Author/Authors :
Hajiaghababaei، L نويسنده Department of Chemistry, Islamic Azad University, Shahre rey Branch, Tehran, Iran. , , Badiei، A نويسنده School of chemistry, College of Science, University of Tehran, Tehran, Iran. , , Shaabani، N نويسنده Department of Chemistry, Islamic Azad University, Shahre rey Branch, Tehran, Iran. , , Ganjali، M. R نويسنده Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran. , , Mohammadi Ziarani، G نويسنده Department of Chemistry, Faculty of Science, Alzahra University, Tehran, Iran. , , Javadi Charani، M نويسنده School of chemistry, College of Science, University of Tehran, Tehran, Iran. ,
Abstract :
هر چند روش هاي بسياري براي شناسايي يون هاي سنگين مثل Cd2+ و Pb2+ و Zn2+ وجود دارد اما به دليل غلظت پايين اين يون ها در آب هاي محيط زيستي، مرحله ي پيش تغليظ مرحله ي ضروري مي باشد. در اين مقاله مزوحفره ي سيلان دار(LUS-1) عامل دار شده با اتيلن دي آمين به عنوان جاذب جديد براي پيش تغليظ يون هاي Cd2+ و Pb2+ و Zn2+ معرفي شد. فاكتور غني سازي در اين روش 100 و حد تشخيص براي Cd2+ و Pb2+ و Zn2+ بترتيب 0.05 و 0.45 و 0.03 ng/ml بدست آمد. ماكزيمم ظرفيت مزوحفره ي سيلان دار عامل دار شده براي Cd2+ و Pb2+ و Zn2+ بترتيب 1.7±93.0 و 2.0±150 و 1.2±125 ??g به دست آمد.
Abstract :
In this work, a novel method is described for the preconcentration of
Pb2+
, Cd2+
and Zn2+
ions in environmental samples using uniform
silanized mesopor (LUS-1) functionalized by ethylenediamine
groups as a new extractant. The determination of ions is done by
inductively coupled plasma optical emission spectrometry (ICP-
OES). The extraction time and efficiency, pH and amount of
adsorbent, minimum amount of stripping acid and break-through
volume were investigated. The method’s enrichment factor is100 and
detection limit is 0.45, 0.05 and 0.03 ng mL-1
for Pb2+
, Cd2+
and Zn2+
respectively. The maximum capacity of the one mg of functionalized
LUS-1 was found to be 150.0 (±2.0) µg and 93.0 (±1.7) µg and 125.0
(±1.2) µg of Pb2+
, Cd2+
and Zn2+
respectively. The method was
applied successfully for the preconcentration and determination of
trace amounts of Pb2+
, Cd2+
and Zn2+
in water and food samples.
