Table 1.

ICP-MS operating conditions

Spectrometer	Elan DRC-e (Perkin Elmer SCIEX, Norwalk, CT, USA)
Sample Introduction	Scott spray chamber
RF Power	1000
Skimmer cone	Nickel
Sampler cone	Nickel
Gas flow rates (L min−1)	Nebulizer gas flow: 0.81, Auxillary gas flow: 1.20 Plasma gas flow: 19
Scannig mode	Peak hopping
Analytical masses (amu)	Standart mode 138Ba, 208Pb, 111Cd, 52Cr,75As,60Ni, 59Co, 51V, 66Zn, 63Cu, 82Se
Number of sweeps/reading	20
Number of readings/replicate	1
Number of replicates	3
Auto sampler	CETAX ASX-520
Dwell time per AMU (ms)	50
Sample flush	Time (50), speed (± rpm)-48
Read delay	Time (15), speed (± rpm)-20
Internal standart	Tb