基于超分子自组装策略定性和定量检测奶粉中的三聚氰胺

doi:10.3866/PKU.DXHX202111071

Abstract

Abstract:

Melamine is a widely used industrial raw material that forms stones after ingestion, causing great damage to the kidneys. Because of its high nitrogen content, melamine is often illegally added to milk powder to improve the nitrogen content. Therefore, the qualitative and quantitative detection of melamine in the food industry is critical. This study was based on the supramolecular self-assembly strategy; cyanuric acid was selected as the detection reagent to form the supramolecular structure with melamine, and methylene blue was used as an indicator through the interaction of melamine and cyanuric acid. The melamine in milk powder was quantitatively detected by an ultraviolet spectrophotometer. The reaction conditions of this experiment were mild, the color change was clear, the detection limit was low, and the sensitivity was high. The experiment can be divided into many experimental units and is a novel experiment, thus making it suitable for the undergraduate teaching.

Key words: Melamine, Supramolecular self-assembly, Absorbance, Indicator

Shuangshuang Cha, Jinpen Niu, Chuanfeng Liu, Jie Yan, Min Zhu, Wen Zhang, Mingyou Hu. Qualitative and Quantitative Determination of Melamine in Milk Powder Based on Supramolecular Self-Assembly Strategy[J].University Chemistry, 2022, 37(5): 2111071.

Figures/Tables 18

References 18

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试剂	分子式	CAS号	纯度	厂家
三聚氰胺	C₃H₆N₆	108-78-1	分析纯	天津市科密欧化学试剂有限公司
氰尿酸	C₃H₃N₃O₃	108-80-5	分析纯	天津市科密欧化学试剂有限公司
亚甲基蓝	C₁₆H₁₈N₃SCl·3H₂O	12262-49-6	分析纯	福晨(天津)化学试剂有限公司
雀巢高钙营养奶粉	–	–	–	双城雀巢有限公司(商品编号：2490315)
溴化钾	KBr	7758-02-3	光谱纯	上海阿拉丁生化科技股份有限公司

仪器名称	型号	厂家
红外光谱仪	TENSOR 27	德国布鲁克
扫描电镜	GeminiSEM 500	德国蔡司
高效液相色谱仪	LC20A	日本岛津
紫外可见分光光度计	721	上海菁华
超声波清洗机	CR-020S	深圳春霖
离心机	TDL-80-2E	上海安亭科学仪器厂
分析天平	Mettler-Toledo AL 104	梅特勒-托利多公司
真空干燥箱	DZF-6020	巩义市宏华仪器有限公司
滤膜	0.45 μm	上海必泰生物科技有限公司

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Qualitative and Quantitative Determination of Melamine in Milk Powder Based on Supramolecular Self-Assembly Strategy

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