Surface enhanced Raman spectroscopic detection of polycyclic aromatic hydrocarbons (PAHs) using a gold nanoparticles-modified alginate gel network.
This work aims at the development of a fast scanning method for organic pollutants with low-cost small Raman spectrometers. A gold nanoparticles-embedded alginate gel is prepared and applied as the substrate for surface enhanced Raman spectrometric detection of polycyclic aromatic hydrocarbons (PAHs). The target molecules are captured by the three-dimensional network of the alginate gel, and brought close to the hot spots generated by gold nanoparticles embedded in the gel. Significant Raman enhancement effects are observed in the analysis of four typical PAH compounds including pyrene, anthracene, fluorene and benzo(a)pyrene. Quantitative analysis of BaP shows a limit of detection of 0.365 nM using a low-cost small Raman spectrometer, which is comparable to published values. The practicability of the method is tested by analyzing PAHs in different water samples, offering a fast scanning method for PAHs.
State Key Laboratory of Chemo/Biosensing and Chemometrics, Department of Chemistry, Hunan University, Changsha 410082, China.
Le
L
Bao
Pengtao
P
Sheng
Jie
J
Li
Shangyuan
S
Wu
Qingyun
Q
Cai
Shouzhuo
S
Yao
D000464:Alginates / Q000737:chemistry*; D000873:Anthracenes / Q000032:analysis; D001564:Benzo(a)pyrene / Q000032:analysis; D005449:Fluorenes / Q000032:analysis; D005782:Gels / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D006603:Hexuronic Acids / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D011721:Pyrenes / Q000032:analysis; D013059:Spectrum Analysis, Raman; D014874:Water Pollutants, Chemical / Q000032:analysis
D000464:Alginates; D000873:Anthracenes; D005449:Fluorenes; D005782:Gels; D006603:Hexuronic Acids; D011084:Polycyclic Aromatic Hydrocarbons; D011721:Pyrenes; D014874:Water Pollutants, Chemical; D001564:Benzo(a)pyrene; C041509:fluorene; D006046:Gold; D020723:Glucuronic Acid; C030984:pyrene; C034020:anthracene