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Table 2015.06B. Microwave operating parameters: Stages 1 and 2 are
operated sequentially, without removing vessels from the oven
Stage 1 sample digestion
1
Power
100% (1600 W)
2
Ramp to temperature
20min
3
Hold time
20min
4
Temperature
180°C
5
Cool down
20min
Stage 2 sample digestion
1
Power
100% (1600 W)
2
Ramp to temperature
20min
3
Hold time
20min
4
Temperature
200°C
5
Cool down
20min
Total
2 h
Table 2015.06C. Typical ICP/MS parameters for Agilent 7700x
RF power, W
a
1600
RF matching, V
1.8
Sampling depth, mm
9
Extract 1 lens, V
0
Carrier gas, L/min
0.9
Make-up gas, L/min
0.2
Nebulizer (glass concentric)
MicroMist
Spray chamber temperature, °C
2
Interface cones
Ni
He cell gas flow rate, mL/min
4.5
H
2
cell gas flow rate, mL/min
4.2
Nebulizer pump rate, rps
0.1 (0.5mL/min)
Peristaltic pump tubing
White/white, 1.02mm id
Drain tubing
Blue/yellow, 1.52mm id
a
RF = Radio frequency.
Candidates for 2016 Method of the Year
74