I have 6890N GC, 5975C MS, and 7697A HS Sampler and I am working with low sample volumes at a 0.1-0.01ng/mL concentration ranges. I was wondering if HS sampler can handle splitless injection.
Thank you for your help.
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I have 6890N GC, 5975C MS, and 7697A HS Sampler and I am working with low sample volumes at a 0.1-0.01ng/mL concentration ranges. I was wondering if HS sampler can handle splitless injection.
Thank you for your help.
HS may handle splitless injection and maybe not , it is all according to your flow rates and pressures .
in general when you want to apply splitless with HS you need to increase your column flow rate since HS flow maybe higher than your column so you system will not get ready .
but on the other hand GC MS needs slow flow rates which doesn't make sense
I recommend you first to adjust your ms method
try low resolution , maybe you need to change ion source temp or you EMV .
...
then try to optimize your head space method , maybe longer or shorter injction time or higher filling pressure .
...
also try splitless injection , if the system get ready so try to inject and watch your repeatability , but make sure to increase your purge time to make sure that every thing make its way into column
good luck
Splitless injection with headspace isn't supported. From the 7697 Advanced Operation manual: "With any inlet type, the HS supports only split inlet modes.
Splitless inlet modes are not supported."
Splitless injection with headspace isn't supported. From the 7697 Advanced Operation manual: "With any inlet type, the HS supports only split inlet modes.
Splitless inlet modes are not supported."
Thank you, Lance. I noticed it in the supporting documents. Could you tell me the theory behind this incapability?