Abstract
The work aims to investigate the species of Indocalamus leaves used for food packaging in Huaihua and determine the contents of Cu, Zn, Pb, Cd, Cr, Hg and As in the samples, so as to provide basic data for establishing safety standard of Indocalamus leaves for food packaging. The species of Indocalamus leaves used in food packaging were investigated in 13 administrative cities, districts and counties through folk interviews and sample collection. With the content determination of tea reference materials as the quality control method, the contents of 7 metal elements, Cu, Zn, Pb, Cd, Cr, Hg and As in the Indocalamus leaves were determined by Atomic Absorption Spectroscopy and Hydride Atomic Fluorescence Spectroscopy. According to the survey and species identification, the Indocalamus leaves used for food packaging in Huaihua included Indocalamus latifolius, Indocalamus tessellatus (Munro) Keng f., Indocalamus decorus, Indocalamus guangdongensis and Indocalamus hispidus. The contents of seven elements in Indocalamus leaves were quite different and had no relation with the species. The contents of Zn were ranging from 12.93 to 47.10 mg/kg, Hg from 0.012 to 0.94 mg/kg, Cu from 3.02 to 9.39 mg/kg, Cr from 2.10 to 15.96 mg/kg, Pb from 0.33 to 2.55 mg/kg, Cd from 0.015 to 0.37 mg/kg, and As from 0.044 to 0.44 mg/kg. There are 5 species of Indocalamus for food packaging in Huaihua area, among which Indocalamus latifolius is the most widely distributed and used .The contents of 7 elements in Indocalamus leaves were quite different. The results of this study provide a reference for the selection of Indocalamus species for cultivation and the establishment of safety standards for Indocalamus leaves.
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LIU Li-ping, CHEN Hui, LUO Hong-quan, WANG Ning, TANG Xu-wen, YANG Bing.
Species Survey and Seven Elements Determination of Indocalamus Leaves for Food Packaging in Huaihua[J]. Packaging Engineering. 2022(5): 122-129 https://doi.org/10.19554/j.cnki.1001-3563.2022.05.017
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