Determination of Halogens by Ion Chromatography in Edible Mushrooms after Microwave-Induced Combustion for Sample Preparation

Table 1

Operational conditions for halogen determination by IC and by ICP-MS.

Parameter	Condition
IC
Stationary phase	Poly(vinyl alcohol) with quaternary ammonium groups
Mobile phase (mmol L^−1)	Na2CO3 (3.2)/NaHCO3 (1.0)
Suppression solution (mol L^−1)	H2SO4 (0.2)
Flow rate (mL min^−1)	0.7
Sample loop (µL)	20
Column	Metrosep A Supp 5 (150 mm x 4 mm i.d.)
Guard column	Metrosep A Supp 4/5 Guard (5 mm × 4 mm i.d.)
Detection	Conductivity
ICP-MS
Radiofrequency potency (W)	1300
Plasma argon flux (L min^−1)	18
Auxiliary argon flux (L min^−1)	1.20
Nebulizer argon flux (L min^−1)	0.95
Sample uptake rate (mL min^−1)	0.7
Spray chamber	Cyclonic
Nebulizer	Concentric
Sampler and skimmer cones	Pt
Ion lens	Auto lens “On”
Isotopes (m/z)	^79Br, ^127I