ICP-MS: the effect of spary chamber temperature changing

[Jaehwan Lee]

Hi, all,

Now, i'm using a Agilent ICPMS 7700, and 7900 in our lab.
My questions are as follows;
Now our spray chamber is 2degC.
Agilent model can be available from -5degC to 20degC for spray chamber.

I got the highest sensitivity in -5degC using 50ppt sample(H2SO4 solution) compared to 2, 10, 20degC.

I wanna know why the lowest temperature(-5degC) showed highest sensitivity.
Is anybody know this mechanism to explain about data?

Best regards.
Li

[jerole]

Hi,

At lower temperatures you remove more water from the aerosol and less water gets into the plasma. This also reduces the formation of interfering oxides in the plasma and you get a more stable response over time.

J

[Jaehwan Lee]

Hi,

At lower temperatures you remove more water from the aerosol and less water gets into the plasma. This also reduces the formation of interfering oxides in the plasma and you get a more stable response over time.

J

Hi, J
Thanks for your warmly respond for my question.
Thank you very much again.
Best regards.
Li