Method for detecting content of heavy metals in inner liner for cigarette

Abstract

The invention discloses a method for detecting the content of heavy metals in the lining liner of cigarette. The detection method comprises the following steps: 1, preprocessing the inner liner for cigarette: shearing the inner liner for cigarette by using sterile scissors to form chippings with the area of 5mm*5mm, placing the chippings in a sample plastic bottle, adding an acetic acid solution with the concentration of 0.5-6.0%, covering by using a cover, putting the covered bottle in an oven, setting the temperature at 25-80DEG C, allowing the covered bottle to stand for 1-12h, taking out the covered bottle, cooling to room temperature, centrifuging through a high speed centrifuge, and taking out the upper clear liquid to form a liquid to be detected; 2, making a standard working curve; and 3, determining the content of arsenic, lead, cadmium, chromium and nickel. The method fills the gap in the method for detecting the content of heavy metals in the inner liner in industry, and has the advantages of preprocessing of the inner liner for cigarette without a strong acid or a strong oxidizing solvent, simple operation, prevention of the generation of a toxic and harmful waste liquid, high detection safety, and detection accuracy increase due to no detection microwave digestion treatment before the detection.

Description

technical field [0001] The invention relates to a method for detecting heavy metal elements, in particular to a method for detecting heavy metal content in inner lining paper for cigarettes, and belongs to the technical field of chemical detection. Background technique [0002] At present, among the cigarette papers, the heavy metal limit requirements are clearly stated--cigarette tipping paper and tipping paper base paper, but there is no unified standard for the content of heavy metals in the inner lining paper of cigarettes that does not directly contact with the consumer's mouth. However, the inner lining paper for cigarettes is a packaging material that is in direct contact with cigarettes, and the heavy metals in it will transfer to cigarettes, which will affect the safety of smoking and the quality of cigarettes. [0003] For the detection of heavy metal content in cigarette lining paper, laboratories in the industry basically borrow the method for determining heavy m...

AI Technical Summary

Problems solved by technology

The test methods are YC / T 268 "Determination of Arsenic and Lead in Cigarette Tipping Paper and Base Paper (Graphite Furnace Atomic Absorption Spectrometry)", YC / T 278 "Determination of Mercury in Cigarette Tipping Paper (Cold Atomic Absorption Spectrometry)" Absorption Spectrometry)", YC / T 279 "Determination of Cadmium, Chromium and Nickel in Cigarette Tipping Paper (Graphite Furnace Atomic Absorption Spectrometry)", YC / T 316-2009 "Cigarette Tipping Paper and Cigarette Tipping Paper Determination of Arsenic, Lead, Cadmium, Chromium, Nickel, Mercury in Base Paper (Inductively Coupled Plasma Mass Spectrometry)", the detection of heavy metal elements by the above method generally uses microwave digestion to pre-treat the sample, in the pre-treatment process need to use strong acid or strong oxidizing reagent, and then use atomic spectrophotometer or plasma mass spectrometer to quantitatively detect it. Reagents, there is a certain risk in the testing process

[0004] At the same time, when the inner lining paper for cigarettes is tested after complete digestion, in the pretreatment process of the sample, although various acids used for digestion are added to the sample according to a certain amount, some samples still exist after digestion. Suspended particles lead to incomplete digestion, which affects the accuracy of test results

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