Method for measuring cadmium content in smoke tipping paper

A technology for cigarette tipping paper and measurement methods, which is applied in the preparation of test samples, color/spectral characteristic measurement, etc., and can solve the problem of not truly reflecting the cadmium content, acid removal conditions, and measurement conditions in cigarette tipping paper samples Inapplicable, unsatisfactory parallel results and other problems, to achieve the effect of low blank value, fast and simple acid removal process, and less reagents

Active Publication Date: 2008-10-29
ZHENGZHOU TOBACCO RES INST OF CNTC
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Problems solved by technology

[0007] From the above results, the cadmium results tested by the national recommended standard for the same sample have large deviations, and the parallel results are not ideal
The reasons: First, the composition of the cigarette tipping paper sample is relatively complex, containing a large amount of silicon magnesium oxide, iron oxide, titanium oxide, etc., which are difficult to digest. Therefore, when testing according to the recommended standards, the cigarette tipping paper The sample could not be completely digested, the solution was turbid and had a large amount of precipitates, and it was color

Method used

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  • Method for measuring cadmium content in smoke tipping paper
  • Method for measuring cadmium content in smoke tipping paper
  • Method for measuring cadmium content in smoke tipping paper

Examples

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example 1

[0063] 1. Instruments and reagents: plastic volumetric flask, 50mL. Analytical balance, the sensitivity is 0.0001g. Teflon beaker, 100mL. Airtight microwave digestion instrument (with microwave digestion tank). Temperature controlled electric heater. Graphite Furnace Atomic Absorption Spectrometer. Water, ultrapure water or double distilled water of equivalent purity. Nitric acid, 65%. Nitric acid, 1%. Hydrogen peroxide, 30%. Hydrochloric acid, 37%. Hydrofluoric acid, 40%. Ammonium dihydrogen phosphate solution, 10g / L. Magnesium nitrate solution, 1g / L. Cadmium standard stock solution, concentration 10.0mg / L.

[0064] 2. Sample treatment: Precisely weigh 0.2g tipping paper sample A, place it in a microwave digestion tank, add a certain volume of 65% nitric acid, 40% hydrofluoric acid, 37% hydrochloric acid and 30% After sealing the hydrogen peroxide, put it into a microwave digestion apparatus, and carry out microwave digestion according to the digestion program sho...

example 2

[0067] As described in Example 1, a tipping paper sample of brand B was selected, and the cadmium in the sample was measured to be 0.21 mg / kg.

example 3

[0069] As described in Example 1, a tipping paper sample of brand C was selected, and the cadmium in the sample was measured to be 0.08 mg / kg.

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Abstract

A method for detecting cadmium content in cigarette used tipping paper is characterized in that the method can quickly and accurately detect the cadmium content in the cigarette used tipping paper by the following steps: adopting mixed acid to carry out microwave digestion for a sample, removing the acid and fixing volume, conducting detection with a graphite furnace atomic absorption spectrophotometer, etc. The method overcomes the shortcoming of the prior art in processing the sample. Compared with the traditional electric heating plate digestion manner, the microwave digestion manner can reduce the usage of samples and strong acid, improve digestion ability, cause less loss to elements to be detected in the sample and less damage to an operator, and facilitate operation. The digestion system of compound acid is completely applicable to the special material of the cigarette used tipping paper. The acid removing process is quick and easy, and a matrix modifier is adopted to eliminate interference. After being detected by optimal heating up programs, ashing temperature and atomization temperature related to atomic absorption spectrometry, the special material of the cigarette used tipping paper is recovered with high rate, and detected with accurate result. The working efficiency and the economic benefits are significantly improved.

Description

Technical field: [0001] The invention belongs to the technical field of physical and chemical inspection of tipping paper for cigarettes, and mainly relates to the technical field of measuring trace elements of tipping paper for cigarettes, in particular to a method for directly measuring cadmium content in tipping paper for cigarettes by using a graphite furnace atomic absorption spectrometer method. Background technique: [0002] According to the requirements of my country's health law, safety and health inspections should be carried out for various products that directly contact the human oral cavity. As people pay more and more attention to smoking and health issues, the safety, sanitation and environmental protection of smoking materials are getting more and more attention from all aspects. Among them, the content of heavy metals, as one of the safety indicators, has attracted more and more attention at home and abroad. However, there is no literature report on the qu...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/28
Inventor 胡清源侯宏卫唐纲岭朱风鹏张艳革庞永强边照阳
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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