title: Development of a Matrix Solid Phase Dispersion methodology for the determination of triazine herbicides in mussels.
abstract: A method based on Matrix Solid Phase Dispersion (MSPD) for determination of nine triazines in mussels has been optimised in terms of the sorbents used for extracting and cleaning-up. Two dispersing agents: C18 and florisil, and eight cleanup co-sorbents: florisil, silica, silica/alumina, Envi™ Carb, Envi-Carb-II/PSA, SAX/PSA, Envi-Carb-II /SAX/PSA and C18 were assayed. Analytes were eluted using 20 mL of ethyl acetate and 5 mL of acetonitrile and finally the extract was concentrated to dryness, re-constituted with 1 mL methanol and determined by HPLC-DAD. The best results were obtained with C18 as dispersing agent and Envi-Carb-II/SAX/PSA as clean-up co-column. Recoveries ranged between 79% and 99% and repeatability and reproducibility were below than 16% for all compounds. The linearity of the calibration curves yielded the R(2)⩾0.9993. The LOQ values ranged from 0.10 to 0.18 mg kg(-1) dried sample. Finally the method was applied to the analysis of mussel samples from Galicia (NW Spain).
authors.affiliation: Grupo Química Analítica Aplicada, Instituto Universitario de Medio Ambiente, Departamento de Química Analítica, Facultade de Ciencias, Universidade da Coruña, Campus de A Coruña, 15071 A Coruña, Spain.
authors.forename: N
authors.initials: N
authors.lastname: Rodríguez-González
authors.affiliation: Grupo Química Analítica Aplicada, Instituto Universitario de Medio Ambiente, Departamento de Química Analítica, Facultade de Ciencias, Universidade da Coruña, Campus de A Coruña, 15071 A Coruña, Spain. Electronic address: mjgc@udc.es.
authors.forename: M J
authors.initials: MJ
authors.lastname: González-Castro
authors.affiliation: Grupo Química Analítica Aplicada, Instituto Universitario de Medio Ambiente, Departamento de Química Analítica, Facultade de Ciencias, Universidade da Coruña, Campus de A Coruña, 15071 A Coruña, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Beceiro-González
authors.affiliation: Grupo Química Analítica Aplicada, Instituto Universitario de Medio Ambiente, Departamento de Química Analítica, Facultade de Ciencias, Universidade da Coruña, Campus de A Coruña, 15071 A Coruña, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Muniategui-Lorenzo
mesh_terms: D000818:Animals; D049872:Bivalvia / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D005506:Food Contamination / Q000032:analysis; D006540:Herbicides / Q000032:analysis / Q000302:isolation & purification*; D015203:Reproducibility of Results; D012758:Shellfish / Q000032:analysis*; D052616:Solid Phase Extraction / Q000379:methods*; D013030:Spain; D014227:Triazines / Q000032:analysis / Q000302:isolation & purification*
chemical_list: D006540:Herbicides; D014227:Triazines
keywords: Ametryn (PubChem CID: 13263); Atrazine (PubChem CID: 2256); Cyanazine (PubChem CID: 30773); Diode array detection; High performance liquid chromatography; Matrix Solid Phase Dispersion; Mussel; Prometryn (PubChem CID: 4929); Propazine (PubChem CID: 4937); Simazine (PubChem CID: 5216); Simetryn (PubChem CID: 13905); Terbuthylazine (PubChem CID: 22206); Terbutryn (PubChem CID: 13450); Triazines