Separation and determination of cadmium in water samples based on functionalized carbon nanotube by syringe filter membrane-micro solid-phase extraction
سال انتشار: 1400
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 54
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شناسه ملی سند علمی:
JR_AMECJ-4-1_007
تاریخ نمایه سازی: 14 آذر 1402
چکیده مقاله:
A simple and fast separation of cadmium (Cd) based on functionalized
carbon nanotubes with ۲,۳-dimercapto-۱-propanol (CNTs@DHSP)
was achieved in water samples before a determination by atom trap
flame atomic absorption spectrometry (AT-FAAS). In this study,
Cd(II) ions were extracted by syringe filter membrane-micro solid
phase extraction procedure(SFM-μ-SPE). Firstly, ۲۰ mg of the
CNTs@DHSP as solid-phase added to ۲۰ mL of water sample in
a syringe, then dispersed for ۳ min after adjusting pH up to ۷ and
pass through SFM very slowly. After extraction, the Cd(II) ions
were back-extracted from SFM/CNTs@DHSP by ۱.۰ mL of eluent
in acidic pH. Finally, the cadmium concentration was measured by
AT-FAAS. Under the optimal conditions, the linear range (۲–۹۰ μg
L−۱), LOD (۰.۷۵ μg L−۱) and enrichment factor (۱۹.۶) were obtained
(RSD<۱.۵%). The adsorption capacity of Cd(II) with the CNTs@
DHSP was obtained about ۱۵۲.۶ mg g-۱. The method was validated
by certified reference materials (SRM, NIST) and ET-AAS in water
samples.
کلیدواژه ها:
Cadmium ، Separation ، Water ، Functionalized carbon nanotubes ، Syringe filter membrane micro solid phase extraction ،
Atom trap flame atomic absorption spectrometry
نویسندگان
Jamshid Rakhtshah
Separation and determination of cadmium in water samples based on functionalized carbon nanotube by syringe filter membrane-micro solid-phase extraction