A novel spectrofluorometric method for the determination of arsenic in human hair using Dy2O3-doped CeO2 nanoparticles

作者：Hosseini Mohammad Saeid^*; Belador Foroogh

来源：Analyst, 2014, 139(19): 5007-5013.

DOI：10.1039/c4an00746h

This paper describes a simple and inexpensive method for the determination of arsenic in human hair samples based on spectrofluorometric detection. The applied Dy2O3-doped CeO2 (DDC) nanoparticles were synthesized using microwave-induced combustion technique and subjected to analytical samples containing As(V) species. At optimum conditions (pH 6, DDC concentration 3 mg L-1 and excitation/emission wavelengths 250 nm/352 nm), the fluorescence emission of DDC nanoparticles was diminished by increasing the As(V) concentration present in the medium. The co-existent ions present in hair were not interfered. A method for the speciation of As(III) and As(V) is also described. The method was validated using a well-known separation/spectrofluorometric method. There was no significant difference at the 95% confidence level between the results of the two methods. The proposed method is characterized by a wide analytical concentration range (5.0 x 10(-8)-1.0 x 10(-5) M), a detection limit for As(V) of 1 x 10(-8) mol L-1 and relative standard deviation of 1.4%. The recoveries for the spiked amounts of As(V) was found to be 93.3-104.0%.

• 出版日期2014