微波法制备乳酸碳量子点及荧光猝灭法测定对硝基苯胺

doi:10.3969/j.issn.1001-1803.2022.06.016

摘要/Abstract

摘要：

以乳酸为碳前驱体,聚乙二醇为表面修饰剂,经一步微波法制备了碳量子点（CDs）,并用透射电子显微镜、荧光及紫外初步考察了该量子点的结构与性质。研究了12种物质分子对量子点荧光猝灭效应,建立了对硝基苯胺猝灭CDs荧光分析新方法,浓度范围在6×10^-6~1×10^-4 mol/L范围内呈良好线性关系,检出限为8.76×10^-6 mol/L。应用于染发膏中对硝基苯胺的检测,3种染发膏中均含有对硝基苯胺,分别为栗棕89.7 mg/g,枣红129.2 mg/g,亚麻44.4 mg/g。

关键词: 微波, 碳量子点, 对硝基苯胺, 染发膏

Abstract:

Carbon quantum dots （CDs） were prepared by one-step microwave method using lactic acid as carbon precursor and polyethylene glycol as a surface modifier. The structure and properties of the CDs were investigated by transmission electron microscopy, fluorescence and ultraviolet. The fluorescence quenching effect of 12 kinds of molecules to the quantum dots was studied. A new method for fluorescence analysis of p-nitroaniline quenching CDs is established. The linear relationship is good in the concentration range of 6×10^-6-1×10^-4 mol/L, and the limit of detection is 8.76×10^-6 mol/L. The test for p-nitroaniline in hair dye pastes reveals that p-nitroaniline is contained in the three hair dyeing creams, which are 89.7 mg/g in chestnut brown, 129.2 mg/g in purplish red and 44.4 mg/g in flaxen.

Key words: microwave, carbon quantum dot, p-nitroaniline, hair cream

中图分类号:

O657.3

魏增云. 微波法制备乳酸碳量子点及荧光猝灭法测定对硝基苯胺[J]. 日用化学工业, 2022, 52(6): 683-688.

Wei Zengyun. Microwave-assisted preparation of lactic acid carbon quantum dots and determination of p-nitroaniline with fluorescence quenching[J]. China Surfactant Detergent & Cosmetics, 2022, 52(6): 683-688.

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样品	样品含量/（mol/L）	加入量/（mol/L）	测量值（n=5）/（mol/L）	回收率（n=5）/%	RSD/%
栗棕染发膏	1.299×10^-5	1.25×10^-5	2.506×10^-5	96.5	1.21
	1.299×10^-5	2.5×10^-5	3.895×10^-5	103.8	1.20
	1.299×10^-5	5×10^-5	5.930×10^-5	92.1	1.01
枣红染发膏	3.742×10^-5	1×10^-5	4.681×10^-5	93.9	1.27
	3.742×10^-5	2×10^-5	5.826×10^-5	104.2	2.36
	3.742×10^-5	4×10^-5	7.758×10^-5	100.4	1.68
亚麻染发膏	2.571×10^-5	5×10^-6	3.035×10^-5	92.8	2.91
	2.571×10^-5	1×10^-5	3.542×10^-5	97.1	1.26
	2.571×10^-5	2×10^-5	4.469×10^-5	94.9	2.68

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