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首页> 外文期刊>RSC Advances >Development of polyacrylamide chromium oxide as a new sorbent for solid phase extraction of As(III) from food and environmental water samples
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Development of polyacrylamide chromium oxide as a new sorbent for solid phase extraction of As(III) from food and environmental water samples

机译：开发聚丙烯酰胺三氧化二铬作为新型吸附剂，用于从食品和环境水样品中固相萃取As（III）

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A new hybrid polyacrylamide chromium oxide (PACO) was synthesized and characterized by elemental analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled with EDX, transmission electron microscopy (TEM), thermal and infrared spectral studies. The application of PACO as a solid phase extraction sorbent in environmental analysis is reported for the first time using arsenic as a model target. The sorption of As(III) onto PACO has been studied through batch and column techniques. The adsorption equilibrium data were analyzed by Langmuir and Freundlich isotherm models. The experimental data obeyed the pseudo second order kinetic model. The effects of adsorption and desorption conditions for arsenic(III) including initial pH of the sample, solution volume and flow rate of the sample solution, eluent and its flow rate were investigated and optimized prior to its determination by spectrophotometry and inductively coupled plasma-atomic emission spectrometry (ICP-AES). As(III) can be quantitatively retained on PACO over the pH range 6.5-7.5 from sample volume up to 500 mL and then eluted completely with 5 mL of 0.5 M HNO3 + NaNO3. Under the optimal conditions, the enrichment factor was 100. The RSD values for day to day and column to column precision were found to be 3.91% and 4.55% respectively, at a 6 mu g L-1 As(III) level. The recoveries of arsenic in the environmental water samples were above 95% with 500 mL water samples. The proposed method has been applied successfully to the analysis of total inorganic arsenic in water samples, basmati rice and tobacco cigarettes.
机译：合成了一种新的杂化聚丙烯酰胺氧化铬（PACO），并通过元素分析，X射线衍射（XRD），扫描电子显微镜（SEM）和EDX，透射电子显微镜（TEM），热和红外光谱研究对其进行了表征。首次报道了以砷为模型目标的PACO在环境分析中作为固相萃取吸附剂的应用。通过间歇和柱技术研究了As（III）在PACO上的吸附。用Langmuir和Freundlich等温模型分析吸附平衡数据。实验数据服从伪二级动力学模型。在分光光度法和电感耦合等离子体原子法测定之前，研究并优化了砷（III）的吸附和解吸条件对样品初始pH，溶液体积和样品溶液流速，洗脱液及其流速的影响。发射光谱法（ICP-AES）。 As（III）可以在pH范围从6.5到7.5的PACO中定量保留到500 mL，然后用5 mL的0.5 M HNO3 + NaNO3完全洗脱。在最佳条件下，富集系数为100。在6μg L-1 As（III）水平下，每日和柱对柱精密度的RSD值分别为3.91％和4.55％。使用500 mL水样时，环境水样中的砷回收率均超过95％。该方法已成功应用于水样，印度香米和卷烟中总无机砷的分析。

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