Electrochemical sensor for rapid detection of trace amount of butyl p-hydroxybenzoate and preparation method thereof

A butyl hydroxybenzoate, electrochemical technology, applied in the direction of electrochemical variables of materials, etc., can solve problems such as complex detection steps, and achieve the effects of simple operation, easy portability, and easy preparation.

Inactive Publication Date: 2018-03-23
XINYANG NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the defects in the prior art that the detection of the preservative butyl p-hydroxybenzoate can only be completed with the help of expensive instruments, and the detection steps are complicated, the present invention provides a method based on hollow CeO 2 Electrochemical sensor for rapid detection of preservative butyl p-hydroxybenzoate in trace amounts of microspheres and its preparation method

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  • Electrochemical sensor for rapid detection of trace amount of butyl p-hydroxybenzoate and preparation method thereof
  • Electrochemical sensor for rapid detection of trace amount of butyl p-hydroxybenzoate and preparation method thereof
  • Electrochemical sensor for rapid detection of trace amount of butyl p-hydroxybenzoate and preparation method thereof

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preparation example Construction

[0037] The preparation method of the electrochemical sensor of described trace rapid detection preservative butyl p-hydroxybenzoate comprises the following steps:

[0038] Step 1, the synthesis of Ce-Cit coordination polymer hollow microspheres:

[0039] 6 mmol of citric acid was added to 24 mL of secondary water, 2 mmol of Ce(NO 3 ) 3 ·6H 2 O was added to the above citric acid solution under stirring conditions, and after stirring for a few minutes, the solution was transferred to a 30 mL reactor, sealed, and reacted at 160 °C for 12 h, and the pH value was adjusted with 1mol / L HCl, and the reaction was adjusted if necessary Amount of substance, the product that obtains washes several times respectively with water and ethanol, 60 DEG C of drying;

[0040] Step 2. Hollow CeO 2 Synthesis of microspheres: the Ce-Cit coordination polymer hollow microspheres synthesized in step 1 were calcined at 365 °C for 1.5 h to obtain the target object;

[0041] Step 3. Hollow CeO 2 Dispe...

Embodiment 1

[0057] An electrochemical sensor for quickly detecting the preservative butyl p-hydroxybenzoate in a trace amount, including a working electrode, a reference electrode, and a counter electrode; it is characterized in that: the working electrode is a hollow CeO with high electroactivity drop-coated on the surface 2 Glassy carbon electrodes with microsphere-modified membranes, such as figure 1 As shown, 1 is glassy carbon substrate 2 surface drop-coated with hollow CeO 2 The modified film of microspheres, 2 is a glassy carbon substrate, 3 is an insulating layer, and 4 is an electrode lead connected to the glassy carbon substrate 2;

[0058] The preparation method of the electrochemical sensor of described trace rapid detection preservative butyl p-hydroxybenzoate comprises the following steps:

[0059] Step 1: Synthesis of Ce-Cit coordination polymer hollow microspheres:

[0060] 6 mmol of citric acid was added to 24 mL of secondary water, 2 mmol of Ce(NO 3 ) 3 ·6H 2 O was ...

Embodiment 2

[0078] An electrochemical sensor for quickly detecting the preservative butyl p-hydroxybenzoate in trace amounts, including a working electrode, a reference electrode, and a counter electrode; it is characterized in that: the working electrode is a hollow CeO with high electroactivity drop-coated on the surface 2 Glassy carbon electrodes with microsphere-modified membranes, such as figure 1 As shown, 1 is glassy carbon substrate 2 surface drop-coated with hollow CeO 2 The modified film of microspheres, 2 is a glassy carbon substrate, 3 is an insulating layer, and 4 is an electrode lead connected to the glassy carbon substrate 2;

[0079] The preparation method of the electrochemical sensor of described trace rapid detection preservative butyl p-hydroxybenzoate comprises the following steps:

[0080] Step 1: Synthesis of Ce-Cit coordination polymer hollow microspheres:

[0081] 6 mmol of citric acid was added to 24 mL of secondary water, 2 mmol of Ce(NO 3 ) 3 ·6H2 O was add...

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Abstract

The invention relates to the fields of electrochemical sensors and electroanalytical chemistry, and specifically discloses an electrochemical sensor for quickly detecting trace amounts of the preservative butyl p-hydroxybenzoate and a preparation method thereof. The electrochemical sensor is sensitive to the preservative butyl p-hydroxybenzoate The determination of ester has high sensitivity, good selectivity, simple operation, low cost and reliable results. The electrochemical sensor of the present invention includes a working electrode, a reference electrode and a counter electrode; the working electrode is a glassy carbon electrode whose surface is drop-coated with a modified film of hollow CeO2 microspheres with high electrical activity. The electrochemical sensor prepared by the invention has been successfully applied to the detection of butyl p-hydroxybenzoate in dried spiced tofu, various cellulose composite capsules, jams and cosmetics.

Description

technical field [0001] The invention relates to the fields of electrochemical sensors and electroanalytical chemistry, in particular to an electrochemical sensor for rapidly detecting trace amounts of butyl p-hydroxybenzoate in cosmetics, food and medicine and a preparation method thereof. Background technique [0002] Butyl p-hydroxybenzoate, also known as paraben, is a series of preservatives with the widest application, the largest amount, and the highest frequency of application in the world. Based on its high efficiency, non-volatility, wide range of pH applications, and good bactericidal ability , easy compatibility and good chemical stability are widely used in daily chemicals, cosmetics, medicine, food, feed and various industrial anti-corrosion aspects. In recent years, with the development of society and economy, the amount of paraben preservatives has gradually increased, and the amount of residues in the environment has increased day by day. Due to the relativel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48G01N27/30
Inventor 甘甜孙俊永吕珍史朝霞赵爱霞孙云云
Owner XINYANG NORMAL UNIVERSITY
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