兰州百合干中的二氧化硫本底值研究
2021-05-11李瑞琴于安芬陶海霞徐瑞
李瑞琴 于安芬 陶海霞 徐瑞


摘要:对采集的百合干生产厂家的百合干产品及实验室采集的鲜兰州百合并模拟百合干生产加工过程制作百合干采用凯氏蒸馏-滴定法测定百合干样品中的二氧化硫含量并对其进行对比分析,结果表明:鲜兰州百合自制百合干和百合干生产企业生产的百合干中均含有一定量的二氧化硫,即百合干中都含有二氧化硫本底值, 根据百合干中二氧化硫含量分布及频次,认为百合干中二氧化硫含量的本底值范围为2.22~6.50 mg/kg。
关键词:兰州百合;百合干;二氧化硫;本底值
中图分类号:S644.1 文献标志码:A 文章编号:1001-1463(2021)02-0041-04
doi:10.3969/j.issn.1001-1463.2021.02.010
Study on Background Value of Sulfur Dioxide in Dried Lily of Lanzhou
LI Ruiqin 1,2,3, YU Anfen 1,2,3, TAO Haixia 1,2,3, XU Rui 1,2,3
(1. Institute of Agricultural Quality Standards and Testing Technology, Gansu Academy of Agricultural Sciences, Lanzhou Gansu 730070, China; 2. Animal Husbandy, Pasture and Green Agricultural Institute, Gansu Academy of Agricultural Sciences, Lanzhou Gansu 730070, China 3. Laboratory of Quality and Safety Risk Assessment for Agro-products, Ministry of Agriculture, Lanzhou Gansu 730070, China)
Abstract:The content of sulfur dioxide in the sample was determined by kjeldahl distillation titration method through collecting dried lily products from lily manufacturers and collecting fresh lily in the laboratory and simulating the process of dried lily production. The results showed that there was a certain amount of sulfur dioxide in the dried lily made by fresh Lanzhou lily and the dried lily produced by the manufacturer, that is, the background value of sulfur dioxide in the dried lily. According to the distribution and frequency of sulfur dioxide content in lily stem, it is suggested that the background value of sulfur dioxide content in lily stem should range from 2.22 mg/kg to 6.5 mg/kg.
Key words:Lanzhou lily;Dried lily;Sulfur dioxide;Background value
兰州百合[Lilium davidii Duch.var.unicolor(Hoog)Gotton]是百合科百合属川百合的一个变种[1 - 9 ],是国家卫生部2011年公布的87种药食同源品(既是食品又是药品的物品)之一。兰州百合是甘肃省的名优特产,色泽洁白如玉、肉质肥厚香甜。我国著名植物分类学专家孔宪武教授评价:“兰州百合味极甜美、纤维很少、又毫无苦味,不但闻名全国,亦可称世界第一”[10 - 14 ]。但鲜兰州百合不易保存,为此,每年大量的鲜兰州百合需要加工成百合干[15 - 17 ]。近几年,随着食品安全意识的加强和消费市场的规范,超市、农贸市场抽查的百合干产品质量合格率都达到了100%。
二氧化硫是自然界植物体中常見的化合物,植物种属不同对二氧化硫的富集程度也有所不同。我国《食品安全国家标准食品添加剂使用标准》(GB2760—2014)明确规定:二氧化硫、焦亚硫酸钠等食品添加剂作为漂白剂、防腐剂、抗氧化剂,干……
