SERS-active gold nanoflower combined with a portable Raman spectrometer for rapid detection of melamine

• Main Authors: WU Yiping, XU Qin, MA Jun, YANG Haifeng
• Format: Article
• Language: English
• Published: Academic Journals Center of Shanghai Normal University 2016-12-01
• Series: Journal of Shanghai Normal University (Natural Sciences)
• Subjects: gold nanoflower; surface-enhanced Raman spectroscopy; melamine
• Online Access: http://qktg.shnu.edu.cn/zrb/shsfqkszrb/ch/reader/create_pdf.aspx?file_no=201606010&flag=1&year_id=2016&quarter_id=6

A simple,rapid,sensitive determination method based on surface enhanced Raman scattering effect of gold nanoflowers for melaminewas developed.The gold nanoflowers with the highest enhancement factor (EF) value for rhodamine 6G weresynthesized with 5 μL ascorbic acid and 1 000 μL hydroxylamine hydrochlorideunder mild condition without any surfactants as template.The characteristic Raman peak of melamine is at 679 cm^-1.It was found that the Raman intensity of the characteristic peak increased with the increase of melamine concentration.Hence,the qualitative and quantitative detection for melaminecould be achieved.The linear range of melamine detection was 5~100 μmol/L with the standard deviation <i>R</i>²=0.9875.The limit of detection (LOD) reached 1 μmol/L,which is much lower than that in the National dairy products standard (19.8 μmol/L).