Polydopamine-assisted partial hydrolyzed poly(2-methyl-2-oxazolinze) as coating for determination of melamine in milk by capillary electrophoresis

Talanta
Yalin ZhangYanmei Wang

Abstract

Nitrogen-rich melamine (66% by mass) had been found to be illegally adulterated to milk products and animal feed in order to increase the apparent protein content, and ingestion of melamine may lead to the formation of kidney stones. Hence, the development of reliable analytical methods for the monitoring of melamine in milk products is necessary. The common methods for melamine analysis in milk products are performed via GC-MS or HPLC, however, these procedures require a large of organic solvent and several pretreatment steps. In this study, a new and facile approach was developed to modify a fused-silica capillary inner surface based on poly(dopamine) (PDA) and partial hydrolyzed poly(2-methyl-2-oxazoline) (PMOXA-EI) mixed coating, which was used to determine the melamine in milk powder quantitatively by capillary electrophoresis with ultraviolet (CE-UV) detection with simple analytes pretreatment. Firstly, the influences of the molecular mass of poly(2-methyl-2-oxazoline) (PMOXA), the hydrolysis degree of PMOXA, and the concentration ratio of DA to PMOXA-EI on the separation properties of a mixture of four basic proteins (cytochrome c, lysozyme, ribonuclease A, and α-chymotrypsinogen A) were studied in detail. As a consequen...Continue Reading

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Citations

Sep 7, 2016·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Lijiao LiangChengzhi Huang
Aug 23, 2018·Journal of Separation Science·Hao Zhang, Feng-Qing Yang
Mar 14, 2019·Analytical and Bioanalytical Chemistry·Ruifang SuChunyan Sun
Aug 10, 2017·Electrophoresis·María Ramos-PayánMiguel Ángel Bello-López

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