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A spectrophotometric determination of the amino group content in chitosan

机译:壳聚糖中氨基含量的分光光度法测定

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A spectrophotometric method for the determination of amino group content in chitosan based on the use of the tropaeolin OOO-1 anionic dye was developed. The electronic spectra of chitosan-dye solutions in 1 percent acetic acid in the visible light area indicated that complexes between the dye and the protonated amino groups of chitosan in the ratio 1:1 were formed, which resulted in a decrease in the dye absorption maximum at 483 nm. The linear dependence of this decrease on the molar concentration of the amino group for seven chitosan samples with a known degree of N-acetylation was used for calibration. The amino group content in chitosan samples can precisely determined by our method and their N-acetylation degree can thus calculated.
机译:基于使用Tropaeolin OOO-1阴离子染料的壳聚糖在壳聚糖中测定氨基含量的分光光度法。 在可见光区域中1%乙酸中的壳聚糖染料溶液的电子光谱表明,形成染料与壳聚糖的质子化氨基之间的复合物,形成为1:1的壳聚糖,导致染料吸收最大值降低 在483纳米。 使用已知的N-乙酰化的七种壳聚糖样品的氨基摩尔浓度降低的线性依赖性用于校准。 壳聚糖样品中的氨基含量可以精确地通过我们的方法确定,因此可以计算它们的N-乙酰化度。

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