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Flue gas trapping and absorption apparatus and its uses in cigarette flue gas heavy metal element determination

An absorption device and flue gas capture technology, which is applied in the direction of measuring devices, sampling devices, instruments, etc., can solve the problems of inability to fully reflect the heavy metal content of flue gas, and achieve low detection limit, increased surface area, and high detection sensitivity. Effect

Inactive Publication Date: 2011-10-05
YUNNAN RES INST OF TOBACCO SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only capture the heavy metals in the flue gas particulate matter, and cannot fully reflect the heavy metal content in the flue gas.

Method used

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  • Flue gas trapping and absorption apparatus and its uses in cigarette flue gas heavy metal element determination
  • Flue gas trapping and absorption apparatus and its uses in cigarette flue gas heavy metal element determination
  • Flue gas trapping and absorption apparatus and its uses in cigarette flue gas heavy metal element determination

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Take one cigarette sample of a certain brand, balance it under the conditions specified in the GB / T 16447 standard, and select cigarettes with an average weight of ±0.02g and an average draw resistance of ±49Pa as test cigarettes; seal the cigarettes in the smoke trap On the suction port machine of the absorber, under the conditions specified in the YC / T 29 standard, use a smoking machine to suck from the exhaust port of the smoke collecting absorber. The suction capacity of each port is 35.0±0.3mL, and the suction time is 2± 0.1s, the puffing interval is 30±s, and 20 cigarettes are puffed each time; 35ml of 5% nitric acid is used as the trapping agent for the flue gas; Pour out the trapping liquid, and ultrasonically clean the absorber with 7.0mL of 5% nitric acid twice, combine the solution and the trapping liquid, and then set the volume to 50mL; at the same time, make a control blank sample according to the conventional process. The results of the determination of h...

Embodiment 2

[0035] Take one cigarette sample of a certain foreign brand, balance it under the conditions specified in GB / T 16447, select the cigarettes with an average weight of ±0.02g and an average draw resistance of ±49Pa as the test cigarettes; seal the cigarettes in the smoke On the suction port of the trapping absorber, under the conditions specified in the YC / T 29 standard, use a smoking machine to suck from the exhaust port of the flue gas trapping absorber. The suction capacity of each port is 35.0±0.3mL, and the suction time is 2 ±0.1s, the puffing interval is 30±s, 20 cigarettes are puffed each time; 35ml of 5% nitric acid is used as the trapping agent for the flue gas; Pour out the trapping solution, clean the absorber twice with 7.0mL of 5% nitric acid ultrasonically, combine the solution and the trapping solution, and then set the volume to 50mL; at the same time, make a control blank sample according to the conventional process. The results of the determination of heavy met...

Embodiment 3

[0039] Take one cigarette sample of a certain brand, balance it under the conditions specified in the GB / T 16447 standard, and select cigarettes with an average weight of ±0.02g and an average draw resistance of ±49Pa as test cigarettes; seal the cigarettes in the smoke trap On the suction port machine of the absorber, under the conditions specified in the YC / T 29 standard, use a smoking machine to suck from the exhaust port of the smoke collecting absorber. The suction capacity of each port is 35.0±0.3mL, and the suction time is 2± 0.1s, the puffing interval is 30±s, and 20 cigarettes are puffed each time; 35ml of 5% nitric acid is used as the trapping agent for the flue gas; Pour out the trapping liquid, and ultrasonically clean the absorber with 7.0mL of 5% nitric acid twice, combine the solution and the trapping liquid, and then set the volume to 50mL; at the same time, make a control blank sample according to the conventional process. The results of the determination of h...

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Abstract

The invention discloses a method for measuring heavy metal elements in cigarette smoke gas by using a smoke gas capturing and absorbing device, including the following working procedures: A, injecting a capturing agent, namely 35 ml of nitric acid with the concentration of 5% in the smoke gas capturing and absorbing device for capturing the heavy elements in the cigarette smoke gas; B, treating the cigarette smoke to be measured; C, selecting working parameters of a measurement apparatus; D, adopting an interference correction formula commended by the EPA 200.8 method to deducting the common ion interference; adjusting the measurement concentration of the sample, preparing standard solutions of the Pb, As, Cd, Cr, Ni and Hg and respectively adding an internal standard solution, measuring by using a plasma mass spectrometer. The smoke gas capturing and absorbing device comprises an external sleeve 1, an internal sleeve 2 and a sealing plug 3, in which an upper sieve plate 6 and a lower sieve plate 4 are arranged in the internal sleeve 2; a damping filler 5 is filled between the two sieve plates. The detection limit of 6 types of heavy metal elements in the smoke gas by the inventive method is between 0.003mu g / L and 0.008mu g / L; the correlation coefficient is equal to or more than 0.9990; the recovery is between 85 percent and 103 percent; the RSD is less than 3.4 percent. The method has the advantages of high sensitivity of detection, low detection limit, excellent accuracy and precision, and can satisfy the requirements for analysis of trace heavy metal elements in the cigarette smoke.

Description

technical field [0001] The invention belongs to the technical field of analyzing and measuring harmful components in cigarette smoke, and in particular relates to a method for measuring heavy metal elements in cigarette smoke by using a smoke collecting and absorbing device based on inductively coupled plasma mass spectrometry (ICP-MS) technology. Background technique [0002] Cigarette is a special food. With the deepening of smoking and health campaigns, people pay more and more attention to the safety of cigarette smoking. Heavy metal elements are a kind of important harmful components in cigarettes. Therefore, accurate determination of heavy metal elements in cigarette smoke has practical significance for ensuring the safety of tobacco. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) is a new analysis and testing technology developed rapidly in recent years. Its main features are high sensitivity, low detection limit, wide linear detection range (up to 8 orders of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/24G01N27/64
Inventor 李银科施红林贺斌金永灿缪恩明陈章玉杨光宇
Owner YUNNAN RES INST OF TOBACCO SCI
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