Table 2.

Operating parameters of the ICP-MS system.

Parameters	Value
RF power	1250 W
RF matching	1.45 V
Sample delay	90 s
Sample uptake flow	0.1 ml·min−1
Sample depth	6.4 mm
Plasma gas	15 L·min−1
Carrier gas flow	1.2 L·min−1
Auxiliary gas flow	0.9 L·min−1
Pressure analytical	3.10−4–2.10−3 Pa
The ion lens voltage	5.75 V
Coolant flow	2.2 L·min−1
Coolant temp	2°C
Data acquisition:
Peak pattern	Full quant (3)
Integrations time	0.1 s
Repetition	3
Analytical mass	Fe (57), Zn (66), Mn (55), As (75), Cu (63), Cd (111), Hg (202)