摘要
设计合成了一种亲水性温敏聚合物荧光探针,用于检测农产品中的Al^(3+)。通过可逆加成-断裂链转移(RAFT)聚合合成此聚合物荧光探针(L64-BTPA-SHMA),用 ~1H NMR对其进行表征,并通过荧光光谱对聚合物探针的识别性能进行了研究。结果表明,此聚合物荧光探针检测Al^(3+)的荧光响应信号受温度影响显著,温度越高,荧光强度越低。聚合物荧光探针在25℃和pH 7.4的缓冲溶液中对Al^(3+)有良好的选择性识别作用,且基本不受其它金属离子的影响。建立了基于此聚合物探针对Al^(3+)的荧光检测方法,响应信号与Al^(3+)浓度在2.0~18.0 μmol/L范围内呈线性关系,相关系数为0.9977,检出限为1.43 μmol/L。此聚合物荧光探针可应用于检测农产品中Al^(3+)残留,具有良好的实际应用价值。
A temperature-responsive hydrophilic block copolymer fluorescence sensor based on selective analysis of Al 3+was designed and synthesized.The polymer fluorescent probe(L64-BTPA-SHMA)was synthesized by reversible addition-fragmentation chain transfer(RAFT)polymerization and characterized by 1H NMR,and the recognition performance of the polymer probe was studied by fluorescence spectroscopy.It was found that the fluorescence response of Al 3+detected by this polymer fluorescence probe was significantly affected by temperature.The higher the temperature,the lower the fluorescence intensity was observed.The results showed that 0.1 g/L polymer fluorescent probe had a good selectivity to Al 3+in buffer solution at 25℃and pH 7.4,and was not affected by other metal ions.A fluorescence detection method based on this polymer probe for Al 3+was developed.In this method,the fluorescence intensity was linear with Al 3+concentration in the range of 2.0-18.0μmol/L,with a correlation coefficient of 0.9977 and a detection limit of 1.43μmol/L.The fluorescence response between the polymer fluorescence chemosensor and Al 3+could be altered by controlling the temperature change.The successful application of the polymer fluorescence probe for detecting Al 3+residues in agricultural products has practical application value.
作者
解雪乔
蔡云凤
韩娟
王赟
陈桐
李静
XIE Xue-Qiao;CAI Yun-Feng;HAN Juan;WANG Yun;CHEN Tong;LI Jing(Department of Medical Science and Technology,Suzhou Chien-shiung Institute of Technology,Taicang 215400,China;School of Food and Biological Engineering,Jiangsu University,Zhenjiang 212013,China;School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,China;Zhenjiang Entry-Exit Inspection and Quarantine Bureau,Zhenjiang 212008,China)
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2018年第4期502-510,共9页
Chinese Journal of Analytical Chemistry
基金
太仓市科技发展计划项目(No.TC2015NY05)
江苏省高校自然科学研究面上项目(16KJB550010)
镇江市重点研发计划项目(No.SH2016019)
江苏出入境检验检疫局科技计划项目(No.2017KJ47)资助~~
关键词
聚合物荧光探针
铝离子
检测
温度响应
水溶性
Polymer fluorescent probe
Aluminum ion
Detection
Temperature response
Water solubility
