Arsenic Species in Edible Seaweeds Using In Vitro Biomimetic Digestion Determined by High-Performance Liquid Chromatography Inductively Coupled Plasma Mass Spectrometry

Table 2

Operating conditions of the ICP-MS and the chromatographic systems.

Inductively coupled plasma mass spectrometry (ICP-MS)
Radio frequency power	1300 W
Sampler and skimmer cones	Nickel
Argon flow rates:
Plasma	15 L/min
Auxiliary	0.86 L/min
Nebulizer	0.96 L/min
Date acquisition mode	Graphics; (signal intensity versus time)
Analytical mass (amu)	^75As
Chromatography
Anion exchange
Guard column	IonPac AG 19 (50 × 4 mm)
Analytical column	IonPac AS 19 (250 × 4 mm)
Mobile phase	10 mmol/L CH3COONa, 3 mmol/L KNO3, 2 mmol/L NaH2PO4, and 0.2 mmol/L EDTA-2Na adjusted to pH 10.7 with 4% NaOH
Flow rate	1.0 mL min^−1
Injection volume	30 𝜇L