Method for measuring mercury content in loading paper for cigarette

A technology for cigarette tipping paper and measurement methods, which is applied in the direction of color/spectral characteristic measurement, etc., and can solve problems such as acid removal conditions, unsuitable measurement conditions, turbidity of the solution, and color

Active Publication Date: 2009-01-21
ZHENGZHOU TOBACCO RES INST OF CNTC
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Problems solved by technology

[0007] From the above results, for the same sample, the mercury results tested by the national recommended standard 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 cannot be completely digested, the solution is turbid and has a large amount of

Method used

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  • Method for measuring mercury content in loading paper for cigarette
  • Method for measuring mercury content in loading paper for cigarette
  • Method for measuring mercury content in loading paper for cigarette

Examples

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Example Embodiment

[0063] Example 1:

[0064] 1. Apparatus and reagents: Mars type airtight microwave digestion apparatus, equipped with TFM microwave digestion tank (CEM Corporation, USA). DKQ-4 type intelligent temperature control electric heater (Shanghai Yi Yao Analytical Instrument Co., Ltd.). Flow injection-cold atomic absorption spectrometer: FIMS400 type flow injection mercury measuring instrument, AS 90 type autosampler (Perkin Elmer, USA). Plastic volumetric flask: 50, 100mL. Electronic balance, CP225D type, with a sensitivity of 0.0001g (Sartorius AG). Pipette gun: 50-100μL. Pipette: 1, 10mL.

[0065] Ultra-pure water. Concentrated nitric acid with a mass percentage of 65%, hydrofluoric acid with a mass percentage of 40%, hydrochloric acid with a mass percentage of 37%, and hydrogen peroxide with a mass percentage of 30% (all premium grade pure, MerckKgaA, Germany). Tipping paper for cigarettes (cigarette manufacturer). Sodium borohydride, sodium hydroxide, and potassium permanganate are ...

Example Embodiment

[0069] Example 2:

[0070] As described in Example 1, the tipping paper sample with brand B was selected, and the mercury in the sample was measured at 0.608 mg / kg.

Example Embodiment

[0071] Example 3:

[0072] As described in Example 1, the tipping paper sample of brand C was selected, and the mercury in the sample was measured to be 0.032 mg / kg.

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Abstract

The invention relates to a method for testing the content of mercury in tipping paper for cigarette, which comprises using 3% hydrochloric acid to do constant volume to a certain volume after a tipper paper sample for cigarette is digested by mixed acid, utilizing sodium borohydride which contains sodium hydroxide to be reducing agent in the environment of strong acid-hydrochloric acid, deacidizing mercury in an ionic condition to elemental mercury, utilizing argon gas to be a carrier, and blowing vapor with mercury atoms under normal temperature in a cold atomic absorption spectrometry instrument to measure. Mercury atoms have a strong absorption function to a resonance line whose wavelength is 253.7nm, and the relationship between the size of absorption and the concentration of mercury atoms is in accordance with the beer law in a certain concentration scope, and the mercury atoms are compared with standard series to do constant volume. The method overcomes the shortcomings of the sample handling method in the prior art, which optimizes the concentration of acid, sodium borohydride and sodium hydroxide and the flow of carrier gas (argon gas) in a flow-injection cold atomic absorption spectrometry instrument. The invention has the advantages of simple operation, quick speed, accuracy, excellent sensitivity and repeatability.

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 determination of trace elements in tipping paper for cigarettes, in particular to a method for directly measuring mercury in tipping paper for cigarettes by using a flow injection-cold atomic absorption spectrometer content 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...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 侯宏卫唐纲岭陈再根杨进李雪朱风鹏庞永强边照阳张洪非胡清源
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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