氮掺杂石墨烯分散固相萃取-火焰原子吸收光谱法测定水样中痕量铜  

Determination of trace amounts of copper in water by FAAS after dispersive solid phase extraction using nitrogen doped graphene

作　　者：甄亚斐 贾鸿瑞 梁军 韩仁杰 董权权 任莉 马晓艳[1] ZHEN Ya-fei;JIA Hong-rui;LIANG Jun;HAN Ren-jie;DONG Quan-quan;REN Li;MA Xiao-yan(College of Materials and Chemistry＆Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China;Xinjiang Oilfield Company,Petrochina,Karamay 834000,China)

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]新疆油田分公司新港公司,新疆克拉玛依834000

出　　处：《化学研究与应用》2018年第11期1836-1842,共7页Chemical Research and Application

基　　金：国家大学生创新创业训练计划项目(201710616072)资助

摘　　要：以氮掺杂石墨烯(NG)为分散固相萃取(DSPE)吸附剂,建立了NG富集分离--火焰原子吸收光谱(FAAS)测定水样中痕量Cu2+的方法。当萃取溶液的p H值为6. 0,NG用量为30. 0 mg,萃取时间为20 min,洗脱剂为1. 50 mol·L-1的硝酸溶液时,Cu2+的富集因子达80。Cu2+的线性范围为0. 5～80μg·L-1,相关系数(R2)为0. 9988,检出限为0. 45μg·L-1,相对标准偏差小于3. 1%。此方法成功地应用于自来水、公园湖水、地下水中铜离子含量的测定,其加标回收率为96%～103%。A method was developed for the determination of trace amounts of Cu^2＋ in water samples using nitrogen doped graphene（NG）as solid sorbents of DSPE in combination with FAAS technology.The main factors influencing the extraction of Cu^2＋ ,pH value of the extraction solution,the amount of NG,extraction time,eluent,the volumeof sample,were investigated,and the effect of foreign metals were evaluated too.Under the optimized conditions,the enrichment factor of Cu^2＋ was 80.The calibration graph was linear in the range of 0.5～80 μg·L ^-1 with a correlation coefficient better than 0.9988.The detection limit was 0.45 μg·L^ -1 and the relative standard deviation was less than 3.1%.The proposed method was successfully applied to measure trace Cu ^2＋ in different types of environment waters with satisfactory results,and the recovery was in the range of 96%～103%.

关 键 词：氮掺杂石墨烯 预富集 分散固相萃取 火焰原子吸收 铜 环境分析 

分 类 号：O657.31[理学—分析化学]