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首页> 外文期刊>Turkish journal of chemistry >Online coupling electrochemical preconcentration and GFAAS technique as effective method for determination of ultratrace concentrations of antimony in groundwater and surface water samples
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Online coupling electrochemical preconcentration and GFAAS technique as effective method for determination of ultratrace concentrations of antimony in groundwater and surface water samples

机译：在线耦合电化学预富集和GFAAS技术是测定地下水和地表水样品中超痕量锑的有效方法

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摘要

The present article describes a method of determination of low antimony concentrations using a graphite furnace AAS technique after electrochemical preconcentration. A 2-electrode flow-through cell was developed with a working electrode made of gold-coated porous carbon and an accessory Pt electrode. This cell worked in online coupling with the graphite furnace atomizer. Accumulation occurred from the 6 M hydrochloric acid solution and 2 M nitric acid was used to dissolve and transport antimony into the sampling loop. The sampling loop was placed on a 6-way valve. The preconcentrated solution was transported to the atomizer using an air jet. The detection limit (3$sigma )$ was 0.02 $mu $g/L and the overall linear range was 0.05-10 $mu $g/L. The method could be used only to determine the concentration of total inorganic antimony. The method was validated through analysis of certified reference materials and various water samples. Good agreement with the reference values was observed in all cases.
机译：本文介绍了一种在电化学预浓缩后使用石墨炉AAS技术测定低锑浓度的方法。开发了一个两电极流通池，其工作电极由镀金的多孔碳制成，并带有辅助的Pt电极。该单元与石墨炉雾化器在线耦合。从6 M盐酸溶液中发生积累，并使用2 M硝酸将锑溶解并将其运输到采样环中。采样环放置在六通阀上。使用空气喷嘴将预浓缩的溶液输送至雾化器。检出限（3 $ sigma）$为0.02 $ mu $ g / L，总线性范围为0.05-10 $ mu $ g / L。该方法仅可用于确定总无机锑的浓度。该方法通过分析认证的参考物质和各种水样进行了验证。在所有情况下均观察到与参考值的良好一致性。

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