Electrochemical hydride generation atomic fluorescence spectrometry for detection of tin in canned foods using polyaniline-modified lead cathode.
An electrochemical hydride generation system with polyaniline-modified lead cathode was developed for tin determination by coupling with atomic fluorescence spectrometry. The tin fluorescence signal intensity was improved evidently as the polyaniline membrane could facilitate the transformation process from atomic tin to the SnH(4) and prevent the aggradation of Sn atom on Pb electrode surface. The effects of experimental parameters and interferences have been studied. The limit of detection (LOD) was 1.5 ng mL(-1) (3σ) and the relative standard deviation (RSD) was 3.3% for 11 consecutive measurements of 50 ng mL(-1) Sn(IV) standard solution.
Jiang
Xianjuan
X
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
Gan
Wuer
W
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China. Electronic address: wgan@ustc.edu.cn.
Wan
Lingzhong
L
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
Deng
Yun
Y
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
Yang
Qinghua
Q
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
He
Youzhao
Y
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
D000814:Aniline Compounds / Q000737:chemistry*; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D005504:Food Analysis / Q000379:methods*; D006859:Hydrogen / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D014001:Tin / Q000032:analysis*
D000814:Aniline Compounds; C416807:polyaniline; D007854:Lead; D014001:Tin; D006859:Hydrogen