By Anonymous on Tuesday, February 17, 2004 - 06:45 am:
Anyone had any trouble with these cartridge type filters - especially with wax columns??
I have two capillaries in my GC feeding from the same helium supply. One is a wax column and the other is a 624.
In the wax channel I have had a gross contamination. I have cleaned liners,washed injectors and carrier lines to no avail.
Today I replaced the filter (<2years old) and hey presto - clean baseline.
But I had no problem with the 624?
In the 2nd chromatogram after I replaced the filter I got a huge peak at the end of the ramp and a wavy baseline until the GC cooled. I assume this was the contaminant in the original filter passing through?
Has anyone had this before?
David
By Anonymous on Thursday, February 19, 2004 - 10:45 am:
hi i am student studying forensic science and need help!!
I am deperate for info concerning diagrams of apparatus used for removing accelerant from charcoal. i have been unsuccessful in locating any info regading this matter.
any help would be greatly appreciated.
By Anonymous on Thursday, February 19, 2004 - 11:05 am:
Carbon Disulfide?
By mgoodwin on Friday, February 20, 2004 - 09:29 am:
here's one site that posted a diagram of their apparatus:
http://www.geocities.com/SiliconValley/5804/article3.html
why not make your own diagram?