Setting For Flash Elemental Analyzer; Create A Gas Configuration For A Sulfur Measurement - Thermo Scientific EA IsoLink IRMS System Operating Manual

4. The gases needed (He, O
5. Leak-check all connections outside of ConFlo by brushing all fittings carefully with soapsuds.
6. The exhaust tube is connected to the ConFlo and ventilation is working.
7. SO
2
8. The pressure regulator for SO
9. The IRMS has been calibrated for SO
10. The Elemental Analyzer is switched on.
11. Adjust the gas pressure of Elemental Analyzer and ConFlo. Take the following settings as a
guideline.
•

Setting for Flash Elemental Analyzer

Table 23. Setting for Flash Elemental Analyzer in EagerSmart software
Carrier
Oxygen
Reference
Cycle run time
Sampling delay
Oxygen Injection End
12. Increase reactor temperature to 900 °C. After 10 minutes at this temperature, increase to 1020 °C.
Alternatively, use the HeatUp function in the context menu of the Flash IRMS peripheral
visualization
13. After 10 minutes at this temperature, increase to 1020 °C. Increase column temperature to 100 °C.
14. It is recommended to keep the reactor over night at end temperature to stabilize the conditions.
Note Teflon® tubings are not absolutely tight against atmosphere. Therefore, the backgrounds of
argon and nitrogen are higher than those of carbon and nitrogen measurements. Nevertheless, take
care of leaks.
Note When using reduced amplification (i.e. resistor of 1×10
background values will be three times higher.
Note Background values may vary depending on sensitivity and focus settings.

Create a Gas Configuration for a Sulfur Measurement

A Gas Configuration determines a combination of masses, which are collected in the cups, for
evaluation of ratios and eventually δ values. The Gas Configuration is specific for the particular gas and
is combined with a magnet field value taken from the mass calibration of your IRMS. The ratio groups
determine the reported ratios of predefined masses.
Thermo Scientific
) are available and have been connected to the corresponding positions.
2
is connected to the ConFlo.
"Setting for Flash Elemental Analyzer"
is heated.
2
measurements.
2
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180 mL/min
25 mL/min
20 mL/min
1000 s
10 s
3 s (or higher, depending on sample size and sample type)
EA IsoLink IRMS System for CNSOH Operating Manual
6
Using EA IsoLink IRMS System for CNSOH
Create a Gas Configuration for a Sulfur Measurement
10
Ohm on cup for mass 66), the
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