LC-MS, GC-MS, and other - Page 83 - Chromatography Forum

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Welcome! by tom jupille » Thu Mar 11, 2021 6:40 pm	0	120951	Last post by tom jupille Thu Mar 11, 2021 6:40 pm

Topics	Replies	Views	Last post
high source temperature by Spectro » Fri Aug 28, 2009 4:13 pm	5	3949	Last post by Ron Tue Sep 15, 2009 4:26 pm
GCT versus GC/MS in scan mode by Elena A.G. » Wed Sep 09, 2009 4:50 pm	3	3065	Last post by Ron Tue Sep 15, 2009 4:22 pm
Quantitative analysis using GC/MS by simonwei » Mon Sep 14, 2009 8:12 pm	1	2890	Last post by Don_Hilton Tue Sep 15, 2009 12:46 am
vapor standards calibration problem by hong2009 » Tue Sep 08, 2009 10:50 pm	4	2591	Last post by AICMM Sun Sep 13, 2009 8:25 pm
area counts silly question by hong2009 » Fri Sep 11, 2009 12:56 am	1	2505	Last post by sam.pedraglio Fri Sep 11, 2009 1:24 pm
Drift in LC-MS despite isotope internal standard by leka » Tue Oct 07, 2008 1:20 pm	12	6360	Last post by leka Fri Sep 11, 2009 11:43 am
Thermo Xcalibur data system by carpenh » Wed Sep 09, 2009 3:46 pm	2	3338	Last post by DR Thu Sep 10, 2009 3:30 pm
ion trap: is it correct for our application? by ctc040909 » Fri Sep 04, 2009 3:34 pm	2	2690	Last post by sam.pedraglio Tue Sep 08, 2009 8:18 pm
How to get rid of severe matrix effect? by Ruth » Fri Aug 21, 2009 2:48 pm	36	7948	Last post by Camisotro Thu Sep 03, 2009 4:57 pm
Tuning by Spectro » Thu Aug 27, 2009 4:16 pm	2	2805	Last post by Omaejel Thu Sep 03, 2009 2:45 pm
broad peaks problem by hong2009 » Mon Aug 31, 2009 9:54 pm	4	3138	Last post by hong2009 Tue Sep 01, 2009 7:03 pm
different peak size? by hong2009 » Tue Sep 01, 2009 12:29 am	1	2356	Last post by Don_Hilton Tue Sep 01, 2009 1:17 am
Explanation of regression weighting by Ruben » Sat Aug 29, 2009 11:15 am	1	2708	Last post by Don_Hilton Sat Aug 29, 2009 2:35 pm
what is he difference between selectivity and specificity ? by gxch43 » Wed Jul 29, 2009 2:04 am	6	8922	Last post by grzesiek Sat Aug 29, 2009 5:31 am
1/x weighting by petiti » Wed Aug 12, 2009 3:12 pm	3	4687	Last post by shahis77 Fri Aug 28, 2009 7:40 pm
book fragmentation LC-MS/MS by Fluterd » Wed Aug 12, 2009 3:46 pm	1	3333	Last post by RB Wed Aug 26, 2009 3:28 pm
Organic acid with Aminex-HPX-87H with LC/MS by zwitterion30 » Mon Aug 24, 2009 2:33 pm	2	4700	Last post by zwitterion30 Tue Aug 25, 2009 3:11 pm
Entrance Lens at zero voltage-5973 by BCBC » Mon Aug 10, 2009 9:55 pm	6	4340	Last post by BCBC Mon Aug 24, 2009 4:13 pm
getting rid of matrix effect by shahis77 » Thu Aug 20, 2009 9:30 pm	2	2712	Last post by shahis77 Fri Aug 21, 2009 3:55 am
discontinuous in peaks detection!! by che313 » Wed Aug 19, 2009 10:38 pm	3	2535	Last post by Ron Thu Aug 20, 2009 4:17 pm
220 and 503 isotopes by BCBC » Wed Aug 19, 2009 1:41 am	1	2486	Last post by gpronger Wed Aug 19, 2009 7:21 pm
Diffusion pump oil change frequency by BCBC » Mon Aug 10, 2009 3:24 pm	3	4205	Last post by Kostas Petritis Mon Aug 17, 2009 9:17 pm
Sample trapped in loop??? by Baffled Chromatographer » Tue Jul 28, 2009 11:13 pm	6	4265	Last post by mardexis Mon Aug 17, 2009 8:17 pm
Mass Spec Not Holding a Tune? by Omaejel » Fri Aug 14, 2009 7:23 pm	2	3007	Last post by Omaejel Mon Aug 17, 2009 6:16 pm
GC/C/IRMS anyone can help? by Pearline » Mon Aug 17, 2009 1:13 pm	0	2349	Last post by Pearline Mon Aug 17, 2009 1:13 pm
EPA 8260 Optimization (GC/MS w/ Purge-Trap & Autosampler by Caged Alpinist » Fri Jun 12, 2009 8:15 pm	22	9812	Last post by Omaejel Fri Aug 14, 2009 7:04 pm
8260 missing early eluters 5890 by Balderquell » Wed Mar 18, 2009 12:45 am	15	5491	Last post by JI2002 Thu Aug 13, 2009 6:17 pm
GCMS by aman » Mon Aug 10, 2009 12:16 pm	2	2421	Last post by ChromatographyDude Tue Aug 11, 2009 1:24 am
Problem with GCMS 4000 Varian by mabrouk mahmoud » Fri Aug 07, 2009 11:28 pm	6	3674	Last post by mabrouk mahmoud Mon Aug 10, 2009 8:52 pm
Strange extra peaks before the compound (GC-MS/MS) by Remu » Thu Aug 06, 2009 2:57 pm	4	3138	Last post by Remu Mon Aug 10, 2009 11:40 am
PCB analysis GC/MS by Ruben » Fri Jun 26, 2009 10:06 am	15	7247	Last post by mckrause Sat Aug 08, 2009 3:30 pm
Low response for hormones in pos mode but not neg on API3000 by sassman » Wed Jul 08, 2009 8:54 pm	15	5028	Last post by Camisotro Sat Aug 08, 2009 1:09 am
How to clean glassware to eliminate contaminants for LCMS? by BONGLINDA » Sat Jul 25, 2009 4:24 pm	14	14953	Last post by betox Fri Aug 07, 2009 4:50 am
Internal standard problem:( by smkh » Sun Jun 28, 2009 5:08 pm	13	4742	Last post by Rappoldbr Thu Aug 06, 2009 9:34 pm
A follow up to "unknown samples calculation" by lmh » Tue Aug 04, 2009 10:08 am	3	2839	Last post by lmh Wed Aug 05, 2009 12:32 pm
mass spec communication issues by MassSpecM » Mon Jun 22, 2009 1:11 pm	9	4354	Last post by MassSpecM Wed Aug 05, 2009 5:51 am
Unknown samples calculation by smkh » Sat Aug 01, 2009 3:42 pm	12	3430	Last post by Don_Hilton Tue Aug 04, 2009 12:35 pm
loss of anilines from 8270 soil extraction. help! by stewiegriffin » Mon Sep 08, 2008 11:52 pm	3	3567	Last post by Ron Mon Aug 03, 2009 12:54 pm
Is anyone performing a GC-MS method in Ramp Flow mode? by at_om » Wed Feb 11, 2009 4:53 pm	9	4084	Last post by gincot Sun Aug 02, 2009 3:51 pm
SAMe LC/MS/MS by DrLP98 » Fri Jul 31, 2009 2:12 pm	1	2334	Last post by chhubert Fri Jul 31, 2009 11:45 pm
CLENPROPEROL by Dr. Chandra » Fri Jul 24, 2009 7:43 am	3	2609	Last post by carras Fri Jul 31, 2009 11:53 am
response by shahis77 » Tue Jul 28, 2009 8:07 pm	1	2245	Last post by MaryCarson Thu Jul 30, 2009 8:05 pm
Sensitivity in MRM mode doesn't correspond to MS/MS by chern_es » Wed Jul 29, 2009 1:02 pm	4	3242	Last post by MaryCarson Thu Jul 30, 2009 7:51 pm
High Temperature Headspace Application by rbardsley » Tue Jul 28, 2009 8:43 pm	0	2272	Last post by rbardsley Tue Jul 28, 2009 8:43 pm
GC/MS column choice by alexduan » Tue Jun 30, 2009 2:19 am	4	3027	Last post by Ron Tue Jul 28, 2009 1:58 pm
Atorvastatin metabolites by smkh » Sat Jul 25, 2009 4:28 pm	1	2294	Last post by sam.pedraglio Mon Jul 27, 2009 10:29 pm
Corona CAD question by sanks086 » Tue Jul 21, 2009 10:36 pm	1	2374	Last post by bhuvfe Wed Jul 22, 2009 3:35 pm
5971 OS & Chemstation by BCBC » Mon Jul 20, 2009 1:42 pm	3	2457	Last post by gpronger Tue Jul 21, 2009 8:25 pm
6890GCMS "Communication timeout while reading MS respon by shushi2000 » Sat Jul 18, 2009 9:52 pm	1	2566	Last post by Caged Alpinist Mon Jul 20, 2009 8:15 pm
Step gradients - column shock? by Camisotro » Wed May 13, 2009 6:25 pm	26	7079	Last post by bob Fri Jul 17, 2009 1:36 pm

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