How to Efficiently Produce Ultrapure Acids

Table 1

Elemental concentrations (C) in blank solutions under optimized conditions (subboiling temperature 82°C, one distillation cycle).

	C > 100 ng/L	100 < C < 10 ng/L	10 < C < 1 ng/L	C < 1 ng/L
Nitric acid blank 2.75% w/w	Al Mn	Cu Ga Mg Ni V Zn	Ag Ba Cd Co Li Sr	Be Bi Cs In Pb Pt Tl U
Hydrochloric acid blank 0.1 M	--	Al Mg Mn Ni Zn	Cu Ga Li	Ag Ba Bi Cd Co Cs In Pb Pt Sr Tl U