Measuring method for cobalt content in lining paper of cigarette

A cigarette lining paper and a measurement method technology, which are applied in the preparation of test samples, measuring devices, material analysis by electromagnetic means, etc. The effect of matrix interference, good sensitivity and low detection limit

Active Publication Date: 2014-01-22
CHINA TOBACCO FUJIAN IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the determination methods of cobalt at home and abroad mainly include atomic absorption spectrometry (AAS), ultraviolet-visible spectrophotometry, inductively coupled plasma emission spectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS). ; The AAS method has a narrow linear range and can only measure one element at a time. The ICP-AES method has serious spectral interference, and the spectrophotometric method is not suitable for the simultaneous determination

Method used

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  • Measuring method for cobalt content in lining paper of cigarette
  • Measuring method for cobalt content in lining paper of cigarette
  • Measuring method for cobalt content in lining paper of cigarette

Examples

Experimental program
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Effect test

Embodiment 1

[0034] In this embodiment, the detection method of cobalt content in the inner lining paper for cigarettes is as follows (the flow chart of the detection method is as follows figure 1 shown)

[0035] 1. Sample pretreatment: The preparation method of the sample solution specifically includes weighing 0.2315g (accurate to 0.0001g) of the cigarette lining paper sample into a microwave digestion tank, adding 5mL nitric acid, 1.5mL hydrogen peroxide, and 2mL hydrogen peroxide respectively. Hydrofluoric acid, after standing for 10 minutes, slowly add 1.0mL of hydrochloric acid, after standing for 10 minutes, microwave digestion under ultra-high pressure conditions, the digestion procedure is shown in Table 1. After the digestion, take out the digestion tank, cool to room temperature, slowly open the lid, heat at 125°C to remove the acid to about 0.50mL, transfer to a 50mL plastic volumetric flask, wash the digestion tank repeatedly with ultrapure water, and wash the solution togethe...

Embodiment 2

[0057] The difference with Example 1 is:

[0058] 1. Pretreatment of samples: Weigh 0.25-0.30g (accurate to 0.0001g) of cigarette lining paper samples into a microwave digestion tank, add 6mL nitric acid, 1mL hydrogen peroxide, 2.5mL hydrofluoric acid, and let stand for 10min After that, 0.5 mL of hydrochloric acid was slowly added. After the digestion, heat the acid at 130°C to about 1.0mL.

[0059] 2. Measurement method Instrument working conditions: RF power 1200W, atomizer flow rate 0.96L / min.

[0060] 3. Others are the same as in Example 1.

[0061] 4. Measure the standard blank solution of cobalt, the cobalt standard series solution, the blank sample solution, and the inner lining paper sample solution for cigarettes according to the instrument working conditions of the "measurement method" item of the present embodiment, and obtain the working curve regression equation: Y=0.5962 +0.0233, correlation coefficient R 2 : 0.99994, convert the content of cobalt in the inn...

Embodiment 3

[0065] The difference with embodiment 1 is:

[0066] 1. The microwave digestion program is shown in Table 6:

[0067] Table 6 Microwave digestion program of inner lining paper for cigarettes

[0068]

[0069]

[0070] 5. Determination method Instrument working conditions: RF power 1300W, atomizer flow rate 0.94L / min.

[0071] 2. Others are all the same as in Example 1.

[0072] 3. Measure the standard blank solution of cobalt, the cobalt standard series solution, the blank sample solution, and the inner lining paper sample solution for cigarettes according to the instrument working conditions of the "measurement method" item of the present embodiment, and obtain the working curve regression equation: Y=0.5648 +0.1126, correlation coefficient R 2 : 0.99997, convert the content of cobalt in the inner lining paper for cigarettes by the result calculation formula, measure 12 # The content of cobalt in the lining paper for cigarettes is 0.39ug / g.

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Abstract

The invention discloses a measuring method for cobalt content in a piece of lining paper of a cigarette. The method comprises the steps of adding a nitric acid, a hydrochloric acid, a hydrofluoric acid and hydrogen peroxide to a lining paper sample of the cigarette, carrying out microwave digestion on the lining paper sample under a high pressure condition, carrying out acid driving and dilution volume metering on the lining paper sample to obtain a solution to be measured, guiding the solution to be measured into an inductively coupled plasma source mass spectrometer via a hydrofluoric acid resistant cross-shaped atomizer, and adopting a four-stage rod collision pool technology to measure the content of the cobalt in a measuring sample; selecting the variety and dosage of a digestion reagent, and optimizing the digestion pressure, eliminating basal body interference of the inductively coupled plasma source mass spectrometer by adopting a collision pool mode (a kinetic energy screening KED technology), and selecting isotopic element and internal standard element. A detection method after optimizing has the advantages that the digestion is complete, the sensitivity is high, the recovery ratio and the repeatability are good, and the basal body interference caused by a great deal of aluminum ions can be overcome; the measuring method is suitable for a condition that technologists of the lining paper production enterprise for a tobacco industry and cigarettes can carry out quantitative measurement on the cobalt in the lining paper, and the blank of the technical field is filled up.

Description

technical field [0001] The invention relates to a method for measuring cobalt content in inner lining paper for cigarettes, and belongs to the technical field of inspection of auxiliary materials for cigarettes. Background technique [0002] With the wide application of various new materials, printing inks and adhesives, the safety of cigarette packaging materials has attracted widespread attention. As the inner lining paper for direct packaging of cigarettes, base paper, raw materials, Ink, dyes and adhesives are very easy to introduce heavy metal elements; cobalt is a moderately active metal element that can enter the human body through the digestive tract and respiratory tract. In the blood plasma, inorganic cobalt is attached to albumin. For bone, spleen, pancreas, small intestine and other tissues, when there is excessive cobalt in the body, it will seriously damage the cells and tissues in the blood of the human body, cause leukopenia, and cause blood system diseases; ...

Claims

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Application Information

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IPC IPC(8): G01N27/64G01N1/44
Inventor 刘秀彩黄华发许寒春张鼎方张建平叶仲力邓其馨梁晖黄朝章陈昱刘泽春谢卫
Owner CHINA TOBACCO FUJIAN IND
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