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首页> 外文期刊>Fuel >Determination of copper, iron, nickel and zinc in gasoline by FAAS after sorption and preconcentration on silica modified with 2-aminotiazole groups
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Determination of copper, iron, nickel and zinc in gasoline by FAAS after sorption and preconcentration on silica modified with 2-aminotiazole groups

机译：用2-氨基噻唑基改性的二氧化硅吸附和预浓缩后，用火焰原子吸收光谱法测定汽油中的铜，铁，镍和锌

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摘要

Silica gel chemically modified with 2-aminotiazole groups (SLAT), was used for preconcentration of cupper, zinc, nickel and iron from gasoline, normally used as a engine fuel. Surface characteristics and surface area of the silica gel were obtained before and after chemical modification using FT-IR, Kjeldhal and surface area analysis (B.E.T.). The retention and recovery of the analyte elements were studied by applying batch and column techniques. The experimental parameters, such as shaking time in batch technique, flow rate and concentration of the eluent (HC1-0.25-2.00 mol 1~(-1) and the amount of silica, on retention and elution, have been investigated. Detection limits of the method for cupper, iron, nickel and zinc are 0.8, 3, 2 and 0.1 mu g 1~(-1), respectively. The sorption-desorption of the studied metal ions made possible the development of a preconcentration method for metal ions at trace level in gasoline using flame AAS for their quantification.
机译：用2-氨基噻唑基（SLAT）化学改性的硅胶用于从汽油（通常用作发动机燃料）中预浓缩铜，锌，镍和铁。使用FT-IR，Kjeldhal和表面积分析（B.E.T.）在进行化学修饰之前和之后获得硅胶的表面特性和表面积。通过应用分批和色谱柱技术研究了分析物元素的保留和回收率。研究了分批摇动时间，洗脱液的流速和浓度（HC1-0.25-2.00 mol 1〜（-1）以及二氧化硅的量）对保留和洗脱的实验参数。铜，铁，镍和锌的含量分别为0.8、3、2和0.1μg1〜（-1），所研究的金属离子的吸附-解吸使得开发一种在30℃时进行金属离子预富集的方法成为可能。火焰原子吸收光谱法测定汽油中的痕量水平

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