Measurement of Magnesium, Zinc, and Copper in Human Serum by Using Isotope Dilution Inductively Coupled Plasma Mass Spectrometry (ID ICP-MS)

Table 1

Instrument parameters.

Parameter	Mg	Cu	Zn
ICP RF power (W)	1100	1100	1100
Gas flows (L/min)	0.97	0.97	0.97
Lens voltages (V)	6.75	6.75	6.75
Analog stage voltage (V)	−1700	−1700	−1700
Pulse stage voltage (V)	900	900	900
Dwell time per AMU	2 ms	2 ms	2 ms
Scan mode	Peak hopping	Peak hopping	Peak hopping
Sweeps/reading	25	25	25
Readings/replicate	15	20	25
Replicates	15	20	25
Cell Gas A: CH4 (mL/min)	1.4	0	0.45
RP q: Ar (mL/min)	0.8	0.25	0.25