Determination of traces of impurities in high-purity sodium chloride by differential pulse polarography and flame spectrometry

Pulse polarography - theory and application.

“…Their procedure allowed the determination of as low as 30 ng gallium in a 1 g sample; however it was necessary to eliminate most of the arsenic matrix by a prior distillation as arsenic(III) chloride or arsenic(V) bromide due to the interference of arsenic. Galan et al (48) determined traces of impurities (Cu, Pb, Cd, Zn, Mn, Mg, Sr and Ba) in high-purity sodium chloride by DPP and flame spectrometry.…”