Measuring method for cobalt content in lining paper of cigarette

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; ...

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 of multiple elements; the ICP-MS method has been widely used in arsenic, lead, cadmium and other elements. The analysis of the cobalt element, but the analysis report for the cobalt element is less; the determination method and the patent of the cobalt element in the relevant cigarette inner liner paper have not been reported. The determination method of the reagent is of great significance for improving the quality and safety of cigarette products and further exploring the harm reduction of cigarettes

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