摘要
建立了用微波消解-电感耦合等离子体质谱(ICP-MS)法同时测定硫磺中18种微量元素(锂、镁、铝、钙、钒、铬、锰、铁、钴、镍、铜、锌、镉、砷、硒、钡、铅和汞)的方法。通过对消解所用试剂及条件进行研究,确定最佳的样品处理条件;采用单变量方法获得最佳的信噪比并降低光谱干扰,对ICP-MS的射频功率和雾化气体流量等因素进行了性能优化。结果显示,各元素的校准曲线线性相关系数在0.999以上,所有元素的检出限(LODs)在0.001~0.962 mg/kg,测定下限范围在0.004~3.9 mg/kg,加标回收率在82.9%~115%,相对标准偏差均小于3%。方法检出限低,精密度和准确度高。
A microwave digestion/inductively coupled plasma mass spectrometry(ICP-MS)method for simultaneous determination of 18 trace elements(lithium,magnesium,aluminum,calcium,vanadium,chromium,manganese,iron,cobalt,nickel,copper,zinc,cadmium,arsenic,selenium,barium,lead and mercury)in sulfur has been developed.The optimal conditions of sample treatment were determined by studying the reagent and conditions used for digestion.In order to obtain the best signal-to-base ratio and remove spectral interference,a univariate method was used to optimize the performance of ICP-MS,such as RF power and atomizing gas flow rate.The results showed that the linear correlation coefficients of the calibration curves were all above 0.999,the limits of detection(LODs)of all elements ranged from 0.001 to 0.962 mg/kg,the limits of determination ranged from 0.004 to 3.9 mg/kg,the recoveries ranged from 82.9%to 115%,and the relative standard deviations were all less than 3%.The method has low detection limit,high precision and high accuracy.
作者
蒋金花
徐新忠
王琳琳
吕新明
JIANG Jinhua;XU Xinzhong;WANG Linlin;LYU Xinming(School of Chemistry and Chemical Engineering,Shihezi University,Shihezi,Xinjiang 832003,China;Customs Technical Center of Alashankou,Alashankou,Xinjiang 833418,China;Xinjiang Ecological Environment Monitoring Station,Urumqi,Xinjiang 830011,China)
出处
《中国无机分析化学》
CAS
北大核心
2021年第6期107-113,共7页
Chinese Journal of Inorganic Analytical Chemistry
基金
新疆维吾尔自治区重点实验室开放性课题(2016D03011)。
