Hi, Try Waters.com they has a good software for the GPC. ... _________________________________________________________________ Get a FREE online virus check...
Thank you for all the answers. I'd like to add that I'm talking about a PerkinElmer Series 200 Diode Array Detector. I don't have the choice of setting...
Hi eveybody, My name is Sergio Bodini and I work in Natural Products extraction and analysis I intend to buy a LC-MS. Could you give me some advices about the...
Hi, I need to buy an HPLC System. There is someone who works with HPLC systems from Thermo Finnigan (TSP, Spectra System, not Surveyor)? With DAD and...
Dear Friends, I am looking for the following spec hardware for Prep work. Will appreciate if anybody inform me about the best and cost effective source for...
One of my corcerns are unknown substances that may arise along stability studies. You can only know the UV spectrum of an unknown substance once it has been...
Dear friends, well i wnat to know about MS compatible buffers which are generally in use. becoz right now i am developing mehtod by using acetate buffer with...
... Don't use phosphates. Some labs report results with phosphate buffers present, but they are at *very* low concentrations. Nonvolatile buffers will form...
David Bostwick
david.bostwick@...
Feb 11, 2004 8:17 pm
1826
OK, I have a silly question. The HRMS that I am using has a parameter, sec / dec, that I cannot find a definition for. I am used to things being in terms of ...
Did you try ion-pair chromatography, I think there is a method along that line published in journal of pharmaceutical and biomedical analysis 2002. I don't...
I'm hoping that someone has had a similar problem and can help me in pinpointing the source of a problem with an HP 5890II GC, which is used in conjunction...
I run a DX500 HPIC instrument with an advanced computer interface, using PeakNet 5.01 software. I recently had to replace the computer that was running the...
You could find, an ion exclusion chromatographic method with UV at 210 nm detection, in the USP monograph on multiple electrolytes injection type 1. Roger...
Hi Jon, Its been a while since I ran an HP5890, and that didn't have EPC, but I believe that if the head pressure is being controlled by the total flow, then...
Dirk Holstege
dmholstege@...
Feb 20, 2004 8:45 am
1835
It's been awhile since I have worked with this system, but I seem to remember that the reading values on the keyboard are calculated values. The HP system is...
Engel, Marc
engelm@...
Feb 20, 2004 1:57 pm
1836
Another possibility is a blocked split line. We've seen this on a 6880 on a couple of occasions. The pneumatic system used by HP (now Agilent) is back pressure...
I have a graduate course in pharmacology this semester with one lecture devoted to QC of assays. If anyone has any good datasets they can share (drug name...
Dear members, Does anybody ever do research in separation of Tannnis?. I am doing research from liquid sample(liquid waste of Manufacture) and trying to ...
Does anybody give me a method for the determination of moisture in polymer products, in particular silicon polymers? Karl Fisher method doesn't work very well...
Hi everyone, I'm looking for a coloured traciant insoluble in water for Hydrodinamic monitoring of a bench scale reactor. Can someone help me? Andrea...
Perhaps you could put a bit of the polymer of known mass in a vial with a cap and septum. Heat the sample, but not so hot as to decompose the polymer. While...
I am doing semi preparative HPLC of a biologically active compound from a plant source by repeated injections using dichloromethane as mobile phase and a polar...
Hello everybody, Maybe someone can help me, I want to know what the procedure to make a blank run and a col comp in the EnviroQuant chemistation to FID. Thank...
Dear members of this list, I know Fourier Transform Infrared Spectroscopy (FTIR) is not the subject of this list but maybe you help me. I would like to get web...
Diego Delmonte
tequila2@...
Mar 2, 2004 9:42 am
1845
In my opinion, FTIR, too much peaks ( a lot of them), it´s hard to quantify, not impossible. I prefer thermal equipment, easy to use and precise. If you want...
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