用于固相萃取水中、婴儿食品、茶和咖啡样品中铅和铜的聚羟基丁酸酯-聚乙二醇嵌段共聚物。
Polyhydroxybutyrate-b-polyethyleneglycol block copolymer for the solid phase extraction of lead and copper in water, baby foods, tea and coffee samples.
机构信息
Gaziosmanpasa University, Faculty of Science and Arts, Chemistry Department, 60250 Tokat, Turkey; National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
Gaziosmanpasa University, Faculty of Science and Arts, Chemistry Department, 60250 Tokat, Turkey.
出版信息
Food Chem. 2014;152:75-80. doi: 10.1016/j.foodchem.2013.11.133. Epub 2013 Nov 28.
A new adsorbent, polyhydroxybutyrate-b-polyethyleneglycol, was used for the separation and preconcentration of copper(II) and lead(II) ions prior to their flame atomic absorption spectrometric detections. The influences of parameters such as pH, amount of adsorbent, flow rates and sample volumes were investigated. The polymer does not interact with alkaline, alkaline-earth metals and transition metals. The enrichment factor was 50. The detection limits were 0.32 μg L(-1) and 1.82 μg L(-1) for copper and lead, respectively. The recovery values were found >95%. The relative standard deviations were found to be less than 6%. The validation of the procedure was performed by analysing certified reference materials; NIST SRM 1515 Apple leaves, IAEA-336 Lichen and GBW-07605 Tea. The method was successfully applied for the analysis of analytes in water and food samples.
一种新型吸附剂，聚羟基丁酸酯-聚乙二醇，被用于分离和预浓缩铜（II）和铅（II）离子，然后进行火焰原子吸收光谱法检测。研究了 pH 值、吸附剂用量、流速和样品体积等参数的影响。该聚合物不与碱土金属和过渡金属相互作用。富集因子为 50。铜和铅的检测限分别为 0.32 μg/L 和 1.82 μg/L。回收率均大于 95%。相对标准偏差小于 6%。通过分析认证参考物质；NIST SRM 1515 苹果叶、IAEA-336 地衣和 GBW-07605 茶叶对该方法进行了验证。该方法成功地应用于水样和食品样品中分析物的分析。
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