Dear All, Recently i have started working with MALDI-ToF-MS. I am new to this area. I would like to know that the spectra which i get in MALDI (m/z) can be...
Does anyone know how does that column work with mobile phases, how do i pack it or anything that needed to be noticed?? (i only know it's used to remove the...
I've never done MALDI, but i have done a lot of electrospray MS. In our software (LC2Tune is the program that collects the data and monitors the machine), the...
I am switching between 2 LC-MS methods one of which is mobile phase (A: 0.1% FA, B: ACN/0.1%FA) and the other I call Mobile phase 2(A: 95/5 H20/ACN /5mM...
Hi, i'm working with an AKTA Basic 10 HPLC system and I received the warning "Lamp Module Failure". I called Amersham and they say that it's going to cost us...
I think I am having a contamination problem after I filtered buffers by using kelex-100. There were more unknown peaks produced on the chromatographs, and they...
Hi colleagues chromatographers, I want some help about the ZB-AAA GC column (Phenomenex). Can someone tell me which phase it has and its polarity'? I have...
Can anyone help me with development of a method to determine calcium content in tablets by HPLC using a fluorescence or UV detector? They are the only...
Hi, A quick search on SciFinder yielded the following articles that may be of interest to you. I would be happy to help with the French one if you get stuck....
Dear friends, I am working on development of plasma catecholamines method for HPLC with, preferrably eletrochemical detection. Any of you have some insight...
Maurício Pacheco d...
mpa@...
Aug 10, 2004 12:20 pm
1935
Dear friends, I am working on development of plasma catecholamines method for HPLC with, preferrably eletrochemical detection. Any of you have some insight...
Maurício Pacheco d...
mpa@...
Aug 10, 2004 12:21 pm
1936
I used a Biorad method for plasma catecholamines with an extraction through alumina butr now I prefer the method with fluorimetric detection of Recipe ...
Gianfranco Bruno
gianfranco.bruno6@...
Aug 10, 2004 3:14 pm
1937
Dear friends, I'm using capillary chromatography (Agilent-6890 with FID) with split (ratio 20:1) and cannot pass system suitability for peak areas (about...
SOme references. You may find much more from Scifinder: Evaluation of a simple plasma catecholamine extraction procedure prior to high-performance liquid ...
Sima, It seems like your problem is most likely injection related and not column related. I would 1)Make sure your not overloading the injection port....
George Perham
gperham@...
Aug 11, 2004 11:44 am
1940
Dear Sima, if it is possible in your special case you could consider the use of an internal standard. Sincerely, Matthias ...
matthias.kummer@...
Aug 11, 2004 12:59 pm
1941
Dear Chromatographers I would like to know if somebody could send me a copy of TURBOCHROM v 4.0 for my Perkin-Elmer GC . I guess there are so many files...
Dear all, I feel very inspired and encouraged with all the e-mails in this group. My background includes bachelors degree in pharmaceutical sciences and a ...
Dear friends Molamma and Gianfranco, Very thanks about your contacts and insights. They will be very usefull. Best regards, Maurício Pacheco PS: Gianfranco,...
Maurício Pacheco d...
mpa@...
Aug 12, 2004 1:58 pm
1944
Hi, I would also recommend an internal standard. I would also try a goose neck liner with the narrow end inserted toward the gold seal. What is your injection...
the Shifflets
shiffty@...
Aug 17, 2004 12:46 am
1945
Hello friends Does any of you have a HPLC test method for alpha-tocopherol? Appreciate any help on this matter Pedro Bento...
I was hoping folks could help me with generating a general robust method for assessing small molecule compound purity via HPLC/UV. Our current method consists...
hello important things to ener in account: 1. with the Software of the equipment between estandar and sample the match angle smaller of 15 must , this is tip...
Hi, This looks like a good method, and no one method will be capable of separating and detecting every analyte. That being said I have a couple of questions /...
the Shifflets
shiffty@...
Aug 29, 2004 12:38 pm
1949
Thank you for your response. I am currently using a diode array detector and monitoring at 210nm. Under this particular method, when analyzing our lead...
Hi All, I am troubleshooting a transport assembly on an Agilent 1100 series HPLC auto sampler. Does anyone have the torque2 macro for testing the belt...
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