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Method for simultaneously detecting content of four heavy metal elements in tobacco leaves

A technology of element content and heavy metal, which is applied in the content of four heavy metal elements of mercury, cadmium, and simultaneously detects arsenic and lead in tobacco leaves and its products, can solve problems such as no successful reports, and solve the problem of decomposition and residual organic matter interference Problems, short digestion time, and low detection limit

Inactive Publication Date: 2012-07-25
YUNNAN AGRICULTURAL UNIVERSITY +2
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Problems solved by technology

But application of this method to detect the content of heavy metals in tobacco and its products has not yet seen any successful reports in the prior art

Method used

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  • Method for simultaneously detecting content of four heavy metal elements in tobacco leaves
  • Method for simultaneously detecting content of four heavy metal elements in tobacco leaves
  • Method for simultaneously detecting content of four heavy metal elements in tobacco leaves

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experiment example

[0017] 1. This method was used to determine As, Pb, Cd, and Hg in 71 tobacco leaf samples of the same variety and the same part in Yunnan, with 6 parallel determinations.

[0018] 1.1 Instruments and reagents

[0019] Instrument part: microwave digestion extractor: Multiwave 3000 (Austria Anton paar company, equipped with F100-TMF high-pressure digestion and extraction reaction inner tube); Optimass 9500 inductively coupled plasma rectangular acceleration time-of-flight mass spectrometer (ICP-oaTOF-MS Australia GBC scientific Equipment Pty Ltd); electronic balance: BP221S type (sensitivity of sarlorius company: 0.0001g); constant temperature and humidity oven for tobacco: PC000 type (UK Astell Scientific company); ultrapure water meter: water conductivity ≥ 18.2MΩ cm (MiLi -Q company); the utensils used were soaked with 10% nitric acid for 48h.

[0020] Reagent part: 65% concentrated nitric acid, 30% hydrogen peroxide (mass fraction, superior grade, Germany MerckKgaA company)...

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Abstract

The invention discloses a method for simultaneously detecting the content of four heavy metal elements in tobacco leaves. The method comprises the steps of standard solution preparation, sample pretreatment and sample analysis. According to the invention, a tobacco leaf sample is subjected to pretreatment by adopting a closed microwave digestion technology, so that the method disclosed by the invention has the advantages of short digestion time, accuracy and completeness in digestion and capability of effectively avoiding result deviation and environmental pollution caused by heating and volatilization compared with the conventional digestion methods such as a dry ashing method and an acid digestion method; As, Cd, Hg and Pb can be detected simultaneously, so that the problems on the decomposition of the sample and the interference of residual organic matters are effectively solved, and element detection limit is obviously reduced compared with that of other methods; the method disclosed by the invention has the characteristics of high accuracy and density, low detection limit, short analyzing time, simultaneous detection of a plurality of elements and the like, and can be used for detecting a plurality of samples to be analyzed; and moreover, sample detection quality and efficiency is increased to a larger extent.

Description

technical field [0001] The invention belongs to the technical field of tobacco component detection, and in particular relates to a method capable of simultaneously detecting the contents of four heavy metal elements, arsenic, lead, cadmium and mercury in tobacco leaves and products thereof. Background technique [0002] On October 8, 2010, a scientific report released by the International Tobacco Control Policy Evaluation Project (ITC) showed that 13 Chinese domestic cigarette brands were detected to contain heavy metals, and their content was more than three times higher than that of Canadian cigarettes. Tobacco contains heavy metals. During the smoking process, these heavy metals can enter the human body through mainstream smoke, causing potential harm to the human body. Among the 107 harmful components of cigarette smoke reported in the United States in 1989, As, Cd, Cr, Pb, Ni, Cu, Se, etc. , Hg included in the 44 harmful components of tobacco. More and more studies ha...

Claims

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Application Information

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IPC IPC(8): G01N1/44G01N27/64
Inventor 易建华丁元明杨焕文旦有明曹红牛芸吕平刘永嘉吴涛王戈赵正雄李佛琳
Owner YUNNAN AGRICULTURAL UNIVERSITY
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