Natural Science Forum / Chemistry / Analytical Chemistry / May 2007

In connection with the current interest in analysis of food products for
melamine and related triazines, I am looking for a source for ammelide,
CAS 645-93-2. FDA says that TCI America is a source for the compound but
TCI says they have no stock and it is not clear to me that ...

Need some help here. Can someone suggest a source of pH electrodes and
transmitters for the in-line measurement of H2O2 (hydrogen peroxide)?
The setup is as follows:
H2O2 flowing in a tube of about 10mm diameter. Temperature about 40 to

A list of chemical equation balance software
Hello, my friends.
I'm a editor at a educational press. Recently we are compile a test
book

 I'm working on separation of PGMs. I have to analyse Rhodium(III)
using uv-vis spectrophotometry. All the literature and books suggest
heating to dryness, dissolution and fusing. I have to do 10-20 samples
per day. I'm looking for some alternative no-heat method. Anyone can

This is very basic question because I did not have any experience in
the field. I sent my samples to analytical center for determination of
stable isotope ratios and concentrations. Instead of giving me the
result I requested, they just send me the data of cps (counts per

Anybody knows the reaction velocity or rate of reaction for calcium
carbide ?

Hi, i'm trying to oxidize an organic matter containing Cr(III) with
H2O2 and HNO3 for a following analysis. Unfortunately I saw from the
reduction potentials that in this case the reaction Cr(III)-->Cr(VI)
is favourite. Someone can suggest how to oxidize the full organic

Basic Techniques:
1) Linear sweep and cyclic voltammetry and chronoamperometry.
2) DC voltammetry and chronoamperometry.
3) Normal and reverse pulse voltammetry and chronoamperometry.