ponic culture, the nutrient solution was replaced with one
containing varied levels of As (0, 0.005, and 0.025 mmol),
as either AsIII or AsV
, with different concentrations of P (0,
0.005, and 0.025 mmol). Each treatment was performed
in triplicate, and the containers were placed randomly in a
plastic tray. After 8 weeks, the plants were harvested and
washed carefully with 1% HNO3
followed by distilled water
and deionised water. The shoots, roots, and flowers were
separated, oven-dried at 60
°C for 72 h, and ground into
powder. As content was determined by graphite furnace
atomic absorption spectrometry (GFAAS) using a GBC
909A (Victoria, Australia) with a detection limit of about 5
µg L-1. Internationally certified reference (soil) samples at
Massey University were used as controls. The recovery
test showed a recovery of more than 92±4%.
ponic culture, the nutrient solution was replaced with one
containing varied levels of As (0, 0.005, and 0.025 mmol),
as either AsIII or AsV
, with different concentrations of P (0,
0.005, and 0.025 mmol). Each treatment was performed
in triplicate, and the containers were placed randomly in a
plastic tray. After 8 weeks, the plants were harvested and
washed carefully with 1% HNO3
followed by distilled water
and deionised water. The shoots, roots, and flowers were
separated, oven-dried at 60
°C for 72 h, and ground into
powder. As content was determined by graphite furnace
atomic absorption spectrometry (GFAAS) using a GBC
909A (Victoria, Australia) with a detection limit of about 5
µg L-1. Internationally certified reference (soil) samples at
Massey University were used as controls. The recovery
test showed a recovery of more than 92±4%.
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