| 摘要: |
| 目的 采用电感耦合等离子体质谱技术，同步检测砷、镉、钴、铬、铜、镍、铅、硒、锑等9种重金属元素，对不同木质餐具中的重金属含量和迁移量进行测定。方法 选择HNO3-H2O2为消解液，采用微波消解进行含量测定;选择体积分数为4%的乙酸及体积分数分别为10%、50%、95%的乙醇等4种模拟物，采用浸泡迁移的前处理方式对样品进行迁移量的测定。选择72Ge、209Bi、115In、45Sc作为内标元素来监控和校正信号的差异，采用四级杆碰撞反应池技术消除质谱干预，优化仪器工作条件。结果 含量测定线性相关系数r2≥0.999 9，检出限范围为0.002~0.2 μg/L，加标回收率范围为92.3%~103.1%;迁移量测定线性相关系数r2≥0.999 1，检出限范围为0.002~3.0 μg/L，加标回收率范围为91.7%~107.4%。结论 此方法具有快速、简便、准确度高等特点，适用于测定木质餐具的含量和迁移量。 |
| 关键词: 食品接触木质餐具 电感耦合等离子体质谱法测定 微波消解 重金属元素含量 迁移量 |
| DOI：10.19554/j.cnki.1001-3563.2025.01.015 |
| 分类号: |
| 基金项目: |
|
| Determination of Content and Migration of 9 Heavy Metals in Food-contact Wood Tableware Products |
|
DONG Shuai1, LEI Jing1, LIU Jinpeng1, QIU Kai2, YIN Lei1
|
|
(1. Hebei Institute of Product Quality Supervision and Inspection, Shijiazhuang 050000, China;2. Shandong Province Jinan Dikerei Instrument Co., Ltd., Jinan 250000, China)
|
| Abstract: |
| The work aims toestablish inductively coupled plasma mass spectrometry technology to simultaneously detect 9 heavy metal elements including arsenic, cadmium, cobalt, chromium, copper, nickel, lead, selenium, and antimony, and determine the content and migration of heavy metals in different wood tableware. HNO3-H2O2 was selected as the digestion solution and microwave digestion was adopted for content determination. 4 different simulated substances, namely 4% acetic acid, 10% ethanol, 50% ethanol, and 95% ethanol were selected, and the migration of the samples was determined by the pre-treatment method of immersion migration. 72Ge, 209Bi, 115In, and 45Sc were selected as internal standard elements to monitor and correct signal differences and a four-stage rod collision reaction cell technology was employed to eliminate mass spectrometry interference and optimize instrument operating conditions. The linear correlation coefficient r2 of migration determination was not less than 0.999 9, the detection limit range was 0.002-0.2 μg/L and the recovery range of standard addition was 92.3%-103.1%. The linear correlation coefficient r2 of migration determination was not less than 0.999 1, the detection limit range was 0.002-3.0 μg/L, and the recovery range of standard addition was 91.7%-107.4%. This method is characterized by its speed, simplicity, and high accuracy, and is suitable for determining the content and migration of wood tableware. |
| Key words: food-contact wood tableware determination by inductively coupled plasma mass spectrometry (ICP-MS) microwave digestion heavy metal content migration |
