离子液体分散液液微萃取-石墨炉原子吸收法测定水中钯  

Determination of Trace Palladium in Water by Ionic Liquid-Dispersive Liquid-Liquid Microextraction Combined with Graphite Furnace Atomic Absorption Spectrometry

作　　者：霍燕燕[1] 刘亚奇 韩权[1,2] 杨晓慧[1] HUO Yanyan;LIU Yaqi;HAN Quan;YANG Xiaohui(School of Chemical Engineering,Xi'an University,Xi'an 710065,China;School of Chemistry and Chemical Engineering,Yan'an University,Yan'an 716000,China)

机构地区：[1]西安文理学院化学工程学院,西安710065 [2]延安大学化学与化工学院,陕西延安716000

出　　处：《西安文理学院学报(自然科学版)》2025年第1期67-72,共6页Journal of Xi’an University(Natural Science Edition)

基　　金：本实验由西安市食品安全检测与风险评估重点实验室资助

摘　　要：以自制试剂5-(5-氰基-2-吡啶偶氮)-2,4-二氨基甲苯(5-CN-PADAT)为络合剂、1-己基-3-甲基咪唑六氟磷酸盐([C_(6)mim][PF_(6)])为萃取剂和乙腈为分散剂,建立了离子液体-分散液液微萃取结合石墨炉原子吸收法测定水中痕量钯的新方法.采用单因素轮换法对影响分散液液微萃取的因素进行优化.在最佳条件下,钯浓度在1.6~12.0 ng/mL间线性良好,相关系数为0.996 1,检出限为0.40 ng/mL(n=11).对质量浓度为10.0 ng/mL的钯标准溶液测定11次,相对标准偏差(RSD)为3.36%.该方法具有灵敏度高、操作简便和耗时短等特点,可用于水样中痕量钯的测定.A new method for the determination of trace palladium in water by ionic liquiddispersive liquid-liquid microextraction coupled with graphite furnace atomic absorption spectrometry has been established,sing newly synthesized reagent 5-(5-cyano-2-pyridinylazo)-2,4-diaminotoluene(5-CN-PADAT)as the chelating agent,1-hexyl-3-methylimidazole hexafluorophosphate([C_(6)mim][PF_(6)])as the extraction solvent and acetonitrile as the dispersive solvent.The factors affecting the dispersive liquid-liquid microextraction were optimized by the-factor rotation method.Under the optimal conditions,the linearity of the palladium concentration was good between 1.6 and 12.0 ng/mL,with a correlation coefficient of 0.9961 and detection limit of 0.40 ng/mL(n=11).The relative standard deviation(RSD)of the palladium standard solution at the mass concentration of 10.0 ng/mL was 3.36%for 11 determinations.The method is characterized by high sensitivity,simple operation and short-time consumption,which can be used for the determination of trace palladium in water samples.

关 键 词：离子液体 分散液液微萃取 5-(5-氰基-2-吡啶偶氮)-2 4-二氨基甲苯 钯 石墨炉原子吸收法 

分 类 号：X832[环境科学与工程—环境工程] O657.31[理学—分析化学]