DOI: 10.16597/j.cnki.issn.1002-154x.2025.01.005
工业盐铅、镉测试中基体改进剂的应用研究
董耀 刘春辉∗朱晓蕾 周璐 黄婷 吴蔚鹏 徐晓萍
(江苏省生产力促进中心, 南京 210001)
摘 要 建立了原子吸收光谱仪(AAS)测定工业盐中的铅、镉含量的分析方法。样品经消解后直接用AAS分析，采用在线引入基体改进剂溶液校正基体干扰和仪器的信号漂移。该方法检测时，铅的质量浓度在0~40μg·L-1范围，检出限为0.01mg·kg-1；镉的质量浓度在0~1.6μg·L-1范围，检出限为0.001mg·kg-1，均与信号强度呈良好的线性，线性相关系数(R2)均大于0.9990。铅、镉实际样品加标回收率为90.1%~114%，测定结果的相对标准偏差均小于2%（n=7）。该方法选择性强、灵敏度高，能有效克服基体干扰，测定结果准确。
关键词 原子吸收光谱法 铅 镉 工业盐
Research on the Application of Matrix Modifier in Industrial Salt Lead and Cadmium Testing
DONG Yao LIU Chunhui∗ZHU Xiaolei ZHOU Lu HUANG Ting WU Weipeng XU Xiaoping
(Productivity Centre of Jiangsu Province, Nanjing 210001, China)
Abstract A method was developed for the determination of lead and cadmium in industrial salt by atomic absorption spectrometer(AAS). Samples were directly determined by AAS after being digested with on-line matrix modifier to correct the instrument signal drift. The mass concentration of lead is in the range of 0~40μg·L-1, with a detection limit of 0.01mg·kg-1. The mass concentration of cadmium is in the range of 0~1.6μg·L-1, with a detection limit of 0.001mg·kg-1. All of them show good linearity with signal strength, and the linear correlation coefficients(R2) are all greater than 0.9990. The relative standard deviation of detection results are less than 2% (n=7), and the recovery was between 90.1% and 114%. Therefore, the method is highly selective, sensitive and accurate.
Keywords atomic absorption spectrometer lead cadmium industrial salt