication Date: 2021-07-20
SHANGHAI INST OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However many of these methods are time-consuming, expensive and labor-intensive
Furthermore, they often require complex sample pretreatment procedures and thus are not easily applicable for high-throughput screening of analytes in complex samples
In recent years, Chinese patent (publication number CN 102507820A) detects trichlorfon in trace amounts by molecular imprinted solid phase extraction and gas chromatography; Chinese patent (publication number CN107655990A) detects simazine residues in farmland environment by gas chromatography Although the above two methods are accurate and highly sensitive, they still have the disadvantages of selectivity, time-consuming and expensive.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of on-site rapid detection method of trichlorfon and simazine in seawater
  • A kind of on-site rapid detection method of trichlorfon and simazine in seawater
  • A kind of on-site rapid detection method of trichlorfon and simazine in seawater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Detection of trichlorfon and simazine by surface-enhanced Raman technology

[0027] (1) Preparation of gold nanorods by seed crystal method

[0028] a. Preparation of gold nano seed solution: 10mL 0.1M cetyl ammonium bromide (CTAB) aqueous solution and 0.25mL 0.01M tetrachloroauric acid aqueous solution were mixed evenly at a temperature of 25-28°C, then quickly added 0.6mL 0.01M Sodium borohydride solution (preserved in an ice-water bath), stirred for 3 minutes, and left to stand at room temperature at 25-28°C for 2 hours before use. At this time, the gold concentration was 0.25 mmol / L.

[0029] b. Preparation of gold nanorods: Mix 10mL 0.1M cetyltrimethylammonium bromide aqueous solution with 0.01M tetrachloroauric acid aqueous solution at a temperature of 25-28°C, and then add 0.1mL 0.01M silver nitrate and 0.2mL 1M hydrochloric acid, stir well, add 0.08mL 0.1M ascorbic acid as reducing agent, the solution turns from dark yellow to colorless, add 12μL pr...

Embodiment 2

[0040] Embodiment 2: detect trichlorfon and simazine in seawater

[0041] Figure 8 A flow chart of trichlorfon and simazine in seawater according to an embodiment of the present invention is schematically provided, and the detection method includes the following steps:

[0042] (1) Gold nanorods are prepared by the seed crystal method, and the steps are the same as in Example 1;

[0043] (2) Prepare the gold nanorod material (Au NRs / L-Cys) modified by L-cysteine, the steps are the same as in Example 1;

[0044] (3) Synthesize gold nanospheres by the hydrothermal method, the steps are the same as in Example 1;

[0045] (4) Prepare the gold nanosphere composite (ATP / Au NPs) modified by p-mercaptoaniline, the steps are the same as in the examples; 1

[0046] (5) Prepare gold nanorod and gold nanosphere composite material (Au NRs / L-Cys@ATP / Au NPs), the steps are the same as in Example 1;

[0047] (6) SERS detection of trichlorfon and simazine in seawater.

[0048] Three kind...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
aspect ratioaaaaaaaaaa
Login to view more

Abstract

The invention discloses a field rapid detection method for trichlorfon and simazine in seawater. It includes the following steps: (1) synthesizing gold nanorods by seed crystal method; (2) adding L-cysteine ​​to the gold nanorod solution to obtain L-cysteine-modified gold nanorod materials; (3) Synthesis of gold nanospheres by hydrothermal method; (4) adding p-mercaptoaniline to gold nanospheres to obtain gold nanosphere composites modified by p-mercaptoaniline; (5) gold nanorod materials modified by L-cysteine Mix with the gold nanosphere composite material modified by p-mercaptoaniline, and obtain the gold nanorod and gold nanosphere composite material through the action of peptide bond, as the SERS active substrate; (6) use the Raman spectrometer to detect trichlorfon and simazine, thereby Qualitative and quantitative analysis and detection of trichlorfon and simazine in seawater. The invention has the characteristics of rapid analysis, high sensitivity, less sample consumption, wide application range, simple operation, convenient portability and the like.

Description

technical field [0001] The invention belongs to the technical field of rapid detection of organic pollutants in the marine environment, and in particular relates to an on-site rapid detection method for trichlorfon and simazine in seawater. Background technique [0002] Pesticides such as trichlorfon and Simazine are widely used as protective fungicides in the field of agriculture to promote the growth of plants. However, due to its high toxicity, biological and environmental persistence, pesticides cause adverse health effects in coastal environments such as seawater, sediments and marine products. According to the regulations of the US Environmental Protection Agency and the European Union, the maximum allowable concentrations of individual pesticides and total pesticides in drinking water are 0.1 μg / L and 0.5 μg / L, respectively. Therefore, it is urgent to establish an on-site rapid detection method for trichlorfon and simazine in seawater. [0003] Traditional detection...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 李丹段化珍马亚丹杜乐邓维
Owner SHANGHAI INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap