Discussion Category:  Elemental Analyzers

Decrease in Sulfur peak on BBOT standard

What would cause a decrease in the Sulfur peak? What changes would occur if it is time to change the Chromatographic column?

LabRat90

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LabRat90
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avatar placemarkReply by
Dim

If there is no problem with Nitrogen, Carbon and Hydrogen peaks, then the sulfur conversion is not complete. Try to add some vanadium pentoxide into the sample tin 8-10mg should be enough. If you do not have any changes in retention time of the peaks, the separation is good and your system is leak free, probably the column is OK. Compare your blanks and standards to the one you had run some months before and check the differences.

D

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LabRat90Reply by
LabRat90

I increased the Vanadium from 8-9mg up to 9-10 mg. I'm still having the same problem in detecting the sulfur peak. Previous standard runs were detecting this peak. Any suggestions?


LabRat90  
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avatar placemarkReply by
Leo_tech

Have you tried increasing the oxygen dosing time?

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