摘要
为了评价实验室空气中金属元素的浓度,开发了一种准确、高效的分析检测方法。将高纯液氩汽化时形成的冷凝冰碴作为样品载体,采用电感耦合等离子体质谱仪(Inductively Coupled Plasma Mass Spectrometry,ICP-MS)测定冷凝冰碴中12种金属元素的浓度,建立了一种冷凝收集ICP-MS测定实验室空气中金属元素的方法。该方法冷凝收集率为70.8%~85.8%,各元素线性相关系数R2均大于0.9999,检测限为0.001~0.019μg/L,定量限为0.003~0.063μg/L,6次重复测定的相对标准偏差均小于5%,加标回收率为80.5%~99.2%。该方法操作简便、检测效率高,检测限低,数据线性相关性良好,精密度和准确度良好。采用该方法测定某实验室空气冷凝收集样品中12种金属元素的含量,对比测定结果与标准方法职业接触限值,表明实验室空气中各元素浓度远低于职业接触限值对应浓度,该实验室空气中金属元素污染风险低。所建立的检测方法能准确、快速地测定空气中的多种金属元素含量,为实验室空气的安全性评价提供参考依据。
To evaluate the safety of metal element in laboratory ambient air,an accurate and efficient test method is developed.The condensed ice formed during vaporization of high purity liquid argon is used as sample carrier to determine the concentration of 12 kinds of metal elements in condensed ice by inductively coupled plasma mass spectrometer(CP-MS).A condensing collection ICP-MS method for the determination of metal elements in laboratory air is established.The condensation collection rates of the method are 70.8%~85.8%.The linear correlation coefficients R2 of all elements are greater than 0.9999,the detection limits are 0.001μg/L to 0.019μg/L,the limits of quantification are 0.003μg/L to 0.063μg/L,the relative standard deviations are all less than 5%for 6 repeated measurements,and the recoveries are 80.5%to 99.2%.The method has the advantages of simple operation,high analytical efficiency,good linear correlation,low detection limit,good accuracy and precision.The method is used to determine the content of 12 metal elements in the air condensation samples collected in a laboratory.Compared with the occupational exposure limits of the standard method,the measured results show that the concentration of each element in the air of the laboratory is far lower than the corresponding concentration of the occupational exposure limits,and the risk of metal element pollution in the air of the laboratory is low.The established detection method can accurately and quickly determine the content of various metal elements in the air,and provides a method reference for evaluating the safety of metal elements in the air of the laboratory.
作者
吴建伟
余珊丹
毕晨曦
马玉通
解多芬
杨盼盼
WU Jianwei;YU Shandan;BI Chenxi;MA Yutong;XIE Duofen;YANG Panpan(Yunnan Tongchuang Testing Technology Co.,Ltd.,Kunming 650106,China)
出处
《实验室研究与探索》
CAS
北大核心
2024年第9期10-14,24,共6页
Research and Exploration In Laboratory
基金
昆明高新技术产业开发区2023年省级制造业高质量发展项目(KMGX-GJZZ-2023-0012)。
关键词
冷凝收集
电感耦合等离子体质谱法
实验室空气
金属元素
condensation collection
inductively coupled plasma mass spectrometry
laboratory air
metallic element
作者简介
吴建伟(1986-),男,云南建水人,本科,工程师,主要研究方向为光谱分析、食品安全与质量控制。Tel.:15969446674,E-mail:kafu111@163.com;通信作者:杨盼盼(1986-),男,湖北荆州人,博士,高级工程师,主要研究方向为光谱分析技术应用。Tel.:18208859942,E-mail:290927746@qq.com。
