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以三氨基三羰基铬与对二甲氨基苯甲醛缩巴比妥酸为原料,合成了一种新型高灵敏度检测三聚氰胺的红外化学传感器分子——对二甲氨基苯甲醛缩巴比妥酸三羰基铬。通过元素分析、质谱、核磁共振及红外光谱对其结构进行了表征。红外吸收光谱研究表明,在乙醇溶剂中,当三聚氰胺的浓度高于1.0×10~(-7) mol/L时,金属羰基的红外吸收峰与三聚氰胺的浓度呈线性关系。利用该红外化学传感器分子可初步实现对三聚氰胺的微量检测,检测误差低于5%。
A new type of high-sensitivity infrared chemical sensor for the detection of melamine, p-dimethylaminobenzaldehyde-reduced barbituric acid tricarbonyl, was synthesized from triamino tricarbonyl chromium and p-dimethylaminobenzaldehyde barbiturate chromium. Its structure was characterized by elemental analysis, mass spectrometry, nuclear magnetic resonance and infrared spectroscopy. Infrared absorption spectroscopy showed that when the concentration of melamine in ethanol solvent is higher than 1.0 × 10 -7 mol / L, the infrared absorption peak of metal carbonyl has a linear relationship with the concentration of melamine. The infrared chemical sensor molecule can be used for the preliminary detection of melamine, the detection error is less than 5%.