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@article{673e0749744e4179bffdfa3f61de62b9,
title = "Rapid Determination of Technetium-99 in Large Volume Seawater Samples Using Sequential Injection Extraction Chromatographic Separation and ICP-MS Measurement",
publisher = "American Chemical Society",
author = "Keliang Shi and Jixin Qiao and Wangsuo Wu and Per Roos and Xiaolin Hou",
year = "2012",
doi = "10.1021/ac301319a",
volume = "84",
number = "15",
pages = "6783--6789",
journal = "Analytical Chemistry",
issn = "0003-2700",

}

RIS

TY - JOUR

T1 - Rapid Determination of Technetium-99 in Large Volume Seawater Samples Using Sequential Injection Extraction Chromatographic Separation and ICP-MS Measurement

A1 - Shi,Keliang

A1 - Qiao,Jixin

A1 - Wu,Wangsuo

A1 - Roos,Per

A1 - Hou,Xiaolin

AU - Shi,Keliang

AU - Qiao,Jixin

AU - Wu,Wangsuo

AU - Roos,Per

AU - Hou,Xiaolin

PB - American Chemical Society

PY - 2012

Y1 - 2012

N2 - An automated method was developed for rapid determination of 99Tc in large volume seawater samples. The analytical procedure involves preconcentration of technetium with coprecipitation, online separation using extraction chromatography (two TEVA columns) implemented in a sequential injection setup, and measurement of 99Tc by inductively coupled plasma mass spectrometry (ICP-MS). Chromatographic behaviors of technetium, molybdenum, and ruthenium were investigated, and the mechanism of adsorption and elution of TcO4– on a TEVA column using HNO3 was explored. The results show that not only NO3– but also acidity (or concentration of H+) of the loading or eluting solution affect the adsorption and desorption of TcO4– on TEVA resin. Decontamination factors of more than 1 × 106 for ruthenium and 5 × 105 for molybdenum are achieved. Chemical yields of technetium in the overall procedure range from 60% to 75% depending on the sample volumes, and a detection limit of 7.5 mBq/m3 (or 11.5 pg/m3) for 200 L of seawater was obtained. Compared with the conventional analytical procedure, the developed method significantly reduces analytical time. A batch of samples (n > 4) can be analyzed within 24 h. The method has been successfully applied for rapid and automated determination of low level 99Tc in large volume seawater samples. The analytical results of seawater samples collected in Denmark show a good agreement with the values obtained using the conventional method.

AB - An automated method was developed for rapid determination of 99Tc in large volume seawater samples. The analytical procedure involves preconcentration of technetium with coprecipitation, online separation using extraction chromatography (two TEVA columns) implemented in a sequential injection setup, and measurement of 99Tc by inductively coupled plasma mass spectrometry (ICP-MS). Chromatographic behaviors of technetium, molybdenum, and ruthenium were investigated, and the mechanism of adsorption and elution of TcO4– on a TEVA column using HNO3 was explored. The results show that not only NO3– but also acidity (or concentration of H+) of the loading or eluting solution affect the adsorption and desorption of TcO4– on TEVA resin. Decontamination factors of more than 1 × 106 for ruthenium and 5 × 105 for molybdenum are achieved. Chemical yields of technetium in the overall procedure range from 60% to 75% depending on the sample volumes, and a detection limit of 7.5 mBq/m3 (or 11.5 pg/m3) for 200 L of seawater was obtained. Compared with the conventional analytical procedure, the developed method significantly reduces analytical time. A batch of samples (n > 4) can be analyzed within 24 h. The method has been successfully applied for rapid and automated determination of low level 99Tc in large volume seawater samples. The analytical results of seawater samples collected in Denmark show a good agreement with the values obtained using the conventional method.

U2 - 10.1021/ac301319a

DO - 10.1021/ac301319a

JO - Analytical Chemistry

JF - Analytical Chemistry

SN - 0003-2700

IS - 15

VL - 84

SP - 6783

EP - 6789

ER -