Preparation method for benzene and benzene series mixed solution reference substance used for cigarette paper analysis

Abstract

The invention discloses a preparation method for a benzene and benzene series mixed solution reference substance used for cigarette paper analysis. The method comprises the following steps: 1), selecting glyceryl triacetate and removing moisture thereof; 2), according to the concentration requirement of the required benzene and benzene series mixed solution reference substance, weighing benzene and benzene series respectively, adding into glyceryl triacetate, and mixing and standing for a night; 3), under the protection by nitrogen, packaging the mixed solution reference substance obtained in step 2); 4), inspecting the packaged reference substance; and 5), determining values of benzene and benzene series in the reference substance by utilizing single certified reference material. According to the invention, glyceryl triacetate with high boiling point is used as a solvent to prepare the benzene and benzene series mixed solution reference substance for determining the residual quantity of benzene and benzene series in the cigarette paper, so that the preparation method improves the stability and the detection efficiency of an analysis and treatment system, and enables the analysis result to be more accurate.

Description

technical field [0001] The invention belongs to the technical field of residual analysis of volatile organic compounds in cigarette paper, and in particular relates to a method for preparing a standard substance of a mixed solution of benzene and benzene series for analysis of cigarette paper. Background technique [0002] The residual benzene and benzene series in cigarette paper (wrapping paper, tipping paper, inner liner paper) mainly come from printing paper, ink and solvent. These benzene and benzene series may affect the quality of cigarette products. For this reason, the tobacco industry has formulated YC 263-2008 "Limits of Volatile Organic Compounds in Cigarette Rod and Packing Paper", which stipulates the maximum amount of benzene and benzene series in cigarette paper. residue. Tobacco industry and related industries generally adopt headspace gas chromatography technology and external standard method for the determination of benzene and benzene series residues in ...

AI Technical Summary

Problems solved by technology

This method needs to use the base paper of cigarette paper as a matrix calibrator, and the operation is cumbersome. If a reagent with a low boiling point is used as a solvent to prepare a standard solution, it will inevitably bring unnecessary analysis errors. However, the existing standard substances of benzene and benzene series solutions in my country The solvents used are methanol and n-hexane. Methanol and n-hexane have low boiling points. Using them for the analysis of benzene and benzene series remaining in cigarette paper will bring unnecessary errors

Images