Spectrophotometric Determination of Hg2+ after Solid Phase Extraction on Microcrystalline Naphthalene

محورهای موضوعی : Journal of Physical & Theoretical Chemistry

M. Reza Shishehbore ¹ , Navid Nasirizadeh ² , A. Mohammad Akhoundi ³

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تاریخ دریافت : 1394/02/19 تاریخ پذیرش : 1394/02/19 تاریخ انتشار : 1387/05/11

کلید واژه: Mercury determination, Preconcentration, Spectrophotometry, 1, 5- Diphenylcarbazone, Microcrystalline Naphthalene,

چکیده مقاله :

Mercury is quantitatively retained with 1, 5-diphenylcarbazone (DPC) on microcrystallinenaphthalene in the pH range 6.5-8.5 from a large volume of aqueous solutions of various samples.After filtration, the solid mass consisting of the mercury complex and naphthalene was dissolvedin 5.0 mL of dimethylformamide (DMF) and mercury was determined by spectrophotometricmethod at 542 nm against the reagent blank. The linear calibration range for mercury was 30-18001.tg L-1 in DMF solution with a detection limit of 20 lug L-1. The relative standard deviation foreight replicate measurements of 1.0 [ig of mercury in 5.0 mL of DMF was 2.5%. The effect ofpotential interfering ions was investigated and the proposed method was applied to thedetermination of mercury in water samples.