Natural Science Forum / Chemistry / Analytical Chemistry / March 2007

Hi everyone! I have a big problem- I have high pressure on the
analytical column. To reduce it , I am washing column but...maybe
anybody knows another way to do it?
M.

Hi everybody, i'm new in this group. As i started working with an ICP-
OEs spectrometer and i've not experience in this tecnique i've a
question regarding the use of standard for calibration. The role of
anion in the solution of the cation(s) is important?. As most of the

This is probably an easy one, but it's been a while since I tried to
think about competing reactions. I'm analyzing gluteraldehyde and
formaldehyde concentrations via DNPH derivitization and HPLC. It's
come to my attention that I need to be sure the derivitization is

I blended dimethyl sulfoxide (DMSO) with tea tree oil (TTO). Both
liquids were clear-transparent before they were combined, but the
mixture has a blurry refraction; not cloudy though.
I do not wish to oxidize TTO's various terpenes. Would DMSO be expected

The technician for SEM told me that it is hard to obtain detailed
information for magnetic particles (such as Fe3O4) with realy small
size, say around 10 nm (sample has Au coating). Is it because of the
electronic field will interact with the magnetic particles and make it