Journal of Guangxi Normal University(Natural Science Edition) ›› 2017, Vol. 35 ›› Issue (3): 111-118.doi: 10.16088/j.issn.1001-6600.2017.03.014

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Hydride Generation-Rhodamine 6G Fluorescence Method forthe Determination of Trace Arsenic

LI Chongning1,2, YANG Duo2, PAN Hongcheng1*, WEN Guiqing2, LIANG Aihui2, JIANG Zhiliang2*   

  1. 1. College of Chemistry and Bioengineering, Guilin University of Technology, Guilin Guangxi 541006;
    2. College ofEnvironment and Resource, Guangxi Normal University, Guilin Guangxi 541004, China
  • Online:2017-07-25 Published:2018-07-25

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Abstract: This paper introduces a new fluorescence method for the detection of trace arsenic in the Rh6G-I3 system. In sulfuric acid medium, arsenic is reduced by NaBH4 to form AsH3 which can reduce I-3 into I-. With I-3 conjugating with rhodamine 6G (Rh6G) to form Rh6G-I3 associated particles, the fluorescence intensity of Rh6G becomes weak at 562 nm. As I-3 ion is reduced by AsH3 resulting in the concentration increase of free Rh6G, its fluorescence intensity increases. Under the selected conditions, the increasing values (ΔF562) of the fluorescence intensity at 562 nm is linear in the range of 0.011～0.997 mg/L As, with the regression equation of ΔF = 825.1c-26.8 and a detection limit of 6.28 μg/L. Thus, a new fluorescence method for the detection of As was set up.

Key words: arsenic, hydride generation, rhodamine 6G, fluorescence

CLC Number: 

  • O657.3
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