Center for Research in Sustainable Chemistry-CIQSO, University of Huelva, 21071 Huelva, Spain.
Department of Chemistry, Faculty of Experimental Sciences, University of Huelva, 21071 Huelva, Spain.
Food Chem. 2020 Jun 15;315:126215. doi: 10.1016/j.foodchem.2020.126215. Epub 2020 Jan 23.
The accumulation and transformation of arsenic species have been studied in the context of hydroponic cultivation of strawberry plants. Cultivation experiments have been performed by adding inorganic arsenic at concentrations of 10, 100 and 1000 µg L via root irrigation. The total arsenic content was determined by Hydride Generation-Atomic Fluorescence Spectrometry (HG-AFS). The accumulation was dependent on the concentration of arsenic added to the irrigation and the arsenic species. Arsenic (III) accumulated at higher rates than arsenic (V). A greater accumulation of arsenic was found in roots (0.44-4.10 mg kg) than in stems (0.43-1.27 mg kg) and fruits (0.22-0.30 mg kg). The speciation results obtained by HPLC-HG-AFS analysis indicated that the addition of As(III) resulted in a partial methylation producing monomethyl arsenic (MMA) and dimethyl arsenic (DMA). After As(V) addition, only MMA was observed and this was accompanied with a notable reduction in the ratio of As(V) to As(III).
在水培草莓植物的情况下研究了砷形态的积累和转化。通过根部灌溉，以 10、100 和 1000μg L 的浓度添加无机砷进行了培养实验。采用氢化物发生-原子荧光光谱法（HG-AFS）测定总砷含量。积累取决于添加到灌溉中的砷浓度和砷形态。砷 (III) 的积累速度高于砷 (V)。在根（0.44-4.10 mg kg）中发现比茎（0.43-1.27 mg kg）和果实（0.22-0.30 mg kg）中积累更多的砷。通过 HPLC-HG-AFS 分析获得的形态结果表明，添加 As(III) 导致部分甲基化产生一甲基砷（MMA）和二甲基砷（DMA）。添加 As(V) 后，仅观察到 MMA，并且伴随着 As(V)与 As(III) 的比例显著降低。
