title: Examination of correlation between histidine and nickel absorption by Morus L., Robinia pseudoacacia L. and Populus nigra L. using HPLC-MS and ICP-MS.
abstract: In this study, HPLC-MS and ICP-MS methods were used for the determination of histidine and nickel in Morus L., Robinia pseudoacacia L., and Populus nigra L. leaves taken from industrial areas including Gaziantep and Bursa cities. In the determination of histidine by HPLC-MS, all of the system parameters such as flow rate of mobile phase, fragmentor potential, injection volume and column temperature were optimized and found to be 0.2 mL min(-1), 70 V, 15 µL, and 20°C, respectively. Under the optimum conditions, histidine was extracted from plant sample by distilled water at 90°C for 30 min. Concentrations of histidine as mg kg(-1) were found to be between 2-9 for Morus L., 6-13 for Robinia pseudoacacia L., and 2-10 for Populus nigra L. Concentrations of nickel were in the ranges of 5-10 mg kg(-1) for Morus L., 3-10 mg kg(-1) for Robinia pseudoacacia L., and 0.6-4 mg kg(-1) for Populus nigra L. A significant linear correlation (r = 0.78) between histidine and Ni was observed for Populus nigra L., whereas insignificant linear correlation for Robinia pseudoacacia L. (r = 0.22) were seen. Limits of detection (LOD) and quantitation (LOQ) were found to be 0.025 mg Ni L(-1) and 0.075 mg Ni L(-1), respectively.
authors.affiliation: a Department of Chemistry, Faculty of Science, Firat University , Elazig , Turkey.
authors.forename: Sukran Akkus
authors.initials: SA
authors.lastname: Ozen
authors.affiliation: a Department of Chemistry, Faculty of Science, Firat University , Elazig , Turkey.
authors.forename: Mehmet
authors.initials: M
authors.lastname: Yaman
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004784:Environmental Monitoring / Q000379:methods; D004785:Environmental Pollutants / Q000378:metabolism*; D006639:Histidine / Q000378:metabolism*; D007221:Industry; D013058:Mass Spectrometry / Q000379:methods; D031625:Morus / Q000378:metabolism*; D009532:Nickel / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism; D032107:Populus / Q000378:metabolism*; D031301:Robinia / Q000378:metabolism*
chemical_list: D004785:Environmental Pollutants; D006639:Histidine; D009532:Nickel
keywords: HPLC-MS; ICP-MS; histidine; hyperaccumulator plants; nickel