Synthesis of hydrochloric acid solution for total mercury determination in natural waters.
Total mercury (Hg(T)) determination requires the addition of concentrated hydrochloric acid solution (≥10 mol L(-1) HCl) in relatively high amounts to preserve the samples and to prepare reagent solutions. A method for the preparation of concentrated HCl with Hg(T) concentration of lower than 5 ng L(-1) is described in this article. It is based on the well-known chemical reaction: 2 NH(4)Cl + H(2)SO(4) → (NH(4))(2)SO(4) + 2 HCl. This method is validated thanks to the US Environmental Protection Agency method 1631 and standard reference materials BCR-579 (mercury in coastal seawater).
Laboratoire PROTEE (Processus de Transferts et d'Echanges dans l'Environnement), Equipe CAPTE, Université du Sud Toulon-Var, BP 20132, 83957 La Garde cedex, France. patel@univ-tln.fr
Nathalie
N
Patel-Sorrentino
Jean-Yves
JY
Benaim
Daniel
D
Cossa
Yves
Y
Lucas
D006851:Hydrochloric Acid / Q000138:chemical synthesis* / Q000737:chemistry; D008628:Mercury / Q000032:analysis*; D012623:Seawater / Q000737:chemistry; D012996:Solutions; D014867:Water / Q000737:chemistry*
D012996:Solutions; D014867:Water; D008628:Mercury; D006851:Hydrochloric Acid