电感耦合等离子体质谱法测定可降解餐盒中铅的不确定度评定
Evaluation of Uncertainty in the Determination of Lead in Degradable Meal Boxes by Inductively Coupled Plasma Mass Spectrometry
董丹丹 1马玉婷 1牛记者 1王斌 1戴婕妤 1王莲芳 1叶峰1
作者信息
- 1. 杭州市余杭区食品药品监测中心,浙江 杭州 311199
- 折叠
摘要
本文对可降解餐盒中铅含量进行测定,探索影响可降解餐盒中铅检测结果测量不确定度的主要因素及降低不确定度的具体方法.结果表明,植物基可降解餐盒中铅的含量为 0.75 mg·kg-1,扩展不确定度为0.03 mg·kg-1,测定结果表示为(0.75±0.03)mg·kg-1,k=2.影响测定结果可靠性的主要因素是拟合曲线引入的不确定度,其次是样品重复性测量、标准系列溶液配制、样品称量和消解过程中引入的不确定度,样品消解液定容引入的不确定度可忽略不计.
Abstract
This article determines the lead content in biodegradable food boxes,explores the main reasons that affect the measurement uncertainty of lead detection results in biodegradable food boxes,and specific methods to reduce uncertainty.The results showed that the lead content in plant-based biodegradable food boxes was 0.75 mg·kg-1,with an expanded uncertainty of 0.03 mg·kg-1.The measurement result was expressed as(0.75±0.03)mg·kg-1,k=2.The main factor affecting the reliability of measurement results is the uncertainty introduced by the fitting curve,followed by the uncertainty introduced during sample repeatability measurement,standard series solution preparation,sample weighing,and digestion process.The uncertainty introduced by the constant volume of sample digestion solution can be ignored.
关键词
可降解餐盒/铅/电感耦合等离子体质谱法/不确定度Key words
degradable packing meal boxe/lead/inductively coupled plasma mass spectrometry/uncertainty引用本文复制引用
基金项目
浙江省市场监督管理局雏鹰计划培育项目(CY2023317)
出版年
2024
NETL
NSTL
万方数据