Natural Science Forum / Chemistry / Analytical Chemistry / August 2004

A thermometer gives a reading of 96.1F +/- .2F
What is the temp in C? What is the uncertainty?
I know this prob easy, but I need help in it. Thank you in advance.
--John

I had earlier asked the references to the titrimetric determination of
EDTA in milk and someone referred me to an article in "The Analyst",
which was certainly useful but does not involve back-titration of EDTA
but the main focus was on the removal of phosphate in milk by

Hi again people,
I'm hunting for manuals to accompany these early model HPLC pumps. Can anyone help?
Thanks,
Adam

is this possible? how?

Hey, does everone know this answer:  
 "The residual water in solvents can be removed by pressing a sodium
wire into the solvent. This method cannot be applied for halogenated
solvents. Why? what alternative methods are available?"

Can I please get the answers to your quiz?
Charlotte

In the hands of a skilled analyst, what is the precision of a
volumetric flask marked "Class A, TD 100 +/- 0.08 ml @ 20 Deg. C."  I
read that labling as an accuracy statement, but how repeatable is it?
When I look at buying a micropipettor, they are sold with both

I'm doing an experiment on the effects of microwave cooking vs
conventional cooking on Vitamin C levels in food so i'm planning to
use the iodometric approach.
But the problem is I don't know how to start.