摘要
采用超声萃取结合离子色谱技术建立了同时测定白炭黑中微量钠离子和铵离子的方法.在优化实验条件下,钠离子和铵离子的线性范围分别是0.1~10mg·L^-1和0.1~4mg·L^-1,6次进样峰面积相对标准偏差分别为1.8%和0.9%;在白炭黑样品中,钠离子和铵离子的定量下限分别为3.5μg·g。和4.6μg·g^-1,二者的加标回收率在92%~108%之间.实验结果表明,该方法测试快速、灵敏,且不同类型的白炭黑产品中钠离子的含量差异显著,为该产品的质量控制提供了一种技术手段.
In this study, a method for simultaneous determination of trace NaT and NH+ in the silica has been developed by the ion chromatography technique combining with ultrasonic extraction. Under the optimized conditions, the linear range of Na and NH4^+ is 0.1-10 mg· L^-1 and 0.1-4 mg · L^-1 , and the corresponding relative standard deviation (RSD) is 1.80/00 and 0.9G, respectively. The detection limit is 3.5 μg ·g^-1 for Na^+ and 4.6μg · g^-1 for NH4^+ in analyzing the silica sample, and the recovery rate is in the range of 92% - 108%. This method is rapid and sensitive, and significant difference in the content of Na+ is obtained in the various silica samples. The method can be applied for the quality control of silica nrodl]cts.
出处
《杭州师范大学学报(自然科学版)》
CAS
2015年第1期11-14,48,共5页
Journal of Hangzhou Normal University(Natural Science Edition)
基金
国家自然科学基金青年科学基金项目(21205025)
作者简介
蒋可志(1980-),男,副研究员,博士,主要从事色谱、质谱研究.E-mail:jiangkezhi@hznu.edu.cn