Table 1 Operating conditions of Varian ICP-MS

Plasma conditions

RF power

1.40 kW

Plasma Ar flow rate.

18.0 L min⁻¹

Auxiliary Ar flow rate

2.25 L min⁻¹

Sheath gas flow

0.20 L min⁻¹

Nebulizer gas flow

1.0 L min⁻¹

Sampling depth

6.50 mm

Pump Rate

5 rpm

Instrument

Sampler cone: Nikel

1.0 mm orifice diameter

Skimmer cone: Nikel

0.5 mm orifice diameter