Simultaneous Determination of Cr, As, Se, and Other Trace Metal Elements in Seawater by ICP-MS with Hybrid Simultaneous Preconcentration Combining Iron Hydroxide Coprecipitation and Solid Phase Extraction Using Chelating Resin

Table 1

Operating conditions for the ICP-MS instrument.

ICP-MS: Agilent 7700x
Plasma conditions:
RF power	1.55 kW
Plasma gas flow rate	15.0 L min^−1 Ar
Auxiliary gas flow rate	0.90 L min^−1 Ar
Makeup gas flow rate	0 L min^−1 Ar
Carrier gas flow rate	1.05 L min^−1 Ar
Sampling depth (mm from load coil)	8.0 mm
Cell gas	He mode:4.3 mL min^−1
	H2 mode:6.0 mL min^−1
Nebulizer	Micro Mist
Sample uptake rate	0.45 mL min^−1
Data acquisition:
Accumulation time	0.3-1.0 s / point
Data point	3 points / peak
Repetition	3 times