What is the benefit of adding L-Cysteine.HCl.H2O to a mobile phase that already contains L-Cysteine free base for Hg speciation by HPLC-ICP-MS?

For Hg speciation by HPLC-ICP-MS, I prepared a Mobile Phase with 0.1% (m/v) of L-Cysteine free base + 0.1% (m/v) of L-Cysteine.HCl.H2O, pH 2.3, and I would like to know the main reason why both...

28 October 2022 1,392 5 View