Natural Science Forum / Chemistry / Analytical Chemistry / June 2005

I am looking for the method for the analysis of protein upon the
Barnstein method.
I would like to know the difference between protein based on standard
Kjeldahl-Nitrogen,multiplied by 6.25 and the amount of proteinanalysed

Hi all...
just a not so simple question...
Is it possible to remove Methyl Isobutyl Keytone (Hexone) from Ethanol,
85IMS

I'm a student and looking for a GC method to analyse phytosterol
(beta-sitosterol, campesterol...) in natural extract. This method
should be validated (IUPAC, ISO...).
Could anyone send me a method (pdf, word...) or a free internet site to

What is the best way to destroy a spill of formaldehyde 37%.  The MSDS
mentioned sodiumbisulfite, but that doesn't work good.
Erik

i need some information about Ion-Chromatography and Conductivitysensors.
What classifies a "good", a "standard" and a "low-budget" CS? What order  
of magnitude is a typical conductivity in expermient (mineralwater, tap  
water, de-ionised water)?

I am working on a leaching experiment and have run into an issue.  I
plan to sample the leachate for metals analysis by ICP.  I am
considering concentrating a certain volume of the leachate, say 1L, and
bringing it down to 100 ml and testing off of that volume.  Based on