Speciation of chromium by coupled column HPLC-ICP-MS - the effects of interfering ions.
ICP-MS is used as an element selective detector for chromium species in aquatic samples using a coupled columm system consisting of a cation guard column and an anion column. The effects of large concentrations of disturbing ions, like NO(3)(-), Cl(-), CO(3)(2-) and SO(4)(2-), are discussed and the comparison with the use of different chromium isotopes for data acquisition is given. Quite low concentrations such as 100 mg/l of CO(3)(2-), 10 mg/l Cl(-) and even 5 mg/l SO(4)(2-) can cause an overestimation of chromium if not properly resolved1995 / Accepted: 24 October 1995
Pantsar-Kallio
M
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Lahti Control and Research Laboratory, Niemenkatu 73 C, FIN-15210, Lahti, Finland.
Manninen
P K
PK