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Method for determining lead content of cigarette paper

A technology for cigarette paper and lead content, which is applied to measurement devices, preparation of test samples, and color/spectral property measurement, etc., can solve the problems of limitation, expensive equipment, and high detection sensitivity, and achieves good accuracy, simple method, and high sensitivity. high effect

Inactive Publication Date: 2012-06-20
CHINA TOBACCO GUANGDONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the detection of trace lead, ICP-MS has high detection sensitivity, but its equipment is expensive, which is limited in the actual application of enterprises
The price of the atomic absorption spectrometer is reasonable, and most enterprises can afford it. Therefore, if the atomic absorption spectrometry can be established to detect the lead content in cigarette paper, it will have good practical application value. Report on lead content testing

Method used

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  • Method for determining lead content of cigarette paper
  • Method for determining lead content of cigarette paper
  • Method for determining lead content of cigarette paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Digestive agent experiment

[0021] 1. Materials and instruments

[0022] MF60-32S vertical ribbed cigarette paper, 65% nitric acid, 30% hydrogen peroxide and ammonium dihydrogen phosphate are excellent grade pure; hydrochloric acid, hydrofluoric acid, palladium nitrate, magnesium nitrate and ascorbic acid are analytical pure; test water is high purity water; Lead standard solution (National Iron and Steel Material Testing Center Iron and Steel Research Institute).

[0023] AA-6800 Atomic Absorption Spectrometer (Shimadzu, Japan); Ethos1 Microwave Digestion Apparatus (China Labtech Co., Ltd.); 7500A Inductively Coupled Plasma Mass Spectrometer (Agilent, USA).

[0024] 2. Sample processing

[0025] Weigh 0.3000g of cigarette paper, add different digestion agents (Table 1), press figure 1 The procedure shown for microwave digestion:

[0026] After the digestion is complete, transfer the sample to a 25mL volumetric flask to make the volume constant.

[0027] Table 1 Com...

Embodiment 2

[0046] Example 2 Cigarette paper quality test

[0047] In order to study the influence of the quality of cigarette paper on the determination of lead content, 0.2000 g, 0.3000 g, 0.4000 g, and 0.5000 g cigarette paper were weighed with an analytical balance and digested with digester 3 for microwave digestion, and then the lead content was detected by graphite furnace atomic absorption method , The results are shown in Table 3.

[0048] Table 3 Lead content measured after digestion of different quality cigarette paper

[0049]

[0050] Note: Use digester 3 for digestion, the ashing temperature is 700 ℃, the atomization temperature is 1900 ℃, and the matrix modifier is 0.10 g / L ammonium dihydrogen phosphate. The standard deviation is calculated based on the 10 test results.

[0051] It can be seen from Table 3 that when the mass of cigarette paper is 0.2000 g, the standard deviation of the detected lead content is larger, which is 0.036 mg / kg. This is because the quality of cigar...

Embodiment 3

[0052] Example 3 Ashing temperature experiment of graphite furnace atomic absorption spectrometry

[0053] When the atomization temperature is 1900℃, add 0.10g / L ammonium dihydrogen phosphate as the matrix modifier, change the ashing temperature, the change trend of absorbance is as follows image 3 Shown.

[0054] Such as image 3 As shown, when the atomization temperature is 1900℃, the absorbance is larger at a lower ashing temperature, and it has a strong matrix effect; when the ashing temperature is 700℃~800℃, the influence of the matrix effect is small; 800℃ Then the absorbance decreases with the increase of ashing temperature. The function of the ashing stage is to remove all or most of the coexisting substances in the sample as much as possible, and to ensure that there is no loss of the elements to be analyzed. Therefore, it is necessary to choose a suitable ashing temperature. When the ashing temperature is low, the coexisting substances cannot be removed. When atomized,...

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Abstract

The invention relates to the field of cigarette, specifically to a method for detecting the lead content of cigarette paper. The method comprises the steps of: weighing the cigarette paper, adding a digesting agent for microwave digestion to obtain a sample, and detecting the sample by using a graphite furnace atomic absorption spectrometer. The digesting agent employed is a nitric acid-hydrogen peroxide-high-purity water solution, wherein the volume ratio of the nitric acid, the hydrogen peroxide and the high-purity water is 4:2:2. The addition proportion of the cigarette paper and the digesting agent is 0.3g:8ml. Charring and atomization temperatures are 700-780 DEG C and 1900-2050 DEG C, respectively. The method for determining lead in the cigarette paper has the advantages of high sensitivity and good accuracy, and is simple, convenient, rapid and accurate.

Description

technical field [0001] The invention relates to the field of cigarettes, in particular to a method for detecting lead content in cigarette paper. Background technique [0002] Lead is a heavy metal element that seriously endangers human health, causing harm to the nervous system and hematopoietic system of the human body. Lead poisoning has always occupied the first place in chronic occupational poisoning cases in my country. With the deepening of people's research on smoking and health, the safety of cigarette materials has been paid more and more attention. The tobacco industry has introduced relevant lead detection standards for cigarette tipping paper, flavors and liquids. At present, reports on the detection of lead in cigarette materials mainly involve tobacco flavors and fragrances, tipping paper, etc., and corresponding industry standards have been established; however, because the lead content in cigarette paper is much lower than that in tipping paper, cigarette ...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/42
CPCG01N21/31G01N1/42G01N1/4044G01N21/3103
Inventor 方细玲张优茂
Owner CHINA TOBACCO GUANGDONG IND
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