摘要
对离子色谱法快速测定墓葬壁画土壤中4种阴离子(F^(-)、Cl^(-)、SO_(4)^(2-)、NO_(3)^(-))的测定方法进行了优化。采用L_(9)(3^(4))正交实验确定了样品预处理的最佳参数:准确称取1.000 g样品加入20 mL超纯水,在振荡温度20℃,振荡转速180 r/min条件下提取40 min。淋洗液为25 mmol/L的KOH溶液,分析柱为Ion Pac AS11-SH(250 mm×4.0 mm),净化后的滤液通过电导检测器测定。在此方法下,各离子的检出限为0.066~0.078 mg/L,相对标准偏差为0.77%~2.23%(n=7),回收率为95.9%~105.8%。
The ion chromatographic method for rapid determination of four anions(F-,Cl-,SO_(4)^(2-),NO_(3)^(-))in tomb murals was optimized.The L_(9)(3^(4))orthogonal test was used to determine the optimal parameters of sample pretreatment:1.000 g sample was accurately weighed and added with 20 mL ultrapure water,and extracted for 40 min under the conditions of oscillation temperature of 20℃and oscillation speed of 180 r/min.The eluent is 25 mmol/L KOH solution,and the analytical column is Ion Pac AS11-SH(250 mm×4.0 mm),and the purified filtrate is measured by conductivity detector.Under this method,the detection limit of each ion is 0.066~0.078 mg/L,the relative standard deviation is 0.77%~2.23%(n=7),and the recovery rate is 95.9%~105.8%.
作者
邱立萍
刘丽娜
张晓凤
QIU Li-ping;LIU Li-na;ZHANG Xiao-feng(Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region Ministry of Education,School of Water and Environmental,Chang’an University,Xi’an 710064,China)
出处
《应用化工》
CAS
CSCD
北大核心
2023年第5期1602-1605,共4页
Applied Chemical Industry
基金
陕西省重点研发计划项目(2022SSF-322)。
