Natural Science Forum / Chemistry / Analytical Chemistry / April 2004

Can anyone tell me if there is a simple way to tell if a white powder
is magnesium oxide or calcium oxide?
The background is that we are doing an experiment in which we try to
produce a calcium vapour in a vacuum chamber.  We do this by heating a

Could somebody please write me the properties of  the Calcium
hexacyanoferrate ( II)
Ca2(Fe(CN)6)
I couldn't find anything on the net......

Dear Chemistry Experts,
I have a little question about the oil-soluable fluorescence dye for
silicone oil used in one of microfluidics reseach.  Before I also worked on
water based solution, I used Rhodamine B dye or FITC.  But these two don't

Does anyone know the manufacturer(s) of the above LC Column?

Does anyone know of a tool (software) that can be used to produce a 3D
plot of GC/MS data?

Hello, I came across an interesting concept and I was wondering if will
would help me out?
What do you know about encapsulation of waste as a remedial technology?
How can encapsultion of waste occur during an environment site analysis?

I have a 166 detector that gives me the "sample side blocked error"
when I try to calibrate.   Has anyone had this error before.  It began
when we could not set the wavelenght, it would keep returning to 0.  I
have done the following.

I am starting a class in NMR and am confused about what I am
measuring.  Can someone please explain me what I am acutally
measuring?  Sometimes I see the x-axis measuring frequency then
sometimes I see it measuring ppm.  What is ppm?  Additionally, is the

Does any one know what does it mean, AFS HG?
Thanks,
A.

do you know a site where it talk about quantification citriq acid with
a spectrophotometer
thanks

I am considering doing a highschool research project on "ion pairing,"
and its effect on fp depression and bp elevation in solutions.
Mohammed Farooq directed me to a website which mentions ion pairing:
http://dbhs.wvusd.k12.ca.us/webdocs/Solutions/BP-Elev-and-FP-Lower.html

2002 IBO Industrial Design Awards
On August 31, 2002, Instrument Business Outlook announced the 2002
Industrial Design Awards for the ninth consecutive year. In choosing
the winners, IBO considered "the innovation, functionality and

does any one know a solvent for ethylene butyl acrylate polymer? We
tried several solvents like HFI and o-cresol but the polymer chips
don't dissolve at all.
Thanks oenp

We need purified air for sampling volatile emissions.
This is done in a thermostatted room. Now, it appears
that we have a lot of C15-C16 in the air, very likely
originating from the thermostatting device (oil and/or grease?).