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Detection method of propanethiol

A detection method and technology of propanethiol, which are applied in the preparation of test samples, Raman scattering, material excitation analysis, etc., can solve the problems of long detection time, troublesome operation, expensive operation instruments, etc., and achieve high sensitivity and good stability. Sexual, simple and fast effect

Active Publication Date: 2015-12-23
WEIFANG MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are expensive to operate, cumbersome to operate, and take a long time to detect

Method used

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  • Detection method of propanethiol
  • Detection method of propanethiol
  • Detection method of propanethiol

Examples

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Embodiment 1

[0032] A detection method for propanethiol, said detection method comprising the following steps:

[0033] S1. Preparation of AuNPs / Ag filaments

[0034] (1) Cleaning of silver wire: Ultrasonic clean the silver wire with acetone for 10 minutes, then with ethanol for 10 minutes, and finally with ultrapure water for 10 minutes, then immerse in 0.1M nitric acid solution for 10 seconds To remove the surface oxide layer, take it out, wash it again with ultrapure water, dry it, and set it aside;

[0035] (2) Corrosion of silver wire: use described silver wire as working electrode, Ag / AgCl electrode is done reference, titanium sheet is as counter electrode, forms three-electrode system, and the hydrochloric acid solution of 0.1M is made electrolyte, uses cyclic voltammetry Scan the silver wire 20 times at a scanning speed of 0.025V / s. The initial voltage is -0.2V, the high potential is 0.2V, and the low potential is -0.2V. Take out the corroded silver wire and wash it with ultrapure...

Embodiment 2

[0041] A detection method for propanethiol, said detection method comprising the following steps:

[0042] S1. Preparation of AuNPs / Ag filaments

[0043] (1) Cleaning of the silver wire: The silver wire was first ultrasonically cleaned with acetone for 13 minutes, then ultrasonically cleaned twice with ethanol, and the total cleaning time of the second ethanol was 13 minutes, and finally ultrasonically cleaned three times with ultrapure water, 3 washes with ultrapure water for a total of 13 minutes, then immersed in 0.1M nitric acid solution for 12 seconds to remove the surface oxide layer, take it out, wash with ultrapure water again, dry, and set aside;

[0044] (2) Corrosion of silver wire: use described silver wire as working electrode, Ag / AgCl electrode is done reference, titanium plate is as counter electrode, forms three-electrode system, and the hydrochloric acid solution of 0.1M is made electrolyte, uses cyclic voltammetry Scan the silver wire 20 times at a scanning ...

Embodiment 3

[0050] A detection method for propanethiol, said detection method comprising the following steps:

[0051] S1. Preparation of AuNPs / Ag filaments

[0052] (1) Cleaning of the silver wire: the silver wire was first ultrasonically cleaned with acetone for 16 minutes, and then ultrasonically cleaned for 2 times with ethanol. The cleaning time of the first ultrapure water washing is 16 minutes in total, and then immersed in 0.1M nitric acid solution for 14 seconds to remove the surface oxide layer, take it out, wash it with ultrapure water again, dry it, and set it aside;

[0053] (2) Corrosion of silver wire: use described silver wire as working electrode, Ag / AgCl electrode is done reference, titanium plate is as counter electrode, forms three-electrode system, and the hydrochloric acid solution of 0.1M is made electrolyte, uses cyclic voltammetry Scan the silver wire 20 times at a scanning speed of 0.025V / s. The initial voltage is -0.2V, the high potential is 0.2V, and the low p...

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Abstract

The invention belongs to the technical field of organic sulfide detection, and particularly relates to a detection method of propanethiol. The detection method comprises the following steps that S1, AuNPs-Ag wires are prepared, wherein the AuNPs-Ag wire preparation process comprises the steps of cleaning of silver wires, corrosion of the silver wires and modification of the silver wires; S2, the propanethiol is detected, wherein the propanethiol detection process comprises the steps of extraction and surface enhanced Raman detection. According to the detection method of the propanethiol, an SPME-SERS coupling technique is adopted, the technology is simple, the complex sample pretreatment process can be reduced or even omitted, the analysis time can be shortened, the detection sensitivity is high, the limit of detection to the propanethiol can reach 10-13 M, and the detection method of the propanethiol is suitable for in-situ rapid analysis of field spots.

Description

technical field [0001] The invention belongs to the technical field of organic sulfide detection, in particular to a method for detecting propanethiol. Background technique [0002] Organic sulfides usually come from large discharges of industrial wastewater (such as paper mills, slaughterhouses, biogas plants, etc.). When they are exposed to the environment in high concentrations, they not only cause harm to the environment, but also pose a threat to human health. Recent research suggests that these volatile sulfur compounds may cause nausea and headaches in humans. Due to the volatility and high reactivity of propanethiol, there are still many difficulties in their detection, such as instability that causes it to decompose when it is adsorbed to the surface of a material or when it is analyzed and detected; its concentration in the environment is too low to The sensitivity of commonly used detectors is too low, making it difficult to achieve direct sample detection and a...

Claims

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Application Information

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IPC IPC(8): G01N21/65G01N1/28
Inventor 边玮玮
Owner WEIFANG MEDICAL UNIV
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