Did someone just recently win the nobel prize for this? Could you give me his name? Also, I'm thinking of doing a talk on this and am wondering if there are ...
... For all your Nobel needs, try www.nobel.se Perhaps you are thinking of John Fenn and Koichi Tanaka who won part of the prize (it's shared among 3 people)...
We have a a Varian Saturn 2000 GCMS. At the moment we are experiencing major problems. We are currently changing filaments every 4 weeks or so, sometimes after...
A few years ago I set up another good chromatography resource online. It is located at http://ChromForum.com If your questions go unanswered here, you might...
dear all: These are my chromatogram picture.What's the matter on earth? The first one is the mixed standard ; The second one is the first injection of one...
... Only text can be sent to the list; if you included pictures or attachments they won't appear. You can upload your picture files to the 'Files' section of...
Dear all, I have a question about separation of mixture of hemoglobin, bovin serum albumin, and lysozyme by using HPLC. I have HPLC with isocratic elution...
I have seen some unusual peaks in the data from my HP5973 GC/MS. The peaks are very narrow and they are perfectly symmetrical. They appear in the last 20...
Hello, I need to write method deviation for HPLC assays and it require to define Sensitivity term and What is the significance of using sensitivity solution in...
The netCDF_AX object allows you to extract and modify data contained in AIA(cdf) output files. The object can be embedded in MS Excel, Visual Basic, MS...
... albumin, and lysozyme by using HPLC. ........ Maybe size exclusion chromatography can work for you. RP has little chance, isocratically. Hans...
Hans W. Mueller
Hans.W.Mueller@...
Sep 9, 2003 5:54 am
1685
Hi, Sensitivity is often described in terms of Limit of Detection (LOD) which can be defined as signal to noise ratio of 3 to 1. This is calculated by running...
The Shifflet's
shiffty@...
Sep 9, 2003 9:40 am
1686
... From: Bob Albrecht Gradient chromatography should work................... Bob, Saiful (original post) has only one pump. Hans [Non-text portions of this...
Hans W. Mueller
Hans.W.Mueller@...
Sep 10, 2003 5:57 am
1687
Darrel, How many actual data points make up the peak? If it is many, it is not likely electrical in nature. Dirk...
Dirk Holstege
dmholstege@...
Sep 10, 2003 8:15 pm
1688
Dear all Can anyone help me in giving more details on saponin analysis by HPLC and UV detection. I am unable to get a clear baseline due to the low wavelength...
Dear Chromatographers, We are a small laboratory and have a Waters 470 fluorescence detector in need of a replacement lamp. The local cost for the new...
Ellis, Andrew
andrew.ellis@...
Sep 11, 2003 10:05 am
1690
... They are probably arcs in the mass spec. The GC peaks for these are usually one spectrum only. Look at the spectra, and you'll probably see one or two...
David Bostwick
david.bostwick@...
Sep 11, 2003 2:13 pm
1691
The USP is a good source but there are other definitions for LOD and LOQ. There was an excellent article in LC/GC about a year or so ago that gave several...
The Shifflet's
shiffty@...
Sep 12, 2003 10:02 am
1692
If you need official definitions, you could find them in the USP. The Shifflet's <shiffty@...> wrote:Hi, Sensitivity is often described in terms of Limit...
Hello. My name is Juanjo Serrano and I studied Chemistry in Universidad de Valencia (Spain). I created two groups about Chemistry (one in YAHOO! and the other...
Hi, I am new to the group. I am really confused about the term LOD (Limit of Detection). I already have gone through the mails on the group regarding LOD but i...
Take a look at these: http://pubs.acs.org/hotartcl/ac/96/may/may.html http://www.ich.org/pdfICH/Q2A.pdf http://www.ich.org/pdfICH/Q2B.pdf ...
Poston, Phil
Phil.Poston@...
Sep 17, 2003 3:26 pm
1696
Dear member of this list, I am working with milk and I need to determinate any fasciolicides in this kind of sample. I started a search in the library of the...
Tequila2
tequila2@...
Sep 21, 2003 1:04 pm
1697
Mid-Atlantic estuaries provide important summer nurseries for the young-of-the-year (YOY) bluefish where they may also be exposed to the varying levels of...
Ashok Deshpande
ashok.deshpande@...
Sep 22, 2003 7:32 pm
1698
I got a GPC column with THF as Carrier but the problem is that the retention times keep on shifting and the peak shape is also changing with the retention time...
Groenewald, Conrad (CW)
conrad.groenewald@...
Sep 24, 2003 12:25 pm
1699
The variance you show is about 30 seconds. It could be temperature related. Unless you have a column oven it may take up to ten minutes at a given flow and...
Al Welchaxxiom
alwelch@...
Sep 24, 2003 1:53 pm
1700
My client is looking for a highly technical chemist to fill their Dallas, TX territory. Ideal candidate has been an organic chemist for the past 5 years or so,...
Hi all, can anyone recommend a column / columns combination for detecting a mixture of gas comprising:- CO2, CO, H2O, H2, N2, methane and methanol. I can live...
hi, i am currently trying to extract and analysis carotenoids and chlorophylls from algal lake sediments and am having a few problems. i have been following...
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