Arsenic Species Analysis at Trace Level by High Performance Liquid Chromatography with Inductively Coupled Plasma Mass Spectrometry

Figure 1

Chromatograms of arsenic speciation by gradient elution using mobile phase A: 1.25 mmol/L of Na₂HPO₄ and 11 mmol/L of KH₂PO₄; mobile phase B: 2.5 mmol/L of Na₂HPO₄ and 22 mmol/L of KH₂PO₄, 20 μg/L for each arsenic speciation.