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首页> 外文期刊>International journal of environmental analytical chemistry >Determination of acid volatile sulphur in river sediments by ICP-OES coupled with purge and trap method
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Determination of acid volatile sulphur in river sediments by ICP-OES coupled with purge and trap method

机译：吹扫捕集-ICP-OES法测定河流沉积物中酸挥发性硫

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摘要

The developed and tested method is based on the acid volatile sulphur ( AVS) releasing from a sample of sediment by acidification with hydrochloric acid and sequential absorption of released hydrogen sulphide into the absorption solution of sodium hydroxide. Total sulphur absorbed in the absorption solution is subsequently determined by inductively coupled plasma optical emission spectrometry ( ICP-OES) technique. The method was tested using both model and real samples of the river sediment. Obtained results were compared with the results of iodometric determination as the method routinely used for the AVS determination. In case of using ICP-OES with purge and trap, there is no spectral interference of calcium; therefore for the determination of sulphur, it is possible to use atomic emission line of sulphur S I 180.7 nm. The tested method provides the results comparable with the iodometric method within the range of tested concentrations. The detection limit ( LOD) of this method is 0.09 mg S2- L-1 in the absorption solution which corresponds to 0.23 mg S2- kg(-1) in a sediment. Value of LOD is comparable with the iodometric determination.
机译：开发和测试的方法基于通过用盐酸酸化从沉积物样品中释放出的酸挥发性硫（AVS），并将释放出的硫化氢依次吸收到氢氧化钠吸收溶液中。随后，通过电感耦合等离子体发射光谱（ICP-OES）技术确定吸收溶液中吸收的总硫。该方法已使用模型和实际河流沉积物样本进行了测试。将获得的结果与常规用于AVS测定的碘量测定法的结果进行比较。如果将ICP-OES与吹扫捕集一起使用，则不会产生钙的光谱干扰。因此，对于硫的测定，可以使用S 1 180.7 nm的原子发射谱线。在测试浓度范围内，测试方法可提供与碘量法可比的结果。该方法的检出限（LOD）在吸收溶液中为0.09 mg S2- L-1，相当于沉积物中的0.23 mg S2- kg（-1）。 LOD的值可与碘量法测定相媲美。

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