Natural Science Forum / Chemistry / Analytical Chemistry / July 2008

I'm looking a good way to analyse Na and K on 10 microg/l level. Does
any one have a good suggestions what method shoud I use. I don't have
an ICP on my disposal.

IET Ltd
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We've got a rather large set of GC data (> 20000 analyses) that we'd like to
re-analyze with different response factors, peak identities, etc.  Does
anyone have the actual file format for the GC Y vs pA data for the Agilent
(formerly HP) ChemStation .ch file?

I have acquired an ancient Nicolet Impact 400 FT-IR... *without*
PC card interface or PC software.
The FT-IR hardware seems functional.  That is, the mirrors scan on power
up and the scanning stops if the HeNe laser beam is interrupted as

Why cannot water be analyzed using Flame ionization detector (FID) in
GC?

How do I dissolve titanium dioxide?

To sci.chem.analytical -
Originally this post was sent to my psoriasis group, but I didn't
receive anything from them about my question about ZnO breaking
down in my mixture.

I perform a spectrometric (infrared) calibration to predict protein content  
in food. Let's say that my calibration error (mean square error between ir
predicted values and reference data) is 0.2. I also know that my reference
method for protein dosage has alsoo its own error, ...

can someone tell me how to determine salicylic acid, borax, and
resorcine in cosmetic products such as face tonic? for the
information, these active substances are dissolved in mixture of
alcohol and water with the presence of aceton and propylene glycol.

Hi, for granulometric analisys of powders refractive indexes of sample
and medium where it is disperded are required.
Whereas for mediums RI is quite easy to be found (4 example in CRC)
for typical pigments for ceramic sometimes is not so easy. If someone