Title of article :
Non-chromatographic screening method for the determination of mercury species. Application to the monitoring of mercury levels in Antarctic samples
Author/Authors :
Pacheco، نويسنده , , Pablo H. and Spisso، نويسنده , , Adriلn and Cerutti، نويسنده , , Soledad and Smichowski، نويسنده , , Patricia Aguilar Martinez، نويسنده , , Luis D.، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2010
Pages :
6
From page :
1505
To page :
1510
Abstract :
A simple non-chromatographic method for the determination of mercury (Hg2+), methylmercury (MeHg+), dimethylmercury (Me2Hg), and phenylmercury (PhHg+) employing atomic fluorescence spectrometry (AFS) as detection technique was developed. Mercury species showed a particular behavior in the presence of several reagents. In a first stage SnCl2 was employed for Hg2+ determination; in a second step, [Hg2+ + PhHg+] concentration was determined using SnCl2 and UV radiation. MeHg+ decomposition was prevented adding 2-mercaptoethanol. In a third stage, [Hg2+ + PhHg+ + MeHg+] concentration was determined using K2S2O8. Finally, the four species were determined employing NaBH4. Reagents concentration and flow rates were optimized. The extraction technique of mercury species involved the use of 2-mercaptoethanol as ion-pair reagent. The limits of detection for Hg2+, PhHg+, MeHg+, and Me2Hg were 1, 40, 68, and 99 ng L−1 with a relative standard deviation of 1.5, 3.1, 4.7 and 5.8%, respectively. Calibration curve was linear with a correlation factor equal to 0.9995. The method was successfully applied to the determination of the mercury species in two Antarctic materials: IRMM 813 (Adamussium colbecki) and MURST-ISS-A2 (Antarctic Krill).
Keywords :
Screening method , Mercury species , Adamussium colbecki , Antarctic krill
Journal title :
Talanta
Serial Year :
2010
Journal title :
Talanta
Record number :
1660720
Link To Document :
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