Table 1.

Operating conditions of HPLC-ICP-MS

ICP-MS operating parameters		HPLC operating parameters
RF power	1600 W	Mobile phase composition	2 mM 1-octanesulfonic acid sodium salt, 2 mM malonic acid, 4 mM tetramethylammonium hydroxide solution
Plasma gas flow	16.0 L/min	Mobile phase pH	4.13 (± 0.02)
Auxiliary (makeup) gas flow	1.2 L/min	Mobile phase flow rate	1 mL/min
Nebulizer (carrier) gas flow	0.98 L/min	Injection volume	20 µL
Nebulizer type	Meinhard	Degasser	On
Monitored ion	m/z 91 (75As 16O+)	Column temperature	Ambient
		Acquisition time	240 s (4 min)