http://tech.groups.yahoo.com/group/chrom-L/ Chromatography, SPE, LC/MS, HPLC, GC/MS Wed, 10 Sep 2008 14:44:15 GMT nfitzgerald http://tech.groups.yahoo.com/group/chrom-L/message/2316 http://tech.groups.yahoo.com/group/chrom-L/message/2316 Thanks for everyone's help with my GCMS noise problem. I thought it might be good to post a follow up. After replacing the column, injector heater, liner, Wed, 27 Aug 2008 12:45:06 GMT Tony Herlt http://tech.groups.yahoo.com/group/chrom-L/message/2315 http://tech.groups.yahoo.com/group/chrom-L/message/2315 27th August 2008 Dear colleagues, We are trying to separate the cis/trans isomers of 1,2-dialkylcyclohexanes by HPLC, the aim ultimately being to obtain up to Thu, 24 Jul 2008 18:49:59 GMT nfitzgerald http://tech.groups.yahoo.com/group/chrom-L/message/2314 http://tech.groups.yahoo.com/group/chrom-L/message/2314 Hi, I'm having some noise issues that I'm hoping someone can help me with. I have a HP5890 GC and HP5970 MS. I recently fixed the injector heater and replaced Mon, 31 Mar 2008 14:47:50 GMT noziraf http://tech.groups.yahoo.com/group/chrom-L/message/2313 http://tech.groups.yahoo.com/group/chrom-L/message/2313 Anyone have simple method for preparation of hydroperoxy linoleic acid (13-HPOD and 9-HPOD) and hydroxy linoleic acid (13-HOD and 9-HOD) with linoleic acid ? Tue, 11 Mar 2008 06:40:28 GMT Tony_Herlt http://tech.groups.yahoo.com/group/chrom-L/message/2312 http://tech.groups.yahoo.com/group/chrom-L/message/2312 11th March 2008 Dear colleagues, Would any of you have information on uS Crestpak C18-S HPLC columns (u represents the Greek letter, mu), specifically, Mon, 03 Mar 2008 19:33:26 GMT Guilherme Vannucchi Portari http://tech.groups.yahoo.com/group/chrom-L/message/2311 http://tech.groups.yahoo.com/group/chrom-L/message/2311 Dear Colleagues, Excuse me to use the forum for this help. I'm needing an old article about glutathione dosage. If somebody can send me I will thank a lot. Mon, 03 Mar 2008 16:36:48 GMT nfitzgerald http://tech.groups.yahoo.com/group/chrom-L/message/2310 http://tech.groups.yahoo.com/group/chrom-L/message/2310 Hi all, I'm hoping someone could help me. We have started some experiments with PCBs. We extracted control and PCB spiked sediment samples by soxhlet Tue, 15 Jan 2008 01:29:35 GMT Guilherme Vannucchi Portari http://tech.groups.yahoo.com/group/chrom-L/message/2309 http://tech.groups.yahoo.com/group/chrom-L/message/2309 Dear colleagues, can somebody send me the article below? Ng HT, Chen CY, Hsieh HM, Leung WY, Ou MC, Tang WL. Amniotic fluid lecithin/sphingomyelin ratio in Mon, 03 Dec 2007 23:45:58 GMT Tony_Herlt http://tech.groups.yahoo.com/group/chrom-L/message/2308 http://tech.groups.yahoo.com/group/chrom-L/message/2308 4th December 2007 Dear colleagues, Would any of you know of a commercial source for an HPLC column packed with basic alumina (pH >= 9), particle size 10 micron Mon, 22 Oct 2007 09:37:53 GMT noziraf http://tech.groups.yahoo.com/group/chrom-L/message/2307 http://tech.groups.yahoo.com/group/chrom-L/message/2307 Did someone have experience for quantifying low concentration of lactic acid in rumen juice (10 µg/ml)with HPLC/UV or GC/FID system ? Thanks. Thu, 18 Oct 2007 18:06:44 GMT Guilherme Vannucchi Portari http://tech.groups.yahoo.com/group/chrom-L/message/2306 http://tech.groups.yahoo.com/group/chrom-L/message/2306 Dear Colleagues, Can someone send me this article, Lechner M, Rieder J. Mass spectrometric profiling of low-molecular-weight volatile compounds--diagnostic Tue, 02 Oct 2007 07:13:23 GMT Khalid ghaffar http://tech.groups.yahoo.com/group/chrom-L/message/2305 http://tech.groups.yahoo.com/group/chrom-L/message/2305 Ion-pairing reagents such as tetra-butyl-ammonium chloride and octanesulfonic acid tend to adsorb to reversed phase stationary phases like C-18, modifying Mon, 01 Oct 2007 17:14:24 GMT Gianfranco Bruno http://tech.groups.yahoo.com/group/chrom-L/message/2304 http://tech.groups.yahoo.com/group/chrom-L/message/2304 Please I need this article or similar: Thank you Gianfranco AU: N. Lammers, J. Zeeman, G. J. De Jong TI: Effect of some parameters on the liquid Thu, 20 Sep 2007 16:11:30 GMT Gianfranco Bruno http://tech.groups.yahoo.com/group/chrom-L/message/2303 http://tech.groups.yahoo.com/group/chrom-L/message/2303 Why a C18 Column with a mobile phase with ion pairing conditions on more time than a C18 with a mobile phase without ion pairing? thank you Gianfranco Wed, 18 Jul 2007 20:47:47 GMT creakinator http://tech.groups.yahoo.com/group/chrom-L/message/2302 http://tech.groups.yahoo.com/group/chrom-L/message/2302 Problem: We are consistently seeing peak(s) around 14-18 amu over 40 abundance in the autotune spectra on an Agilent 5973 MSD connected to an Agilent 6890 GC.