Method for detecting nitrite in pickled meat by electrochemical sensor based on mesoporous carbon with cubic Ia3d structure
A nitrite, mesoporous carbon technology, applied in the direction of material electrochemical variables, scientific instruments, instruments, etc., can solve the problems of inability to meet daily monitoring, cumbersome operation process, long analysis time, etc., to promote direct electron transfer, enhance Catalysis, the effect of enhancing electrochemical signal
Active Publication Date: 2021-07-20
JIANGSU UNIV
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Problems solved by technology
[0004]
The present invention aims at existing detection problems, such as cumbersome operation process of some methods, long analysis time, susceptible to interference, unable to meet the needs of daily monitoring, etc.
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Embodiment 1
[0043] (1) if figure 1 As shown, the ordered mesoporous carbon material CMK-8 with a bicontinuous cubic Ia3d structure was prepared by using the mesoporous silica KIT-6 as a template and sucrose as a carbon source by using the hard template method. The specific process is as follows: 1 g KIT- 6 powder was added to 5 mL of an aqueous solution containing 1.5 g of sucrose, and 0.09 mL of H 2 SO 4 And stirring was continued for 10 minutes. The above mixture was heated at 100°C for 6 hours, then the temperature was raised to 160°C for 6 hours. Next, 5 mL of aqueous solution in which 1 g of sucrose was dissolved and 0.05 mL of H 2 SO 4 , and stirred for 10 minutes, repeating the above heating operation: heating at 100°C for 6 hours, and then raising the temperature to 160°C for 6 hours; after that, the obtained carbon-silicon composite was heated in a tube furnace at 900°C under a nitrogen atmosphere maintained in the medium for 6 hours, the carbonized product was etched with 1...
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Abstract
The invention belongs to the technical field of meat product quality detection, and relates to a method for detecting nitrite in pickled meat by an electrochemical sensor based on mesoporous carbon with a cubic Ia3d structure. The method comprises the following steps: firstly, synthesizing ordered mesoporous carbon CMK-8 with an Ia3d structure by adopting a hard template method, tightly combining positively charged gold nanoparticles AuNPs inside and outside ordered pore channels of the negatively charged CMK-8 through an electrostatic adsorption effect to obtain a composite material, dropwise adding the composite material on the surface of a treated glassy carbon electrode, and performing infrared drying to obtain a working electrode; dropwise adding a hemoglobin solution on the surface of the working electrode, and obtaining the electrochemical sensor after drying, cleaning and re-drying, wherein the electrochemical sensor can be applied to detection of nitrite in the salted meat. According to the method, the sensitivity, the stability and the selectivity in the NO2<-> detection process are effectively improved, the method can be repeatedly used, the operation steps are simple and rapid, and large-scale detection of the nitrite content in food can be realized.
Description
technical field [0001] The invention belongs to the technical field of meat product quality detection, and in particular relates to a method for detecting nitrite in cured meat with an electrochemical sensor based on cubic Ia3d structured mesoporous carbon. Background technique [0002] Cured meat products are widely loved by consumers because of their rich nutrition, attractive aroma and unique taste. In its production process, nitrite is usually added as a color-protecting agent for meat products to improve the sensory color of meat products, giving it a bright and bright red color with a special flavor; Oxygenous Clostridium, such as Clostridium botulinum and Lactobacillus viridans, have inhibitory effects and can prolong the shelf life of meat products. However, excessive intake of nitrite can seriously affect human health. As a strong oxidant, nitrite can convert ferrous hemoglobin into methemoglobin after entering the human blood, making it lose its oxygen-carrying f...
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Login to View More IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 孙宗保刘小裕张新爱邹小波牛增潘浩东李君奎高云龙
Owner JIANGSU UNIV