Ion-association dispersive liquid- liquid micro extraction of ultra-trace amount of gold (III) in water samples using Aliquat 336 prior to Inductively Coupled Plasma Atomic Emission Spectrometry determination

  • سال انتشار: 1394
  • محل انتشار: کنفرانس بین المللی یافته های نوین پژوهشی در شیمی و مهندسی شیمی
  • کد COI اختصاصی: CHCONF01_174
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 875
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نویسندگان

Naeemeh Zari

aEnvironmental chemistry and Green Technology Department, Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran P.O.Box ۱۴۳۳۵-۱۸۶

Jalal Hassan

Department of Toxicology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran

Kourosh Tabar-Heidar

Environmental chemistry and Green Technology Department, Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran P.O.Box ۱۴۳۳۵-۱۸۶

Seyed Hamid Ahmadi

Environmental chemistry and Green Technology Department, Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran P.O.Box ۱۴۳۳۵-۱۸۶

چکیده

A combined method with dispersive liquid- liquid micro extraction (DLLME) and ICP-OES has been developed for rapid separation, pre-concentration and determination of ultra-trace amount of gold (III). The extraction of the analyte was performed in the presence of a quaternary ammonium salt, N-Methyl-N,N,N-trioctyloctan-1-ammonium chloride, (Aliquat 336) as an extractant based on ion- association extraction system. 1-octanol and acetonitrile were used as extraction and disperser solvents, respectively. The variables affecting the extraction conditions were optimized. The calibration curve was linear in the range of 0.32-100 ng mL-1 with the detection limit of 0.09 ng mL-1, enrichment factor of 150 and extraction recovery of 74%. The precision (%RSD) of the method was 6.2% for 5 replicates and recoveries of 10 ng mL-1 Au (III). The accuracy of the method was verified by an add- found method. This sensitive, simple and fast method was successfully applied to the extraction determination of gold in tap, lake, mining water samples.

کلیدواژه ها

gold, dispersive liquid- liquid micro extraction, Aliquat 336, Inductively coupled plasma atomic emission spectrometry

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