Dear All I want to have details of the above RCM module of Waters Corp. How 47 X 300 and 57 x 300 both dimenssion rcm cartridges can be fitted in the same prep...
Dear colleagues, Would anyone know what the stationary phase is in a DBX-525 capillary GC column? It may be an experimental phase, since there is no reference...
Tony Herlt
herlt@...
Feb 7, 2002 4:40 am
1101
Hello Tony, Are you referring to the DB-5.625 column? If so, that column is a 5%-phenyl-95%-dimethylpolysiloxane equivalent. It is essentially the same as a...
jason_ellis@...
Feb 7, 2002 3:08 pm
1102
Just testing... I received an error message when sending a previous message. Phil Calvert North Carolina State University...
Greetings all! Does any one have experience analyzing for Bitrex (Denatonium Benzoate) by HPLC? Thanks, George...
gperham@...
Feb 7, 2002 10:53 pm
1104
Location: Cambridge, MA Compensation: very competitive(commensurate with experience) JOB DESCRIPTION Assist in development and optimization of HPLC based ...
A common troublshooting as you can see in tha attached file is when in the chromatogram at the begin I have a noise in the baseline before there is the front...
Dear all ! Does any one have experience analyzing for Carbocysteine and degradation products by HPLC ? Thans Imma ...
inmaculada.herrero@...
Feb 11, 2002 9:23 am
1107
If you are looking for software to solve specific issues in your laboratory or office, issues such as bridging instruments and PCs, MS Excel or Access...
Hi I need to set up a method for the chiral resolution of D and L-pyroglutamic acid (5-oxoproline) at low concentrations (from human urine). I think that uv at...
John Jackson
jmjj@...
Feb 13, 2002 11:41 pm
1109
Hello, I've got a problem with my separation on a RP-HPLC system: If i change the polarity of my mobile fase(from 10% CH3CN to 5% CH3CN) the sequence of the...
Hi, It sounds like you have a multi-modal separation process. In a strictly reversed-phase system the sort of change that you are talking about would not...
The Shifflet's
shiffty@...
Feb 15, 2002 10:48 am
1111
Dear Adrie, this phenomenon is not that unusual. I've seen this too some time ago. In a well known model of RP HPLC the logarithm of the retention factor (log...
matthias.kummer@...
Feb 15, 2002 11:24 am
1112
Actually, it's not unusual at all. If you want to see additional examples, go ahead and download the evaluation version of the DryLab program ...
Tom Jupille
joop@...
Feb 15, 2002 5:37 pm
1113
I have developed an ActiveX library that makes it easy to load ChromPrefect Spirit, EZChrom Elite or any AIA/ANDI (CDF) formatted files into Visual Basic or...
I'm working on a drug & metabolite extraction procedure from human WBCs that have been pelleted. Does anyone have a general protocol for sample preparation of...
Poston, Phil
Phil.Poston@...
Feb 21, 2002 9:50 pm
1115
Hi I'm trying to track down a UK supplier for several flavones, most especially: beta-8'-Apocarotenoic Ester Canthazanthin Lycopene Any ideas? Nigel Atkinson ...
Hi, I'm looking for a supplier of ITO micro syringe for HPLC autosampler in Europe. Any idea would be appreciate. Thanks in advance. Franck Himbert University...
Franck Himbert
franck.himbert@...
Feb 26, 2002 5:22 pm
1117
Dear Nigel, 1) The compounds you are mentionning are not flavones but carotenoids (somewhat different) 2) Why would you restrict your search for suppliers to...
Hi I am running RP-HPLC on the Water Soluble fractions of cheese on C8 Column.I would like to know any easy method for checking the repeatability and ...
Hi Vivek, Here are some detals extracted from HPLC Reference Managerâ„¢ software (<A HREF="http://www.limathon.com/products.htm">www.limathon.com</A>) Reversed...
LIMATHON@...
Feb 27, 2002 3:39 pm
1120
Dear friends : I'm looking for Ampicillin benzathine and Benzathine (The oily pure liquid, N,N'-Dibenzylethylenediamine, Merck Index 12nd. ed. 1092) to buy,...
rmartins
rmartins@...
Feb 27, 2002 10:53 pm
1121
Dear all members, Our laboratory recently installs a GCMSD with chemical ionization mode for trace analysis of pesticides etc. Since I am a layman in this...
Hubert
chhubert@...
Feb 28, 2002 6:45 am
1122
Dear all! We analyze petroleum asphaltenes samples with a GPC system (Waters 600 pump, one Plgel and one Styragel HR 0.5 columns with UV-DAD detector). THF was...
N. Pasadakis
pasadaki@...
Feb 28, 2002 12:37 pm
1123
Nikos When we did similar work many years ago we always used freshly distilled THF (the distillation process is hazardous and appropriate precautions must be ...
Hollis, Gordon
mgh36910@...
Feb 28, 2002 1:43 pm
1124
Have someone an explanation about peak tailing in chromatograms where GC/ELCD (electrolytic conductivity detector)is used in halogen mode? Is this tailing...
Dear all! Any body know about application note/methode to separate cellulose mononitrat, cellulose dinitrat & cellulose trinitrat using HPLC? Thank's for your...
aprianty@...
Mar 7, 2002 2:18 am
1126
Prova...
Gianfranco Bruno
supergiaf@...
Mar 7, 2002 5:48 am
1127
Dear All We are doing a urinary catecholamine analysis, and the samples may have to be frozen over a period of several months. Can anyone reccommend a protocol...
Hi, I would select a few montior compounds, prepare a standard of the monitor compounds and set limits (based on experience with the method) for precision (n=5...
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