title: Rapid analysis of malachite green and leucomalachite green in fish muscles with surface-enhanced resonance Raman scattering.
abstract: Surface-enhanced resonance Raman scattering (SERRS) coupled with gold nanospheres was applied for rapid analysis of the hazardous substances malachite green (MG) and leucomalachite green (LMG) in fish muscle tissues. The lowest concentration of MG that could be detected was 0.5ngmL(-1) with high linear correlation (R(2)=0.970-0.998) between MG concentration and intensities of characteristic Raman peaks. A simplified sample preparation method taking less than 1h for recovering MG and LMG in fish fillets was developed for SERRS analysis, and 4-8 samples could be handled in parallel. MG and LMG could be detected in extracts of tilapia fish fillets at as low as 2ngg(-1) with SERRS and a simple principle component analysis method. For six other fish species, the lowest detectable concentration of MG ranged from 1ngg(-1) to 10ngg(-1). This study provides a new sensitive approach for the detection of trace amounts of the prohibited drugs MG and LMG in muscle food, which has the potential for rapidly screening a large number of samples.
authors.affiliation: College of Food Science and Technology, Shanghai Ocean University, No. 999 Hucheng Huan Road, LinGang New City, Shanghai 201306, China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Food Science and Technology, Shanghai Ocean University, No. 999 Hucheng Huan Road, LinGang New City, Shanghai 201306, China.
authors.forename: Wansong
authors.initials: W
authors.lastname: Yu
authors.affiliation: College of Food Science and Technology, Shanghai Ocean University, No. 999 Hucheng Huan Road, LinGang New City, Shanghai 201306, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Pei
authors.affiliation: College of Food Science and Technology, Shanghai Ocean University, No. 999 Hucheng Huan Road, LinGang New City, Shanghai 201306, China.
authors.forename: Keqiang
authors.initials: K
authors.lastname: Lai
authors.affiliation: School of Food Science, Washington State University, Pullman, WA 99164-6376, USA.
authors.forename: Barbara A
authors.initials: BA
authors.lastname: Rasco
authors.affiliation: College of Food Science and Technology, Shanghai Ocean University, No. 999 Hucheng Huan Road, LinGang New City, Shanghai 201306, China; School of Food Science, Washington State University, Pullman, WA 99164-6376, USA. Electronic address: yiqunh@hotmail.com.
authors.forename: Yiqun
authors.initials: Y
authors.lastname: Huang
mesh_terms: D000818:Animals; D005396:Fish Products / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis*; D009132:Muscles / Q000737:chemistry*; D012394:Rosaniline Dyes / Q000032:analysis*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D017210:Tilapia
chemical_list: D012394:Rosaniline Dyes; C005095:malachite green; C015320:leucomalachite green
keywords: Leucomalachite green; Malachite green; Nanoparticle; Rapid analysis; SERRS