化学改性巴旦木壳对苋菜红的富集与检测

发布时间：2018-06-28 11:12

本文选题：十六烷基三甲基溴化铵 + 化学改性巴旦木壳　；参考：《新疆农业大学学报》2017年03期

【摘要】：采用十六烷基三甲基溴化铵在超声条件下制备了化学改性巴旦木壳,将其用作吸附剂对苋菜红的吸附进行研究;并将吸附预富集与近红外漫反射光谱相结合,建立了一种快速测定稀溶液中苋菜红的分析方法。在吸附试验中,分析了pH值和吸附时间对苋菜红吸附率的影响;富集了苋菜红的吸附剂,无需脱附,经近红外漫反射光谱直接检测,并以偏最小二乘回归建立定量模型进行苋菜红的定量预测。结果表明,在中性、弱酸性条件下,常温10min振荡吸附,吸附率达到94%以上;近红外分析结果显示,苋菜红的参考浓度和预测浓度之间的相关系数为0.9413,苋菜红在0.4~16.0mg/L的较低浓度范围内,苋菜红预测样本的回收率可以达到86.5%~115.1%。由于化学改性巴旦木壳制备简单,对苋菜红有良好的吸附能力,可将吸附预富集与近红外漫反射光谱技术相结合用于稀溶液中微量苋菜红的富集与灵敏检测。
[Abstract]:The chemically modified almond shell was prepared by using cetyltrimethylammonium bromide under ultrasonic condition, which was used as an adsorbent to study the adsorption of amaranth, and the adsorption preconcentration was combined with near infrared diffuse reflectance spectroscopy. A rapid method for the determination of amaranth in dilute solution was established. In the adsorption experiment, the effects of pH value and adsorption time on the adsorption rate of amaranth were analyzed, and the adsorbent of amaranth was enriched without desorption. The quantitative model of amaranth was established by partial least square regression. The results show that under neutral and weak acid conditions, the adsorption rate of 10min oscillating at room temperature is over 94%, and the near infrared analysis shows that, The correlation coefficient between the reference concentration of amaranth and the predicted concentration was 0.9413, and the recovery rate of amaranth could reach 86.5% 115.1% in the lower concentration range of 0.4 ~ 16.0 mg / L of amaranth. Because of the simple preparation of chemically modified almond shell and the good adsorption ability of amaranth, the preconcentration of amaranth can be combined with near infrared diffuse reflectance spectroscopy for the enrichment and sensitive detection of trace amaranth in dilute solution.
【作者单位】：新疆特色药食用植物资源化学实验室喀什大学化学与环境科学学院;
【基金】：喀什大学高层次人才项目(GCC16ZK-004)
【分类号】：O652;TQ424

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