Natural Science Forum / Chemistry / Analytical Chemistry / May 2004

Do you think that HAt is dangerous and will dissolve my intestines or
will it be healthy ?

Hi, Dear friends:
I found C16 acid and C18 acid in Potassium Hydroxide pellets (fisher),
I am using KOH + silica gel to extract organic acids. Could any of you
please give me some advice on how to purify the potassium hydroxide

Hi, Dear friends:
I found C16 acid and C18 acid in Potassium Hydroxide pellets (fisher),
I am using KOH + silica gel to extract organic acids. Could any of you
please give me some advice on how to purify the potassium hydroxide

It might have been asked a thousand of time but, I couldn't find any :S
I'm looking for a freeware able to read RAW data files from a
gc/lc-ms. But my main OS is Linux so if it can be run under a nix
platform.... :P

I need a method to analyse biogenic amines with a hplc with a uv-vis
detector, and a C18 column. If somebody was so kind to give me a
reference of an article in a scientific journal,I would be very
grateful.

What is the procedure of determining COD in seawater, given that the
COD should usually be less than 100mg/L and thus dilutions (to make Cl
2000mg/L) will not allow accurate determination.
Thanx!

Subject: got S H I T ???
Newsgroups: sci.chem
Date: 2001-05-19 18:08:52 PST
You do if you have Shimadzu equipment in your lab!

I'm strugling to collect information concerning the 5um Bio-Sil NH2
HPLC packing material. I have this packing material here and I would
like to know the pore size (its not on the bottle). It appears that
there is almost now information available on the internet concerning

I would like to determine mandelic acid in urine.
If there is anyone who could give me some information, it would be
appreciated.
thanks,

can someone tell me how clorine gas can be white on litmus paper. I
thought UV only went blue if alkali or red if acid??

Using PeakFit software (www.seasolve.com / www.systat.com), you can
easily fit derivative spectra without programming.  Since PeakFit is a
general nonlinear fitting engine, you can load your data and fit it
with a user defined function that is the derivative of the underlying

I am in search of a good reference on the chemical kinetics of
gunpowder.  Specifically, can anyone tell me a reference (website,
book, etc.) that has all of the relevant reaction steps, rate laws,
and the rate constants in Arrhenius form ( k = A*T^n*exp(-E/(RT) )?

I am wondering if anybody could help me with a macro that allows for
the NIST JCAMP-DX IR Spectrum Data (which I can download in a .txt
file) to be imported into Excel.  I am a field industrial hygienist
and need to access the infrared spectrums of the chemistry that my

4 capsules to equal 6 milligrams of lutein?  to get 6mg of active Lutein at 5%
how many millegrams are needed

We recently purchased a XRF instrument to use with metal samples
(measure Ni, Co, S, P, As, Fe), and powders (oxides).
We lack of XRF expertise so we need to ask:
1) is it better to use for calibration commercially available