Agilent Technologies 7500 ICP-MS Operator's Manual page 99

Agilent 7500 ICP-MS ChemStation Operator's Manual
Tuning
2+
rates, while Ba is very low.
As an example, the relationship between carrier gas flow rate and signal using the
elements in the table is shown in the next figure.
Chemical / Physical Characterisisties of Selected Elements
Element Main isotope
(AMU)
Li 7
Be 9
Co 59
As 75
In 115
Ba 138
W 184
Pb 208
La 139
Ionization potential Boiling point
(eV)
5.39
9.32
7.86
9.81
5.785
5.21
7.98
7.415
5.61
Oxygen bond
( °C) strength (kcal / mol)
1327 81.4
2399 105.4
2747 88
- 115
2000 86
1639 130.4
5927 156
1750 90.3
3469 ?
4-23