Determination of trace amounts of zinc by flame atomic absorption spectrometry after preconcentration with modified clinoptilolite zeolite

被引：0

作者：

Hajialigol, Saeed ^{[1
]}

Taher, Mohammad Ali ^{[1
]}

Malekpour, Akbar ^{[2
]}

机构：

[1] Shahid Bahonar University of Kerman, Department of Chemistry, Kerman 76175-133, Iran

[2] University of Isfahan, Department of Chemistry, Isfahan, 81746/73441, Iran

来源：

Journal of AOAC International | 1600年 / 91卷 / 06期

关键词：

Natural clinoptilolite was used as a sorbent material for solid-phase extraction and preconcentration of zinc. Clinoptilolite was first saturated with cadmium (II) and then modified with benzyldimethyltetradecylammonium chloride for increasing adsorption of 3-(2-arsenophenylazo)-4,5-dihydroxy-2,7-naphthalene disulfonic acid (neothorin). Zinc was quantitatively retained on the adsorbent by the column method in the pH range of 3.8-4.2 at a flow rate of 1 mL/min. It was eluted from the column with 5.0 mL 2 M nitric acid solution at a flow rate of 1 mL/min and determined by flame atomic absorption spectrometry at 213.9 nm. Zinc could be concentrated from a 0.03 μg/L solution with a preconcentration factor of 170. Relative standard deviation for 8 replicate determinations of 2.5 μg zinc in the final solution was 0.92%. The interference of a large number of anions and cations was studied in detail to optimize the conditions, and the method was successfully applied for determination of zinc in standard and real water samples;

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摘要：

Journal article (JA)

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页码：1446 / 1452