Gas-phase nicotine electrochemical determination method based on passive sampling method

Abstract

The invention provides a gas-phase nicotine electrochemical determination method based on a passive sampling method, which comprises the following steps: selecting a silk-screen printing gold electrode, adopting a sulfuric acid solution to electrochemically preprocessing an electrode, selecting a handheld portable electrochemical workstation to construct a portable nicotine electrochemical sensor, and connecting a gas-phase passive sampler and an electrochemical detection device for use; placing the device in a closed box, exposing the device in flue gas environments with different concentrations, and performing detecting in a voltage range of 0.5-0.9 V by adopting a square wave voltammetry to obtain a characteristic response current value of nicotine; detecting the actual tobacco sample according to the method, obtaining the nicotine response current value, substituting the response current value into the standard curve and the corresponding linear regression equation, and obtaining the concentration of nicotine in the sample. The method is easy and convenient to operate and low in detection cost, tedious sample pretreatment and separation are not needed, and direct detection of nicotine is achieved. The abstract drawing is a schematic diagram for detecting nicotine.

Description

technical field [0001] The invention relates to the technical field of electrochemical analysis and detection, in particular to an electrochemical method for measuring the concentration of nicotine in smoke. Background technique [0002] Tobacco is a special economic crop with a long history, which is widely planted in countries such as the United States, China, India, Brazil and Cuba. The total output, total area and cigarette production of tobacco planting in my country rank first in the world at present, and it has become an important source of consumption and taxation in my country. Smoking is harmful to health is a major issue of common concern around the world, reducing the harm caused by smoking to the greatest extent, and retaining the unique aroma and taste of tobacco are the two development directions of the tobacco industry. [0003] Nicotine (Nicotine, also known as nicotine (1-methyl-2 (3-pyridyl) pyrrolidine), referred to as NCT, the content in tobacco is abou...

AI Technical Summary

Problems solved by technology

After the "Framework Convention on Tobacco Control" came into force in my country in January 2006, a lot of tobacco control work has been carried out one after another. Although the exposure to second-hand smoke has improved, all indoor workplaces and indoor public places stipulated in the "Convention" should be within reach. The smoke still has a long distance, and the lack of sampling and detection methods for tobacco smoke in the ambient air is an important reason

[0013] However, the cost of this type of modified electrode method is high, and it is difficult for ordinary laboratories to prepare or purchase such electrodes. Therefore, it is necessary to develop an electrochemical method for measuring the concentration of nicotine in tobacco leaves with low price, strong operability and accurate results.

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