Dear Fellow Chromatographers, recently we substituted in our GC autoinjectors 5 µL syringes for 10 µL syringes, since they allow the injection of volumes <...
matthias.kummer@...
Oct 1, 2004 12:45 pm
1976
We had the same problem with 5 µl GC syringes in Thermo GC autosampler, and we work too with exane, water, chloroform, etc. and derivatizing reagents. It...
Can anybody tell me if there is any problem with determining the UV response factor (using linearity slopes) of a compound relative to another by performing...
Hi All, I have chromatographic data coming out from an HPLC column. The profiles are an overlap of Gaussian curves and each peak represents a protein of a...
Hi Parag, ... You can do the job in an Excel spreadsheet using solver option, unless you have many data points (practically more then 30000, 65536 is the...
Karol Pilorz
PILORZ@...
Oct 4, 2004 10:44 am
1980
Microcal Origin performs deconvolution much more easily than Excel, it have standard equations expecially for chromatography, like the EMG. Good luck Fabiano ...
Dear members of this list, I need your help in order to get some articles which these are very important for my work because I have any problems with certain...
tequila2@...
Oct 6, 2004 11:01 am
1982
Hello! all Kindly suggest to separate Organic compounds of mercury using column chromatography technique(s). With regards, Zia ...
We perform linearity studies using all of the analytes. If the analytes are well separated it really would not make any difference but it is a time savings to...
the shifflet's
shiffty@...
Oct 8, 2004 8:42 pm
1984
hi, i am a postgraduate student having an experience in non linear regression of retention structure with quantum chemistry and support vector machines ,...
There should be no major issues as long as the peaks are separated from each other and any other coeluting interferences. This assumes that you are working...
Dear All A small but annoying problem with Chromeleon (Dionex) and wondered if anyone else had suffered. The software hangs at various points whilst in the...
Hi Friends, I am a new member to this group and also to working with chromatography . I went thro' some of the previous mails and one friend was bored by the...
... whats the use of Internal standards? Two reasons: 1) The primary reason....adjusting for variation between sample volumes introduced into the instrument. ...
Hi to all, Have anyone experience to opening aerosol can , containing verry foaming liquid faze (water or water solvent basis)and C3-C4 propellent. Please help...
I would like to know who could help me making two HPLC/MS analysis of two samples (just two, I assure !) of green propolis ethanolic extracts from Minas...
Hi Silva, I have had to do this once. I froze the can in a bath of acetone/dry ice, then drilled a hole in it. Best Wishes, Dirk...
Dirk Holstege
dmholstege@...
Oct 18, 2004 3:23 pm
1993
Does anyone have a good source of solvent compressibility factors for commonly used mobile phases? I am particularly interested in water:acetonitrile...
Hi All: - Does anyone have any of the old quartz series I flowcells for the HP1040 in a drawer some where looking of a good home? I just cracked my last one. -...
Hi I am new to the group. Our lab is chasing pyridine and adenine nucleotide concentration in Islet of Langerhans cells. We are currently using RP-HPLC with a...
Dear Chrom-L members, I am looking for some journals which have relationship to the spectrofotometric method and also its application. Thanks Miya ... ALL-NEW...
Dear members of this list, I need your help in order to atribute the reason of a analytic problem to the electrode. I think it has problems when I measure pH...
tequila2@...
Oct 26, 2004 11:17 am
1998
Dear members of this list, I am looking for web pages where I can get information about chemistry of phenotiazines, information such as hydrolisis acid,...
tequila2@...
Oct 26, 2004 12:11 pm
1999
Dear all, Please let me know if you have successfully ran the USP GPC method for Dextran 40/Dextran 70, and if so, please respond to the following questions: ...
Please Provide GC/HPLC method of analysis for solanesol. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the...
Dear members of this list, I would like to take contact with people who work with Liquid Chromatography and have experience with HP 1100 and the software...
Diego Delmonte
tequila2@...
Oct 30, 2004 3:20 am
2002
Hi, Someone could point me some reference about interference of chloride in TMS reactions using a strong silyl donnor as MSTFA or BSTFA ? Any Book, Paper or...
Dear all members Hello I intend to determine and measure total organophosphate and organochlorine pesticides in soil and water. Coula anyone please help me...
Hello, I wonder if anybody experienced this or has any suggestions or ideas. I'm using LC/MS, where LC is Agilent 1100 and MS is from Applied biosystems,...
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