Kamaruddin Amirah Farhan, Sanagi Mohd Marsin, Wan Ibrahim Wan Aini, Md Shukri Dyia S, Abdul Keyon Aemi S
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Johor, Malaysia.
Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, Johor Bahru, Johor, Malaysia.
J Sep Sci. 2017 Nov;40(21):4256-4263. doi: 10.1002/jssc.201700659. Epub 2017 Sep 22.
Polypyrrole-magnetite dispersive micro-solid-phase extraction method combined with ultraviolet-visible spectrophotometry was developed for the determination of selected cationic dyes in textile wastewater. Polypyrrole-magnetite was used as adsorbent due to its thermal stability, magnetic properties, and ability to adsorb Rhodamine 6G and crystal violet. Dispersive micro-solid-phase extraction parameters were optimized, including sample pH, adsorbent amount, extraction time, and desorption solvent. The optimum polypyrrole-magnetite dispersive micro-solid phase-extraction conditions were sample pH 8, 60 mg polypyrrole-magnetite adsorbent, 5 min of extraction time, and acetonitrile as the desorption solvent. Under the optimized conditions, the polypyrrole-magnetite dispersive micro-solid-phase extraction with ultraviolet-visible method showed good linearity in the range of 0.05-7 mg/L (R > 0.9980). The method also showed a good limit of detection for the dyes (0.05 mg/L) and good analyte recoveries (97.4-111.3%) with relative standard deviations < 10%. The method was successfully applied to the analysis of dyes in textile wastewater samples where the concentration found was 1.03 mg (RSD ±7.9%) and 1.13 mg/L (RSD ± 4.6%) for Rhodamine 6G and crystal violet, respectively. It can be concluded that this method can be adopted for the rapid extraction and determination of dyes at trace concentration levels.
开发了聚吡咯 - 磁铁矿分散微固相萃取法结合紫外 - 可见分光光度法用于测定纺织废水中选定的阳离子染料。聚吡咯 - 磁铁矿因其热稳定性、磁性以及吸附罗丹明6G和结晶紫的能力而被用作吸附剂。对分散微固相萃取参数进行了优化，包括样品pH值、吸附剂用量、萃取时间和解吸溶剂。聚吡咯 - 磁铁矿分散微固相萃取的最佳条件为样品pH值8、60mg聚吡咯 - 磁铁矿吸附剂、5min萃取时间以及乙腈作为解吸溶剂。在优化条件下，聚吡咯 - 磁铁矿分散微固相萃取结合紫外 - 可见分光光度法在0.05 - 7mg/L范围内具有良好的线性（R>0.9980）。该方法对染料还具有良好的检测限（0.05mg/L）和良好的分析物回收率（97.4 - 111.3%），相对标准偏差<10%。该方法成功应用于纺织废水样品中染料的分析，其中罗丹明6G和结晶紫的浓度分别为1.03mg（RSD±7.9%）和1.13mg/L（RSD±4.6%）。可以得出结论，该方法可用于痕量浓度水平染料的快速萃取和测定。
