Marin-5 Operator's Manual - CETAC Technologies

3 Adjust the Marin-5 heater temperature for best signal and
stability. Usually the temperature is adjusted ±10°C from the
preset factory temperature.
Introduction of Organic Solvents
Volatile organic solvents (e.g. 2-propanol, tolune, hexane) may be run
directly through the Marin-5 to the ICP-AES or ICP-MS. However,
introduction of organic solvents may require one or more of the
following procedure changes:
a
b
c
d
Use of a lower flow nebulizer, such as a 100µL/min nebulizer to
reduce solvent loading.
A lower cooler setting (for the condensor), such as -15°C to reduce
the level of organic vapor reaching the plasma.
The introduction of a low flow of oxygen (up to 100mL/min) into the
sample out line from the Marin-5 to the ICP torch. This flow of
oxygen helps prevent carbon buildup on the ICP torch and the ICP-
MS sampling cones.
Use a smaller diameter ICP torch injector tube to help minimize the
loading of organic solvent vapors into the plasma. A typical injector
diameter for organics is approximately 1mm or less.
Note:
Many ICP-AES and ICP-MS instruments have an oxygen addition
capability. The CETAC BGX-100 Blend Gas Accessory can be used
to simplify the gas addition. Please contact CETAC Technologies
at 800-369-2822, 402-733-2829, or custserve@cetac.com for further
information and assistance with regard to gas addition.
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