Comprehensive evaluation of matrix effect in the detection of Zn, Cd, Ni, Cu, Cr and Pb by solution cathode glow discharge optical emission spectrometry

Concomitant ion matrix effects in SCGD-OES enhanced with formic acid

“…This observation matches the result from Cai et al , showing that the positive HCOOH influence was hampered by Na + presence, though CVG-prone elements suffered less. 34 On the other hand, analyte response is still promoted by the addition of HCOOH even if there is a high concentration of alkali earth metals (Mg 2+ and Ca 2+ ) in the incoming solution. However, Mg 2+ and Ca 2+ decrease the HCOOH enhancement for Fe while Ca 2+ promotes HCOOH enhancement for Sr and Li.…”