Comparison of DMA-80 and ICP-MS Combined with Closed-Vessel Microwave Digestion for the Determination of Mercury in Coal

Table 2

ICP-MS working conditions.

Item	Value/status	Item	Value/status
Plasma RF power	1400 W	Uptake time	60s
Nebulizer gas flow	1.01 L/min	Washout time	100s
Auxiliary gas flow	0.90 L/min	Pole bias	−6.0 V
Cool gas flow	14 L/min	Hexapole bias	−5.0 V
Sampling depth	100steps	Number of main runs	3
ICP-MS interface	Nickel xt	Dwell time	10 ms
Peristaltic pump speed	30 rpm	Acquisition mode	Peak jumping mode
Spray chamber temperature	2°C	Number of channels	3